A vibration motor includes a stationary portion and a movable portion to vibrate in a central axis direction with respect to the stationary portion. The stationary portion includes a housing and a coil on an outer side in a radial direction of the movable portion. The movable portion includes a core portion including a magnet. The housing houses the movable portion and the coil, and includes a peripheral wall portion on an outer side in the radial direction of the coil and extending in an axial direction, and a magnetic portion on a portion of the peripheral wall portion and including a magnetic body. At least a portion of the magnetic portion opposes the coil in the radial direction and extends in a circumferential direction. The peripheral wall portion includes a through hole adjacent to the magnetic portion in the axial direction and extends in the circumferential direction.
H02K 33/18 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
An inverter circuit includes at least three output terminals, a first input terminal, a second input terminal, and at least three series bodies. A total switching duration and a one-phase fixed duration are present within a single cycle of AC output. The waveform of each phase of an output voltage is such that a shared offset wave is deducted from a sinusoidal waveform. The waveform of the offset wave matches one phase of the sinusoidal waveform, or matches a waveform obtained by shifting the one phase of the sinusoidal waveform in the amplitude direction, during the one-phase fixed duration. During switching between the total switching duration and the one-phase fixed duration, the inclination of the waveform of the offset wave either continuously changes or remains fixed.
H02P 27/14 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation with three or more levels of voltage
A motor includes a rotor rotatable about a central axis extending vertically, a stator radially opposed to the rotor, a circuit board located axially below the stator, a housing in which the rotor, the stator, and the circuit board are accommodated, and a resin portion located on an upper surface of a bottom plate of the housing and covering at least a portion of the stator and the circuit board. The bottom plate of the housing includes a processed portion that is in contact with at least a portion of the resin portion. A surface of the processed portion is rougher than a surface of the bottom plate excluding the processed portion.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
F04D 25/06 - Units comprising pumps and their driving means the pump being electrically driven
F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 1/22 - Rotating parts of the magnetic circuit
H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
A blower includes a first axial fan, a second axial fan, a first current plate, and a holder. The second axial fan is located on one side in the axial direction with respect to the first axial fan. In the first current plate, first hollow cells partitioned by a lattice-shaped first partition wall and penetrating in the axial direction are two-dimensionally arranged. The holder holds the first current plate. The first axial fan is connected in series with the second axial fan in the axial direction via the first current plate and the holder. The holder includes a support portion that includes opening portions opened in the axial direction and is located on one side in the axial direction of the first current plate. Rigidity of the support portion is higher than rigidity of the first current plate.
A rotor includes stacked core plates, a hole, and a magnet inserted into the hole. A holding core plate has a through hole as part of the hole, a protrusion protruding inwardly from an inner surface of the through hole and being in contact with the magnet, and a displacement permission portion located in an opposite direction to a protrusion direction of the protrusion and permitting displacement of the protrusion in the opposite direction. The rotor includes at least one of a magnet-side chamfered portion in which the front side edge portion of the magnet is chamfered or a protrusion-side chamfered portion in which the tip end edge portion of the protrusion is chamfered. A sum of lengths of the magnet-side and protrusion-side chamfered portions is equal to or longer than a length of the protrusion in the protrusion direction as the rotor is viewed from the axial direction.
H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
H02K 15/03 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
A housing has an exhaust port and an intake port on one side and another side in a second direction, heat generators and fans arranged in a first direction, the fans on one side in the second direction of the heat generators, and an airflow restrictor between the heat generators and fans. The airflow restrictor includes a pair of guide portions arranged side by side with a first gap therebetween in the first direction. Each guide portion has an airflow guide surface facing the other side in the second direction and inclined toward the first gap. The housing includes a pair of first inner side surfaces facing each other in the first direction and a pair of second inner side surfaces facing each other in a third direction. A gap is between any one of the first inner side surfaces and the second inner side surfaces and the airflow restrictor.
A technology of starting power supply from an external device to a load device in a shorter period, after detection of connection between the external device and the load device, is provided. A control device includes a first connector attachable to and detachable from an external device, a power supply path to electrically connect a load device and the first connector, a load switch to switch between connection and disconnection of the power supply path, a protection circuit to protect the load switch from an inrush current to the load switch, the protection circuit including at least a capacitor, and a control circuit. The control circuit is operable to switch the load switch from disconnection to connection after a total time of a preset set time and a first time based on a charging time of the capacitor which has elapsed since connection of the first connector to the external device was detected.
A hybrid permanent magnet motor rotor rotates around a central axis, and includes: a rotor core provided with a plurality of magnet installation slots; and a plurality of magnet parts embedded inside a plurality of magnet installation slots respectively, wherein the rotor is provided with a plurality of first magnetic pole parts and a plurality of second magnetic pole parts, the magnetic poles of the first magnetic pole part and the second magnetic pole part are arranged in opposite and alternately in the circumferential direction, and the magnetic placement of the first magnetic pole part is different from that of the second magnetic pole part, the amount of magnets used in the second magnetic pole part is greater than that used in the first magnetic pole part.
Disclosed is a motor, which includes: a housing; a support plate fixed on the housing; an upper busbar holder holding the upper busbar and defined on the support plate; a lower busbar holder holding the lower busbar; one end of the upper busbar is connected to the lower busbar, and the other end of the upper busbar is connected to an external power supply; one end of the lower busbar is connected to the coil lead wire, and the other end of the lower busbar is connected to the upper busbar, the upper busbar holder has a first through-hole penetrating in the axial direction, the support plate has a second through-hole penetrating in the axial direction; the other end of the lower busbar passes through the first through-hole and the second through-hole, and is connected to one end of the upper busbar.
A rotor includes core plates, a hole, and a magnet in the hole. The core plates include a first core plate and a second core plate frontward of the first core plate. The first core plate includes a first hole, a first protrusion protruding inward of the first hole, and a first portion located in an opposite direction to a protrusion direction of the first protrusion as viewed from the axial direction and permitting deformation of the first protrusion in the opposite direction. The second core plate includes a second hole, and at least one of a recess recessed in the opposite direction and overlapping the first protrusion as viewed in the axial direction, or a second portion located in the opposite direction with respect to the first protrusion as viewed in the axial direction and permitting deformation of an inner surface of the second hole in the opposite direction.
H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
H02K 15/03 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
A motor includes a holder, a rotor inside the holder with a shaft rotatable about a central axis, first and second bearings rotatably supporting the shaft, and a stator radially outside the holder. The holder includes a first holder, and a second holder extending upward from an upper end of the first holder. The stator is fixed to an outer peripheral surface of the first holder, and an outer ring of the first bearing is fixed to a lower end of an inner peripheral surface of the first holder. A portion of an outer ring of the second bearing is fixed to an inner peripheral surface of the second holder. The second holder is radially spaced from the stator core. A radial thickness of the second holder is less than a distance between an outer peripheral surface of the second holder and an inner peripheral surface of the stator core.
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
F16C 19/08 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with two or more rows of balls
H02K 21/22 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
According to one aspect of the present invention, a plurality of heat elements, a plurality of heat sinks, at least one of which is attached to each of the heat elements, a cooling device that feeds a fluid in contact with a surface of the heat sink and promotes heat radiation of the heat sink by the fluid, and a heat pipe connected to the plurality of heat sinks are provided.
A drive apparatus includes a motor that has a motor shaft extending in an axial direction, a transmission mechanism that is connected on one side in the axial direction of the motor shaft, a lock mechanism that restricts driving of the transmission mechanism, a housing that houses the motor, the transmission mechanism, and the lock mechanism, an oil that is stored in the housing, and an oil passage that circulates the oil. The housing includes a motor room that houses the motor, a gear room that houses the transmission mechanism and the lock mechanism, and a partition that is provided between the motor room and the gear room. The oil passage includes a pump that pumps the oil in the oil passage, a first feed flow passage that feeds the oil to the motor, and a second feed flow passage that feeds the oil to the lock mechanism.
A motor includes a rotor rotatable in a circumferential direction around a center axis extending vertically, a stator to rotate the rotor, a lead wire connected to the stator, and a housing covering the rotor and the stator from a radially outer side. The housing includes a first housing located on a first side in an axial direction, and a second housing located on a second side in the axial direction. The first housing includes a wiring convex portion protruding toward the second side in the axial direction. The second housing includes a wiring recess that is recessed toward the second side in the axial direction and penetrates in a radial direction. The wiring convex portion is located in the wiring recess. The wiring convex portion includes a tip surface opposing the second side. The wiring recess includes a bottom surface opposing the first side.
An axial flux motor includes a rotor assembly and a stator assembly. The rotor assembly has magnets. The stator assembly has a circuit substrate, segmented iron cores, and a coil. The circuit substrate extends radially. The segmented iron cores are supported on the circuit substrate to be opposite to the magnet in the axial direction. Segmented iron cores arranged in the circumferential direction. A coil is sleeved on a segmented iron core. Holding seats of an insulating material correspond respectively to the segmented iron cores. A holding seat abuts with and covers a segmented iron core from both axial sides and the circumferential direction, and is used for winding the coil. The circuit substrate has slot holes. A slot hole is used for embedding and positioning a portion of a holding seat that protrudes more towards one axial side than the coil.
H02K 3/52 - Fastening salient pole windings or connections thereto
H02K 21/24 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
16.
POSITION ESTIMATION METHOD, POSITION ESTIMATION DEVICE, UNMANNED TRANSPORT VEHICLE, AND SEWING DEVICE
One aspect of a position estimation method of the present invention includes: a learning step of acquiring learning data necessary for estimation of a rotational position of a rotor on the basis of an input sensor signal; and a position estimation step of estimating the rotational position of the rotor on the basis of the input sensor signal and the learning data. The learning step is performed, thereby acquiring, as the learning data, data indicating the correspondence relationship between a segment number associated with a section included in each of a plurality of quadrants and a pole pair number representing a pole pair position. The position estimation step is performed, thereby determining an initial position of the rotor on the basis of the input sensor signal and the learning data.
H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
D05B 69/12 - Electrical or electromagnetic drives using rotary electric motors
G01D 5/245 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means generating pulses or pulse trains using a variable number of pulses in a train
H02P 23/14 - Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
A base plate is a portion of a housing of a disk driving device having a disk rotating with a rotation axis as a center, and is a cast product. The base plate has a bottom plate part and a peripheral wall part. The bottom plate part has a rectangular shape when viewed in an axial direction. The peripheral wall part extends from an outer peripheral edge of the bottom plate part toward a side of the axial direction to surround the periphery of the bottom plate part. A metal member embedded in the peripheral wall part is provided.
A pump includes an upper casing, a lower casing, a can, an impeller, and a motor. The upper casing includes a suction port through which a fluid is suctioned and a discharge port through which the fluid is discharged. The lower casing is located below the upper casing. The can is accommodated in the lower casing. The impeller is accommodated in the upper casing. The motor includes a rotor and a stator connected to the impeller. The rotor is accommodated in the can. The stator is located between an inner peripheral surface of the lower casing and an outer peripheral surface of the can. The can includes a protruding portion protruding in a radial direction from the outer peripheral surface. A lower end of the protruding portion and an upper end of the stator come into contact with each other.
A vibration motor includes a stator and a vibrator that is capable of vibrating in a first direction. The stator includes a coil and a housing. The coil opposes the vibrator in a second direction perpendicular to the first direction. The housing accommodates the coil and the vibrator. The vibrator includes a mass body, a magnet, and a sliding portion. The mass body extends in the first direction. The magnet is fixed to the mass body and opposes the coil in the second direction. The sliding portion is located on an end surface of the mass body in a direction intersecting the first direction, and slides on an inner side surface of the housing when coming into contact with the inner side surface of the housing during vibration of the vibrator.
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
A power converter to supply power to each phase of a three-phase motor includes a booster circuit connected to a DC power supply to boost an input voltage input from the DC power supply in response to a pulse width modulation boosting signal, an inverter connected to the booster circuit and including a three-phase switching circuit including switches, and an output connected to the three-phase switching circuit to supply power to each phase of the three-phase motor, and a controller to output the pulse width modulation boosting signal to the booster circuit and output the pulse width modulation boosting signal to the booster circuit when detecting that the booster circuit is in a boosted state.
H02M 7/5387 - Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
H02M 3/155 - Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
A cooling device includes a first surface portion thermally connected to one or more heating elements, a second surface portion opposed to the first surface portion, a flow path between the first and second surface portions and through which the cooling fluid flows, and a side wall connecting the first and second surface portions and extending along the direction in which the cooling fluid flows. A height of the side wall is reduced from the second surface portion side toward the first surface portion side at an outlet of the flow path. At least a portion of the second surface portion is missing in a portion of the side wall of which the height is reduced. A portion where the side wall is in contact with the first surface portion is superimposed on at least an entirety of the heating element closest to the outlet of the flow path.
A motor includes a bus bar assembly including a resin holder and a wire integrally provided in the resin holder. The wire is connected to an external power supply and a coil leading-out wire of the motor, the resin holder is provided with a positioning hole penetrating in an axial direction, and at least a portion of the wire is exposed from the positioning hole. The wire is integrally provided in the resin holder simply through the positioning hole, and thus the resulting bus bar assembly is low in cost and light in weight.
A vibrating motor includes a stationary portion, a movable portion to vibrate with respect to the stationary portion along a center axis extending in a vertical direction, and an elastic portion. The stationary portion includes a bearing portion supporting the movable portion to enable vibration along the center axis and having a tubular shape extending along the center axis, a coil directly or indirectly opposing at least a portion of the movable portion in a radial direction, and a housing having a tubular shape extending along the center axis. The housing houses the bearing portion, the coil, and the movable portion. The elastic portion is between the movable portion and the housing.
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
A rotor includes a rotor core having a hole, and a magnet inside the hole. A stator includes a stator core having an annular core back surrounding the rotor core and teeth extending inward from the core back and arranged at intervals in a circumferential direction, and coils attached to the stator core. The hole has an arc shape protruding inward. The magnet is in the hole and has an arc shape extending along the hole. The rotor core has cavity portions sandwiching the magnet. A curved outer surface of the hole is in close contact with a curved outer surface of the magnet at a portion closer to a center in the circumferential direction than an end portion in the circumferential direction. At least a part of the cavity portion extends to the outer side in the circumferential direction with respect to the center of a pole.
H02K 1/2753 - Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
A cooling assembly includes a radiator, a pump and a casing. The radiator includes a plurality of refrigerant flow paths and a plurality of ventilation paths. The radiator is operable to cool a refrigerant circulating in the plurality of refrigerant flow paths with air flowing through the plurality of ventilation paths. The pump is connected to the radiator to pressurize the refrigerant. The casing accommodates the radiator and the pump. The radiator is inclined with respect to a first surface of the casing. At least a portion of the pump is positioned between the radiator and the first surface.
A rotating electric machine includes a rotor rotatable about a central axis, and a stator positioned radially outside the rotor. The rotor includes a shaft axially extending about the central axis, rotor core portions fixed to an outer peripheral surface of the shaft and in an axial direction, a magnet held by each of the rotor core portions, and at least one spacer that is a non-magnetic body with a ring-plate shape about the central axis and is between the rotor core portions which are axially adjacent to each other. The spacer is smaller in outer diameter than the rotor core portion.
In a drive device, a first flow path of a fluid connects a gear accommodation portion and an inlet of a pump. A second flow path connects an outlet of the pump and one end of a third flow path via a cooler. The third flow path is inside a partition wall of a housing and intersects a rotation axis of a first shaft. A fourth flow path connects another end of the third flow path and one end of a fifth flow path. The fifth flow path is inside a gear side lid of the housing. Another end of the fifth flow path is connected to one end of a second shaft in an axial direction. One end of a sixth flow path is connected to another end of the third flow path. Another end of the sixth flow path is inside a housing tubular portion.
A cooling assembly includes a first heat exchanger and a first flow path pipe. The first heat exchanger comes into contact with a first heat generating component. The first flow path pipe is connected to the first heat exchanger. The first flow path pipe includes a first intermediate portion between one end of the first flow path pipe connected to the first heat exchanger and the other end of the first flow path pipe. The first heat exchanger includes a first fixing portion that fixes the first intermediate portion of the first flow path pipe. The first heat exchanger includes a metal cold plate in contact with the first heat generating component, and a synthetic resin cover on one side in a first direction with respect to the cold plate.
A cold plate includes an opposing portion, a cover portion, and a heat exchange chamber. The opposing portion opposes a heat generating component on one side in a first direction. The cover portion is arranged on another side of the opposing portion in the first direction. The heat exchange chamber includes at least the opposing portion and the cover portion to conduct heat from the heat generating component to a refrigerant through the opposing portion. The opposing portion includes a first cooling surface and a second cooling surface. The first cooling surface is provided on the one side in the first direction. The second cooling surface is provided on the one side in the first direction. The second cooling surface is spaced away from the first cooling surface in the first direction.
A cooling assembly is connectable with a cold plate that comes into thermal contact with a heat source, and includes a first manifold, a second manifold, and a radiator. The first manifold causes a refrigerant having circulated through a first pipe to flow out from outflow ports toward the cold plate. In the second manifold, the refrigerant flowing into inflow ports from the cold plate circulates through a second pipe. In the radiator, the refrigerant having circulated through the second pipe circulates through the flow paths arranged side by side at intervals. Each of the first and second pipes opposes a portion of the radiator in the first direction.
A stator includes star-connected coils of a plurality of phases. Each coil has bodies each configured by connecting conductors in series. Each body is wound while passing alternately through an M-th layer and an (M+1)-th layer of a slot. Each body includes: a first terminal; a first part wave-wound from the first terminal to one side in a circumferential direction; a folded portion connected to the first part on the one side; a second part wave-wound from the folded portion to the other side in the circumferential direction; and a second terminal connected to the second part on the other side. The first parts of the bodies of the same phase are sequentially arranged in slots arranged one by one on the one side. The second parts of the bodies of the same phase are sequentially arranged in slots arranged one by one on the other side.
An optical assembly includes a fixed body and a movable body supported swingably with respect to the fixed body, and the movable body includes an optical element including an optical axis, a holder into which the optical element is insertable, a contact portion in the holder and in contact with the fixed body, and an elastic body to press the contact portion toward the fixed body.
A motor includes a shaft, a base portion, a stator, and a rotor. The shaft extends along a central axis extending in an axial direction. The base portion extends in a radial direction on one axial direction side of the shaft. The stator is located in another axial direction with respect to the base portion and surrounds the shaft. The rotor is rotatable around the central axis. The rotor includes a rotor tube portion, a magnet, and a rotor flange portion. The rotor tube portion surrounds the stator. The magnet is opposed to the stator in the radial direction. The rotor flange portion extends in a radially outer direction from one axial end portion of the rotor tube portion. The rotor tube portion includes a yoke tube portion and a hub tube portion. The yoke tube portion is located on a radially inside surface of the hub tube portion.
A motor includes a rotor, a stator, a motor housing, an inverter, and an inverter case. The motor housing and the inverter case are arranged in contact with each other. The inverter case has a side wall surrounding the inverter when viewed from above. The side wall includes an upper side wall located in an upper part of the side wall, a step wall extending from a lower end of the upper side wall, and a lower side wall extending downward from an end edge of the step wall. The side wall has a plurality of outer ribs extending in the up-down direction. The outer rib is connected to the outer surface of the step wall and the outer surface of the upper side wall or the lower side wall located inside the inverter case relative to the step wall.
A heat radiator includes a plate-shaped base portion that extends in a first direction along the flowing direction of a refrigerant and in a second direction perpendicular or substantially perpendicular to the first direction and has a thickness in a third direction and a fin protruding from the base portion toward one side in the third direction. The fin includes a flat plate-shaped sidewall that extends in the first direction and the third direction with the second direction being a thickness direction. The sidewall includes a protrusion protruding in the second direction. A protrusion amount of the protrusion in the second direction is equal to or less than half of an interval between the sidewalls of the fin adjacent in the second direction. The protrusion includes an opposing surface opposing the flowing direction of the refrigerant. The opposing surface has a rectangular or substantially rectangular shape extending from the sidewall.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
F28F 3/04 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
A cooling structure includes a base with a plate shape, that extends in a first direction along a refrigerant flow direction and in a second direction perpendicular or substantially perpendicular to the first direction, a thickness of which extending in a third direction perpendicular or substantially perpendicular to the first direction and the second direction, and fins that protrude from the base to one side in the third direction, that extend in the first direction, and that are side by side in the second direction. Each of the fins includes a curved portion that is curved due to a convex portion, protruding to one side in the second direction, and a concave portion, recessed from the other side to the one side in the second direction, located at a same position in the first direction.
A liquid cooling jacket includes, with a direction along a direction in which a refrigerant flows being defined as a first direction, and a direction perpendicular or substantially perpendicular to the first direction being defined as a second direction, a refrigerant flow path having a width in the second direction and including a heat radiator on one side in the third direction, a bottom surface portion located on the other side of the refrigerant flow path in the third direction, and protrusions protruding from the bottom surface portion toward one side in the third direction and arranged in the first direction. With one side in the first direction being defined as a downstream side, the protrusions include a convex portion extending in the second direction and protruding toward the other side in the first direction.
F28F 13/12 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
F28F 3/12 - Elements constructed in the shape of a hollow panel, e.g. with channels
A cooling device includes a liquid cooling jacket and a heat dissipator including a plate-shaped base portion extending in a first direction along a direction in which a refrigerant flows and in a second direction perpendicular or substantially perpendicular to the first direction and has a thickness in a third direction, a fin protruding from the base portion toward, a top plate portion provided at the fin, and a bent portion bent toward the one side in the third direction at an end on one side in the first direction of the top plate portion, with the one side in the first direction being a downstream side. Between the liquid cooling jacket and the top plate portion, a gap in the third direction is provided, and the bent portion opposes the liquid cooling jacket.
F28F 3/04 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
F28F 3/12 - Elements constructed in the shape of a hollow panel, e.g. with channels
A cooling device includes a heat dissipator and a liquid cooling jacket. The heat dissipator includes a plate-shaped base portion that extends in a first direction along a direction where a refrigerant flows and in a second direction orthogonal to the first direction and has a thickness in a third direction, a fin that protrudes from the base portion to one side in the third direction, and a top plate portion provided to an end of the fin. The liquid cooling jacket includes a top surface located on one side of the top plate portion with a gap between the top surface and the top plate portion. Top surface recesses recessed from the top surface toward one side and located side by side in the first direction.
F28D 15/00 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls
F28F 13/12 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
F28F 3/02 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
A stator core includes teeth located in a circumferential direction and slots between the teeth and penetrating in an axial direction, and a wedge located radially inward of the slots. The stator core includes a groove portion at an end of each of the teeth in a circumferential direction. A portion of the wedge is located in the groove portion.
A motor assembly includes a motor, a board, and a housing. The housing includes a first housing including a board area, a second housing opposing the board area in a predetermined direction, and a seal sealing between the first housing and the second housing. The first housing includes an outer edge surrounding the board area and a recess recessed to an inward side from the outer edge along an inner periphery of the outer edge. The second housing includes a protrusion protruding to the inward side and located in the recess. The protrusion is an annular body partly including a discontinuity. The seal is located, at least partially, in the recess. The motor assembly further includes a blocking portion located in the first housing. The blocking portion blocks, at least partially, the discontinuity.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
H02K 11/30 - Structural association with control circuits or drive circuits
H02K 1/22 - Rotating parts of the magnetic circuit
A motor includes a rotor, a stator, a stator accommodating portion, a seal, and a lid. The stator opposes the rotor with a gap interposed radially inward. The stator accommodating portion accommodates the stator, includes an opening on one end surface in an axial direction, and has a tubular shape. The seal is filled in the stator accommodating portion. The lid covers the opening. The stator accommodating portion includes a cutout and a pullout piece. The cutout is recessed from one end in the axial direction to the other side in the axial direction, and a lead wire connected to the stator is pulled out. The pullout piece protrudes radially outward from a bottom of the cutout, and the lead wire is positioned between the lid and the pullout piece via an elastic portion on an end surface on one side in the axial direction of the pullout piece.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
H02K 11/33 - Drive circuits, e.g. power electronics
H02K 21/22 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
F04D 25/06 - Units comprising pumps and their driving means the pump being electrically driven
A drive apparatus includes a housing including a motor, a power transmission unit, a parking mechanism, and a gear accommodation portion. The parking mechanism includes a parking gear, a pawl, a transmission unit, and a sleeve. The transmission unit includes a cam rod and a cam attached to the cam rod to operate the pawl. The cam is guided by the sleeve. The gear accommodation portion has first and second housing members, a breather, and a dividing wall partitioning a space where the breather opens inside the gear accommodation portion. The second housing member is provided with a holding recess that opens to a first side in an axial direction and holds the sleeve. The first housing member is provided with a retaining wall that covers a surface facing a second side in the axial direction of the sleeve. The retaining wall is a part of the dividing wall.
A rotor including a pair of first magnets extending in directions away from each other in the circumferential direction as extending from the radially inner side toward the radially outer side when viewed in the axial direction and a second magnet at a circumferential position between the pair of first magnets and extending in a direction orthogonal to the radial direction when viewed in the axial direction. The rotor core includes a pair of holes extending in the axial direction or a pair of groove portions each arranged in the first pattern at the position of the first angle from the d-axis with the d-axis interposed therebetween on an outer peripheral side in the radial direction as viewed in the axial direction and a pair of holes extending in the axial direction or a pair of groove portions each arranged in the second pattern at the second angle.
A vibration motor includes a stationary portion and a movable portion to vibrate in a center axis direction with respect to the stationary portion. The stationary portion includes a coil to apply a driving force to the movable portion by energization, and a housing that accommodates the movable portion and the coil. The housing includes a notch recessed inward from an outer edge of the housing in the center axis direction. The notch includes a first notch recessed inward from an outer edge of the housing in the center axis direction, and a second notch recessed inward from an outer edge of the first notch in the center axis direction. A lead wire of the coil extends out of the housing through the notch.
H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
A heat radiating member includes a plate-shaped base portion and a plurality of fins protruding from the base portion toward one side. Assuming that a downstream side where the refrigerant flows is one side in the first direction, the fin has a flat plate-shaped sidewall. The sidewall is provided with a slit penetrating and a bent portion disposed on at least one of the one side in the first direction and the other side in the first direction of the slit and bent. The length of the bent portion is shorter than the first-direction length between the first-direction end of the slit facing the bent portion and the bending start position of the bent portion.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
A liquid cooling jacket includes a refrigerant flow path including a heat radiating portion on one side, a bottom surface located on the other side of the refrigerant flow path, and a protrusion protruding from the bottom surface toward one side. A first inclined portion is provided on the one side which is a downstream side of the protrusion. A first-direction length of the first inclined portion is longer than a height of the protrusion at a first-direction other end of the first inclined portion.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
A rotary electric machine includes a rotary electric machine main body, a board, a housing that includes a through hole and internally accommodates the rotary electric machine main body and the board, a connector that extends through the through hole and protrudes from the inside of the housing to the outside of the housing in a predetermined direction, a first seal portion that surrounds the connector and seals the through hole, and an elastic portion that comes into contact with the connector. The connector includes a connector terminal electrically connected to the board and a terminal holding portion that holds the connector terminal. The terminal holding portion is in contact with the housing through the elastic portion. The elastic portion is provided at a position different from that of the first seal portion.
H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
A vibration motor and a tactile device are provided. The vibration motor has: a stationary portion; a movable portion having a magnet and capable of vibrating with respect to the stationary portion along a central axis extending in an up-down direction; and an elastic member. The stationary portion has: a housing, disposed radially outside from the movable portion and having a cylindrical shape extending along the central axis; a top surface portion, disposed above the movable portion, fixed to the housing, and extended in a direction intersecting with the central axis; and a coil, capable of applying a driving force to the movable portion. The elastic member is disposed below the top surface portion and above the movable portion. The elastic member is fixed to the top surface portion and the movable portion and supports the movable portion so that the movable portion can vibrate along the central axis.
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
A control system includes a first control device and a second control device. The first control device can control a control target. The first control device includes a first control unit, a first communication unit, a first monitoring unit, and a first determination unit. The first control unit can control the control target. The first communication unit can communicate with the control target. The first monitoring unit monitors communication between the second control device and the control target. The first determination unit determines execution or standby of control of the control target by the first control unit on the basis of a monitoring result of the first monitoring unit. The second control device includes a second control unit and a second communication unit. The second control unit can control the control target. The second communication unit can communicate with the control target.
A blower includes a base, a motor attached to the base, a first impeller to be rotated by the motor, and a second impeller to be rotated by the motor and independent of the first impeller. The base includes an annular cover that covers at least a portion of the motor, a support that extends from an upper end of the cover, and a bottom extending inward from a lower end of the cover and to which the stator is fixed. The bottom includes a shaft hole to accommodate a shaft. The first impeller and the second impeller are fixed to an upper portion and a lower portion of a rotor, respectively. At least one of the first impeller and the second impeller is fixed to the shaft.
A motor includes a rotor and a stator. The rotor is rotatable about an axially extending central axis. The stator includes a stator core radially opposing the rotor. The stator core includes core back pieces and a teeth portion. The core back pieces are arranged circumferentially about the central axis. The teeth portion extends radially. The core back pieces which are circumferentially adjacent to each other are connected circumferentially via an end on a side of the core back pieces in a radial direction of the teeth portion.
H02K 5/04 - Casings or enclosures characterised by the shape, form or construction thereof
H02K 21/16 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
A motor unit includes a motor including a rotor to rotate about a motor axis, and a stator radially outside of the rotor, a reduction gear connected to the motor, a differential connected to the motor through the reduction gear, a housing including a housing space to house the motor, the reduction gear, and the differential, and an oil passage to lead an oil to the motor. The oil passage includes an electric pump and a cooler. The electric pump and the cooler are fixed to the housing. The electric pump includes a portion located vertically below the cooler.
A motor includes a rotor and a stator including a stator core including a core back and teeth, and a coil including a conductor including a wound portion wound around the teeth and an end extending from the wound portion. An axial position of the end is within a range from an end on one side to an end on the other side in an axial direction of the wound portion.
A motor module includes a motor and a casing including a partition wall. The accommodation space includes first and second accommodation spaces. The partition wall includes a base that partitions the first and second accommodation spaces in an axial direction. The base includes a wiring including a lead-out port and a guide groove extending from the lead-out port. The lead wire is led out from the lead-out port and located in the guide groove. The casing includes a tape and a seal. The tape covers at least a portion of the wiring from below. The seal is located in at least a portion of a space defined by the wiring and the tape.
A cooling device includes a first cooling section, a second cooling section, a first pump section, a second pump section, a branch section, a first flow path section, a second flow path section, a merging section, and a connection section. The branch section branches a refrigerant into two. The first flow path section connects the first cooling section and the first pump section, and one portion of the refrigerant passes through the first flow path section. The second flow path section connects the second cooling section and the second pump section, and another portion of the refrigerant passes through the second flow path section. The merging section merges the refrigerant having passed through each of the first flow path section and the second flow path section. The connection section connects the first and second flow path sections between the branch section and the merging section.
In a control device to control a motor in an electric power steering apparatus including the motor, processor executes, according to a program calculation of a target assist torque by performing proportional integral (PI) control based on a target steering wheel angle and a steering angle, and control of the motor based on the target assist torque. A gain of an integrator used for integral (I) control of the PI control is variable.
A blower device includes a pair of fans, a housing, and a lid. The pair of fans generates an airflow on one side in the axial direction along the central axis and is coaxially arranged. The housing has a tubular shape extending along the central axis, accommodates the pair of fans, and has two end surfaces opened in the axial direction. The lids cover axial end surfaces of the housing and provide ventilation. The lid includes an annular portion in contact with the inner peripheral surface of the housing and including a through hole penetrating in the radial direction. The housing includes an engagement protrusion that protrudes radially inward from the inner peripheral surface and engages with the periphery of the through hole.
A hand dryer includes a drying chamber, a blowing chamber, a duct, and a hose. The blowing chamber is below the drying chamber in a first direction along an up-down direction. The duct is cylindrical or substantially cylindrical, and connects a lower portion of the drying chamber with the blowing chamber. At least one hose is provided to connect an upper portion of the drying chamber with the blowing chamber. The upper portion of the drying chamber includes a drying-chamber opening, open in the first direction and communicating with an outside. In the drying chamber includes a blower, producing an airflow passing from bottom up through the hose. The duct includes a duct upper portion, a duct connection portion, and a duct lower portion. The duct upper portion, wider in the second direction, communicates with the lower portion of the drying chamber.
A parking mechanism includes an actuator having a manual shaft rotating around the first axis, a flange provided on an outer periphery of the manual shaft, a cam rod having a coupling portion coupled to the flange and a rod body moveable along a second axis orthogonal to the first axis with a movement of the flange, a coil spring attached to the rod body, a cam that is attached to the rod body and moves along the second axis by motion of the rod body transmitting via the coil spring, a pawl member having a meshing portion and operating with a movement of the cam, and a parking gear having a tooth portion with which the meshing portion meshes. The self-holding torque of the actuator is larger than the torque applied to the manual shaft at the time of maximum compression of the coil spring.
A centrifugal fan includes an impeller with a base expanded radially, vanes arranged circumferentially, extending from a radially inner side to a radially outer side, and ends thereof at one axial side being connected to the base, and a ring portion connecting ends of the vanes at the other axial side. The vanes include first vanes and second vanes, when viewed axially, the lengths of the second vanes are larger than the lengths of the first vanes, the first vanes and the second vanes are circumferentially arranged alternatingly. Gaps are provided between radially outer ends of the first vanes and the second vanes that are circumferentially adjacent to each other, and sizes of circumferentially adjacent ones of the gaps are different from each other.
A rotating electrical machine includes a rotor and a stator including an annular stator core including core pieces connected to each other in a circumferential direction. Each of the core pieces includes a core back piece extending in the circumferential direction and a tooth radially extending from the core back piece. At least one of the coupling portions between the core back pieces adjacent in the circumferential direction is a first coupling portion. Each of the pair of core back pieces connected in the circumferential direction via the first coupling portion includes a first surface and a second surface continuously connected to the first surface in the radial direction. In the pair of core back pieces connected in the circumferential direction, the first surface of one core back piece and the first surface of the other core back piece are in contact with each other.
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H02K 1/02 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the magnetic material
A motor assembly includes a motor, a controller on one side in an axial direction of the motor, and a motor cover between the motor and the controller in the axial direction. The controller includes a screw. The screw includes a head portion located on one side in the axial direction of the motor cover and a screw portion extending from the head portion to the one side in the axial direction. The motor cover opposes the head portion in the axial direction. A length of the screw in the axial direction is longer than a distance between the controller and the motor cover in the axial direction. The motor includes a pin extending to the one side in the axial direction. The motor cover includes a hole portion into which the pin is inserted. The screw is at a position shifted from the hole portion as viewed in the axial direction.
A control device that controls a control target including at least a motor in a steering mechanism including an input shaft to which a steering wheel is connected, an output shaft connected to the input shaft via a torsion bar, and the motor connected to the output shaft. The control device includes a reaction force controller to generate an input torque input to the control target based on a torsion bar torque generated in the torsion bar and to control a reaction force transmitted from the steering wheel to the steering person, and an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model. The assist controller is configured or programmed such that a transfer function of the control target is constrained by a transfer function of the nominal model in a frequency band.
A control device includes a reaction force controller to generate an input torque input to the control target and control a reaction force transmitted from a steering wheel to a steering person, an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model, and a state feedback circuit to feed back a state compensation value to the input torque based on the output of the control target. The assist controller is configured or programmed such that the transfer function of the control target is constrained by the transfer function of the nominal model in the frequency band where the gain in the gain characteristic of the complementary sensitivity function with respect to the modeling error between the control target and the nominal model is approximately 1.
A heat dissipator includes a first top plate at one side end of a third direction at a first fin(s). A second top plate is at one side end of a third direction at a second fin(s). The second fin(s) includes an opening open to one side in the third direction and located on the other side in the first direction relative to the second top plate. A liquid-cooled jacket includes a top surface that can oppose the first top plate and the second top plate in the third direction. A first gap between the top surface and the first top plate and a second gap between the top surface and the second top plate are narrower toward one side in the first direction.
A motor assembly includes a motor, a controller, a housing, and a seal. The housing includes a cover that covers the controller from one side in the axial direction. The cover includes a through-hole penetrating in the axial direction. The controller includes a connector portion extending through the through-hole and protruding to one side in the axial direction of the cover. The seal seals an area between an inner edge of the through-hole and the connector portion. An obverse surface on one side in the axial direction of the cover includes a groove portion recessed to the other side in the axial direction. One end of the groove portion communicates with the through-hole.
A control device includes a reaction force controller to generate an input torque input to a control target and control a reaction force transmitted to a steering person and an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model. The assist controller includes a high-pass filter with a first cutoff frequency, a low-pass filter with a second cutoff frequency higher than the first cutoff frequency, and a disturbance compensation value calculator. When a transfer function of the low-pass filter is Q(s) and a transfer function of the high-pass filter is HPF(s), a transfer function of a control target is constrained by a transfer function of the nominal model in a frequency band in which a gain in a gain characteristic of Q(s)·HPF(s) is 1.
A vibration motor includes a stator, a vibrator capable of vibrating in an axial direction, and an elastic member that connects the vibrator and the stator and is arranged on the axially upper side of the vibrator. The vibrator includes a mass body and a magnet member fixed to the mass body on the axially lower side of the mass body. The mass body includes a base portion extending in a radial direction and a column portion extending axially downward from the base portion. The magnet member has a hole portion recessed axially downward from an upper surface or penetrating through the magnet member. An outer edge of the hole portion is arranged radially outward of the column portion. The base portion faces an upper end of the coil in the axial direction.
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 1/34 - Reciprocating, oscillating or vibrating parts of the magnetic circuit
A motor includes a rotor and a stator, the rotor includes flux barriers. In a plane orthogonal to an axial direction, at least two flux barriers corresponding to each pole of the rotor are located entirely within an extending angle. A magnitude of the extending angle is determined by a number of poles of the rotor and phases of the motor. A center line of the extending angle is a q-axis of the rotor. A ratio between an area of the flux barrier entirely located within the extending angle and an area of all flux barriers corresponding to the pole is about ½ or more, and a ratio between an area of a radially innermost flux barrier entirely located within the extending angle and an area of a radially outermost flux barrier entirely located within the extending angle and a smaller one of the two areas is about 10% or less.
A vibration motor includes a stator, a vibrator capable of vibrating in a left-right direction, and an elastic portion that connects the vibrator and the stator. The vibrator includes a mass body including a groove recessed in an up-down direction, and a magnet fixed to the mass body inside the groove when viewed in the up-down direction. The stator includes a coil located inside the groove and opposing the magnet in the up-down direction, and a protector covering at least a portion of two ends of the coil in the left-right direction. The groove includes a first opposing surface. The protector includes a second opposing surface. The first opposing surface and the second opposing surface oppose each other in the left-right direction.
H02K 33/16 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
H02K 33/02 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
H02K 5/04 - Casings or enclosures characterised by the shape, form or construction thereof
An electric motor includes a housing with a tubular wall extending in an axial direction of the housing and a closures positioned at opposite axial ends of the tubular wall, a stator fixedly mounted inside of the housing, a rotor rotatably mounted inside of the housing, and a bearing rotatably supporting the rotor. At least one of the closures includes a rotor supporting portion. The rotor supporting portion includes a through hole configured to receive a portion of the rotor. The through hole is defined by a closed shape including at least three or more straight sides, and a radius of an inscribed circle of the closed shape of the through hole is larger than a radius of the portion of the rotor received in the through hole.
A semiconductor device includes a semiconductor element, a conductive member, a resin, and a cooling unit. The conductive member is joined to the semiconductor element. The resin seals a part of the semiconductor element and the conductive member. The cooling unit cools the conductive member inside the resin.
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
H01L 25/07 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices the devices being of types provided for in two or more different subgroups of the same main group of groups , or in a single subclass of ,
H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
A winding machine includes a winding core around which a winding is wound, a first winding jig and a second winding jig positioned with the winding core interposed therebetween in an axial direction of a central axis of the winding core, and a first gripper and a second gripper that are located on an outer side of the winding core in a radial direction around the central axis. An outer edge portion of the first winding jig in the radial direction and an outer edge portion of the second winding jig in the radial direction are located on an outer side, in the radial direction, from the winding core. Each of the first gripper and the second gripper includes a pair of rollers to interpose and grip the winding. At least one of the first gripper or the second gripper is rotatable about the central axis.
A motor includes a cylindrical rotor core, and a magnet group including first magnets and second magnets alternately arranged along a circumferential direction of the rotor core. A first magnetic flux line generated in the first magnets extends along a radial direction of the rotor core, and a second magnetic flux line generated in the second magnets is inclined with respect to the first magnetic flux line. The rotor core includes an inner portion located on a radially inner side of the magnet group and an outer portion located on a radially outer side of the magnet group. The outer portion includes a first iron core that covers the first magnet from the radially outer side, and a second iron core that covers at least a portion of the second magnet in the central axis direction of the rotor core from the radially outer side.
A motor includes a rotor rotatable about a central axis and a stator opposing the rotor in a radial direction. The rotor includes an inner core extending along the central axis, a magnetic pole portions located radially outward of the inner core and arranged along a circumferential direction, and a holder holding the inner core and the magnetic pole portions. At least a portion of the magnetic pole portions includes two layers including a magnet and an outer core located radially outward or inward of the magnet and extending along the central axis. The holder includes a flange portion located on a one axial side of the inner core and the magnetic pole portions.
H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
H02K 15/03 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
An inverter device capable of suppressing generation of vibration and a puddle in a top wall of an inverter case is provided. The inverter device includes an inverter and the inverter case that accommodates the inverter inside the inverter case. The inverter case has a top wall covering the inverter from above. The top wall has a first inclined surface descending from a top part on the upper surface of the top wall toward a first end part of the top wall, and a plurality of first rod-shaped ribs extending from the top part toward the first end part. The first rod-shaped rib has a site in which a protrusion height from the inclined surface increases toward the first end part.
H02K 5/24 - Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
H02K 11/33 - Drive circuits, e.g. power electronics
B60L 53/20 - Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
B60K 1/00 - Arrangement or mounting of electrical propulsion units
A stator core of a motor includes a disk portion and a pole-tooth yoke. The disk portion has a disk shape that extends in a radial direction around a central axis extending in a vertical direction. The pole-tooth yoke is located along a radially outer end of the disk portion. The pole-tooth yoke includes an annular portion and a pole tooth. The annular portion is connected to the radially outer end of the disk portion and extends in a circumferential direction. The pole tooth protrudes to one axial side from the annular portion. The disk portion and the pole-tooth yoke are defined by different members.
H02K 37/12 - Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
An estimation device that estimates a state of a device that detects a position of a rotating body includes a position sensor to output a detection signal that is a signal representing a detection result of a position of a magnet rotatable in conjunction with the rotating body according to a magnetic flux of the magnet, an extractor to extract a feature amount of the detection signal from the detection signal for each of the positions, and an estimator to derive an evaluation value representing a comparison result between a feature amount of the detection signal for each of the positions and a reference value for each of the positions, and to estimate a degree of change in sensitivity to detect the position based on the evaluation value.
H02P 6/16 - Circuit arrangements for detecting position
H02K 29/08 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates or magneto-resistors
G01D 5/14 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
A rotating electrical machine includes an electricity removal device in electrical contact with a shaft and a housing, a channel, a nozzle having a through hole communicating with an inside of the shaft, and a seal radially between the shaft and the housing. The shaft includes a hollow first portion and a second portion having a lid on a first side of the first portion and an extension extending from the lid to the first side. The extension axially passes through the through hole. The device is in contact with the extension on the first side relative to the through hole. The seal is on the first side relative to the nozzle and on the second side relative to the device. The shaft includes a channel communicating the first portion and the through hole. The channel opens toward an axial gap between the nozzle and the seal of the housing.
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
A rotating electrical machine includes a rotor, a stator, a housing, a bearing, an electricity removal device in electrical contact with a shaft and the housing, a nozzle supplying a fluid into the shaft, and a cover covering a part of the device. The shaft includes a hollow first member, a hollow second member coupled to a first side of the first member, and a channel communicating the inside and outside of the shaft. A part of the nozzle is inserted into the second member from an opening end. The housing has a peripheral wall surrounding the opening end. The bearing is held in the peripheral wall and is positioned away on the second side of the device. The cover is axially between the bearing and the device. The channel is opened in a portion positioned on the second side relative to the cover inside the peripheral wall.
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
H02K 5/14 - Means for supporting or protecting brushes or brush holders
H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
One aspect of a drive apparatus of the present invention includes a motor having a rotor that rotates about a motor axis and a stator that surrounds the rotor, a housing having a motor accommodating portion that accommodates the motor, a fluid stored in the housing, a flow path through which the fluid flows, and a pump that pressure-feeds the fluid in the flow path. The flow path includes a pipe-shaped intra-housing flow path that is disposed inside the motor accommodating portion and is provided with a feed hole for feeding the fluid to the motor, a pipe portion that is disposed inside the motor accommodating portion and relays between the pump and the intra-housing flow path, and an intra-side wall flow path that is provided in a wall portion of the housing and connects the pipe portion and the intra-housing flow path. The pipe portion and the intra-housing flow path are connected to each other by a coupling portion.
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 9/193 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with means for preventing leakage of the cooling medium
H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
A drive apparatus includes a motor, a transmission, an inverter, a housing accommodating the motor, transmission, inverter, and a fluid, a refrigerant for the inverter, a pump for the fluid, and a cooler that exchanges heat between the fluid and refrigerant. The housing includes first-third portions accommodating the motor, transmission and inverter, respectively, and a support portion. The second portion is on one side of the first portion in an axial direction. The support portion is radially outside in a circumferential direction, and is connected to an outer peripheral portion of the first portion and a bottom portion of the third portion. The support portion supports the pump and the cooler. Any one of the pump and the cooler is disposed on one side in the circumferential direction with respect to the support portion, and the other is disposed radially outside with respect to the support portion.
A motor has a rotor and a stator surrounding the rotor; a transmission mechanism having gears; a housing having a motor accommodating portion accommodating the motor, and a gear accommodating portion accommodating the transmission mechanism; a fluid stored in the housing; and a flow path through which the fluid flows. The housing has a side wall portion that defines an internal space of the motor accommodating portion and an internal space of the gear accommodating portion. The flow path includes an intra-housing flow path disposed in an internal space of the motor accommodating portion and provided with a feed hole for ejecting a fluid. A bearing holder that supports the shaft of the transmission mechanism via a bearing is provided on a gear facing surface of the side wall portion facing the transmission mechanism. The feed hole faces the bearing via an opening provided in the side wall portion.
One aspect of a drive apparatus of the present invention includes: a rotor having a shaft that rotates about a central axis; a stator disposed radially outside the rotor; a bus bar unit having a plurality of bus bars connected to the stator and a bus bar holder supporting the bus bars; a fluid feed portion disposed radially outside the stator and provided with a feed hole for feeding a fluid to the stator; and a housing that accommodates the rotor, the stator, the bus bar unit, and the fluid feed portion. The bus bar unit extends along the circumferential direction along the outer periphery of the stator and has an opening portion that opens toward the stator.
A drive apparatus includes a motor, a housing having a motor accommodating portion, and a flow path for a fluid. The housing includes first and second side walls opposite along an axial direction of the motor and extending along a plane orthogonal to the motor axis, and a peripheral wall surrounding the motor. The flow path includes a first intra-side wall path provided in the first side wall, a first intra-housing path connected to the first intra-side wall path and extending inside the motor accommodating portion along the axial direction, a second intra-side wall path connected to the first intra-housing path and provided in the second side wall, and a second intra-housing path connected to the second intra-side wall path and extending inside the motor accommodating portion along the axial direction. The first and second intra-housing paths are provided with feed holes for feeding fluid to the motor.
H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
H02K 5/128 - Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
A motor includes a rotor that includes a shaft located along a central axis extending in a vertical direction, a stator that includes coils and opposes the rotor in a radial direction, a casing that supports the rotor and the stator, and a terminal attached to the casing and electrically connected to lead wires extending from the coils. The terminal includes a lead wire terminal portion extending in a direction intersecting an axial direction toward the lead wires, and an external terminal portion that is electrically connected to the lead wire terminal portion and extends in the axial direction toward the outside of the casing.
A motor includes a motor control circuit having a ground terminal, and a current limiting part disposed on a path electrically connecting the ground terminal and an external ground terminal included in an external circuit disposed outside the motor.
H02K 11/01 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields
H02K 11/25 - Devices for sensing temperature, or actuated thereby
A motor includes a rotor that includes a shaft located along a central axis, a stator that includes coils and opposes the rotor in a radial direction, and a lead wire support portion that is above the coil and supports lead wires extending from the coils. The lead wire support portion includes a guide portion through which the lead wires extend and which guides the lead wires to an upper side of the lead wire support portion in an axial direction. The guide portion includes a tubular insertion portion which opposes the coil and into which the lead wires are inserted and a tubular lead portion which is above the insertion portion and from which the lead wires inserted from the insertion portion are drawn out.
H02K 3/52 - Fastening salient pole windings or connections thereto
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
A motor includes a rotor rotatable about a center axis extending vertically, a stator to rotate the rotor, and a housing covering the rotor and the stator from a radially outer side. The housing includes a first housing located on a first side in the axial direction, and a second housing located on a second side in the axial direction. The first housing includes a first opposing surface opposing the second housing in the axial direction, and a first wall portion extending from the first opposing surface to the second side in the axial direction. The second housing includes a second opposing surface opposing the first housing in the axial direction, a second wall portion extending from the second opposing surface to the first side in the axial direction, and a base portion holding the stator. The first wall portion and the second wall portion oppose each other in a radial direction.
An impeller for a centrifugal fan rotatable about a central axis extending in an axial direction includes a hub portion expanding radially outward about the central axis, and wings on a radially outer side of the hub portion. A cross-sectional shape of the wing in a circumferential direction is a wing shape.
A motor includes a stator, a rotor, a bus bar assembly, and a housing. The bus bar assembly includes an interface portion in which the power supply connection terminal is provided. The interface portion includes a first positioning portion. The housing includes a second positioning portion. The first and second positioning portions are positioned relative to each other by being respectively provided in predetermined relative positions. As a result, the relative position between the housing and the bus bar assembly can be accurately positioned, and the assembly accuracy of the motor can be enhanced.
A motor housing includes a bearing holder that holds a first bearing and accommodates a rotor and a stator. A second bearing is disposed inside a motor shaft at one axial end portion of the motor shaft and has lower electric resistance than the first bearing. The conductive member electrically connects the second bearing to a motor housing. The radially outer end portion of the second bearing is in contact with the inner peripheral surface of the motor shaft. The contact portion of the conductive member is in contact with the radially inner end portion of the second bearing. The fixed portion is fixed to the motor housing radially outward of the motor shaft. A bridge portion connects the contact portion and the fixed portion.
A motor control device includes a torque controller to operate based on a steering torque and to provide an input to a control target that is a motor, and a model following controller to generate a correction torque based on an output from the control target and to correct the input to the control target with the correction torque. A model following controller includes a high-pass filter with a first cutoff frequency and a low-pass filter with a second cutoff frequency larger than the first cutoff frequency. The model following controller is configured or programmed so that a transfer function of a control target is constrained to a nominal model in a frequency band in which a gain in a gain characteristic of Q(s)·HPF(s) is 1 where Q(s) is a transfer function of the low-pass filter and HPF(s) is a transfer function of the high-pass filter.
An optical assembly includes a movable body including an optical element, a fixed body that is located around the movable body and swingably supports the movable body, and a swing mechanism that causes the movable body to swing about a swing axis with respect to the fixed body. The swing mechanism is located in a first direction orthogonal to the swing axis, and the swing mechanism includes a magnet on the movable body and a coil on the fixed body. The fixed body includes a circuit board that is located on one side in the first direction of the fixed body and electrically connected to the coil, a reinforcing plate that is on the circuit board and includes a depression depressed toward another side in the first direction, and a magnetic body that is located in the depression and at least partially overlaps the magnet.
A motor includes a rotor, a stator, a bearing, a motor housing, a bearing holder, a bus bar assembly, and a circuit board. The bearing holder holds the bearing to cover the opening of the motor housing, and includes a holder protrusion. The holder protrusion is located radially outside the motor housing and includes an axially penetrating terminal through hole. The bus bar assembly includes a bus bar terminal and a bus bar holder. The bus bar terminal is connected to the bus bar, extends axially downward, passes through the terminal through hole, and protrudes axially downward from the lower surface of the holder protrusion. The circuit board includes a circuit terminal extending axially downward, passing through the terminal through hole, protruding axially downward from the lower surface of the holder protrusion, and connected to the bus bar terminal.
H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
98.
MOTOR CONTROL DEVICE, MOTOR CONTROL METHOD, MOTOR MODULE, AND ELECTRIC POWER STEERING DEVICE
A motor control device includes a torque controller to operate based on a steering torque and to give an input to a control target that is a motor, and a model following controller to generate a first correction torque based on an output from the control target. A model following controller includes a high-pass filter to remove a low frequency component from a first correction torque, a friction compensation calculator that is coupled in parallel to the high-pass filter to apply friction compensation to the first correction torque to calculate an estimated value of a mechanical friction torque, and an adder to add the estimated value of the friction torque to the first correction torque from which the low frequency component is removed by the high-pass filter to generate a second correction torque and feed back the second correction torque to an input to the control target.
B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
G05B 19/4155 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by programme execution, i.e. part programme or machine function execution, e.g. selection of a programme
99.
MOTOR CONTROL DEVICE, MOTOR CONTROL METHOD, MOTOR MODULE, AND ELECTRIC POWER STEERING DEVICE
A motor control device includes a model following controller to generate a correction torque based on an output from a control target that is a motor, and correct an input to the control target with the correction torque. A model following controller includes a high-pass filter with a first cutoff frequency and a low-pass filter with a second cutoff frequency larger than the first cutoff frequency, and is configured or programmed so that a transfer function of a control target is constrained to a nominal model in a frequency band in which a gain in a gain characteristic of Q(s)·HPF(s) is 1 where Q(s) is a transfer function of the low-pass filter and HPF(s) is a transfer function of the high-pass filter.
An optical assembly includes a holder on which an optical element that reflects light traveling to one side in a first direction to one side in a second direction intersecting with the first direction is mounted, a support that supports the holder, a fixed body that supports the support, a first swing mechanism that swings the support about a first swing axis with respect to the fixed body, a first magnet on any one of the holder, the support, and the fixed body, and a first magnetic body on another one of the holder, the support, and the fixed body. At least portions of the first magnet and the first magnetic body overlap each other when viewed from any one of the first direction, the second direction, and a third direction intersecting with each of the first direction and the second direction.
G02B 7/182 - Mountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors
G03B 5/00 - Adjustment of optical system relative to image or object surface other than for focusing of general interest for cameras, projectors or printers
G03B 17/12 - Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
G02B 27/64 - Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
patents
