Fuji Electric Co., Ltd.

Japan

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Date
2024 May 1
2024 (YTD) 2
2023 2
2022 4
2019 1
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IPC Class
H02K 41/02 - Linear motors; Sectional motors 6
B61D 19/02 - Door arrangements specially adapted for rail vehicles for carriages 2
H01F 1/12 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials 2
H01F 7/02 - Permanent magnets 2
B60J 5/06 - Doors arranged at the vehicle sides foldable 1
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Status
Pending 8
Registered / In Force 7
Found results for  patents

1.

DIAGNOSTIC APPARATUS, DIAGNOSTIC SYSTEM, AND DIAGNOSTIC METHOD

      
Document Number 03217700
Status Pending
Filing Date 2023-10-25
Open to Public Date 2024-05-11
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor Yukawa, Shinji

Abstract

A diagnostic apparatus acquires time series data during a time period in which a door is closed, upon occurrence in a condition in which a door-side pin in a train carriage is maintained in a state where a locking device does not restrict the pin from moving downward, the time series data including first time series data of a position of the door, and second time series data of an output of a detector configured to detect the presence and absence of the fall of the pin. The diagnostic apparatus diagnoses, based on the acquired time series data, an abnormality in a positional relationship between the pin and a car-side recess in an opening and closing direction of the door that is in a locked state.

2.

PERMANENT FIELD MAGNET AND LINEAR MOTOR

      
Document Number 03197764
Status Pending
Filing Date 2023-04-24
Open to Public Date 2024-01-04
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Akiyama, Terukazu
  • Imamori, Satoshi

Abstract

A permanent field magnet for a linear motor is provided. The permanent field magnet includes a plurality of permanent magnets arranged along a moving path of a mover; a first member that includes a soft magnetic material and is disposed between and in contact with mutually adjacent ones of the plurality of permanent magnets; and a suppressing portion configured to suppress application of a magnetic field from an armature to each of the permanent magnets.

IPC Classes  ?

  • H02K 41/02 - Linear motors; Sectional motors
  • H01F 1/12 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
  • H01F 7/02 - Permanent magnets

3.

LINEAR MOTOR

      
Document Number 03203910
Status Pending
Filing Date 2023-06-19
Open to Public Date 2023-12-28
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Akiyama, Terukazu
  • Imamori, Satoshi

Abstract

A linear motor includes an armature and a field magnet that are disposed to face each other and configured to be subjected to relative movement. The armature includes a plurality of windings that are arranged along a direction of the relative movement. Each of the windings is wound around a first iron core. The field magnet includes a plurality of permanent magnets that are disposed to face both sides of the armature in a direction perpendicular to the direction of the relative movement, and are arranged along the direction of the relative movement. A ratio of a dimension of the first iron core to an arrangement pitch of the windings in the direction of the relative movement is in a range from 0.1 to 0.35.

IPC Classes  ?

4.

MAGNETIC FIELD APPARATUS AND LINEAR MOTOR

      
Document Number 03182689
Status Pending
Filing Date 2022-11-24
Open to Public Date 2023-07-24
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Akiyama, Terukazu
  • Imamori, Satoshi

Abstract

A magnetic field apparatus includes a main magnet that generates a magnetic field with respect to an armature, a member made of a soft magnetic material and disposed adjacent to an end surface of the main magnet on a side opposing the armature, an auxiliary magnet that increases a magnetic flux of a magnetic pole of the main magnet on the side opposing the armature and disposed adjacent to the main magnet and the member in a relative moving direction between the magnetic field apparatus and the armature, and a restricting part that restricts the magnetic flux of the main magnet passing through an end surface of the member along a third direction that is perpendicular to both a first direction in which the main magnet and the armature oppose each other, and a second direction corresponding to the relative moving direction between the magnetic field apparatus and the aLmature.

IPC Classes  ?

  • H01F 7/08 - Electromagnets; Actuators including electromagnets with armatures
  • H01F 1/12 - Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
  • H02K 41/02 - Linear motors; Sectional motors

5.

MAGNETIC FIELD GENERATOR, METHOD FOR MANUFACTURING MAGNETIC FIELD GENERATOR, AND LINEAR MOTOR USING MAGNETIC FIELD GENERATOR

      
Document Number 03146568
Status Pending
Filing Date 2022-01-24
Open to Public Date 2022-09-09
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Imamori, Satoshi
  • Akiyama, Terukazu

Abstract

A magnetic field generator (1) including: a yoke (2); and a plurality of main magnetic pole magnets (3) and a plurality of secondary magnetic pole magnets (4), the main magnetic pole magnets and the secondary magnetic pole magnets comprising a rare earth sintered magnet, having magnetic pole orientations different from each other by substantially 90 , and being alternately arranged in a linear Halbach magnet array without gaps and fixed to the yoke, wherein near contact surfaces of the main magnetic pole magnets and the secondary magnetic pole magnets, a grain boundary diffusion layer (6, 8) is formed in which at least one of Dy or Tb being heavy rare earth elements or a compound of at least one of the Dy or the Tb is diffused into internal grain boundaries from the contact surfaces.

6.

ARMATURE, LINEAR MOTOR, METHOD OF MANUFACTURING ARMATURE

      
Document Number 03146632
Status Pending
Filing Date 2022-01-25
Open to Public Date 2022-09-08
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Imamori, Satoshi
  • Akiyama, Terukazu

Abstract

An armature includes a plurality of cores arranged in a straight line and discontinuous with each other, a plurality of coils wound around each of the cores, and a holding section configured to hold the cores. At least one of the cores include division cores separate from each other and arranged in an axial direction thereof. Each of the division cores has a flange at a. contact surface thereof that is in contact with the holding section, and at least a portion of the contact surface protrudes toward the holding section to form the flange.

IPC Classes  ?

  • H02K 41/02 - Linear motors; Sectional motors
  • H01F 7/16 - Rectilinearly-movable armatures
  • H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines

7.

LINEAR MOTOR

      
Document Number 03122978
Status Pending
Filing Date 2021-06-23
Open to Public Date 2022-02-28
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Akiyama, Terukazu
  • Imamori, Satoshi
  • Konno, Yusuke

Abstract

A linear motor includes an armature that includes a coil and a core made of a soft magnetic material, and a field magnet that includes a permanent magnet generating a magnetic field for the armature. One of the armature or the field magnet is a mover and the other of the armature or the field magnet is a stator, and the stator includes a first section and a second section. The armature and the field magnet are arranged such that the mover is interposed between the first and second sections, and at least one of the armature or the field magnet is configured to have an asymmetrical property between first and second magnetic actions. The first magnetic action is caused by the permanent magnet between the mover and the first section, and the second magnetic action is caused by the permanent magnet between the mover and the second section.

IPC Classes  ?

  • H02K 41/02 - Linear motors; Sectional motors
  • H02K 1/06 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the shape, form or construction

8.

PERMANENT FIELD MAGNET, MANUFACTURING METHOD, AND LINEAR MOTOR

      
Document Number 03122976
Status Pending
Filing Date 2021-06-23
Open to Public Date 2022-02-21
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Konno, Yusuke
  • Imamori, Satoshi

Abstract

A permanent field magnet is disposed between two armatures parallel to each other, and includes a first field magnet section facing a first armature of the two armatures, and a second field magnet section facing a second armature of the two armatures that is different from the first armature. The first field magnet section includes a first main magnet that generates a magnetic field for the first armature and a first auxiliary magnet that increases magnetic flux of a magnetic pole of the first main magnet. The second field magnet section includes a second main magnet that generates a magnetic field for the second armature and a second auxiliary magnet that increases magnetic flux of a magnetic pole of the second main magnet. The first main magnet and the second main magnet, or the first auxiliary magnet and the second auxiliary magnet, are permanent magnets magnetized in the same direction.

IPC Classes  ?

9.

DOOR OPENING/CLOSING DEVICE

      
Document Number 03040746
Status In Force
Filing Date 2017-11-02
Open to Public Date 2019-05-02
Grant Date 2022-07-05
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Fujita, Kenji
  • Kitabata, Atsushi

Abstract

A door opening/closing device is described that makes a person easily pull out an obstacle. A door opening/closing device includes: an opening/closing bar attached to one of doors, the opening/closing bar being configured to be actuated by an electric motor, the doors being opened and closed by the opening/closing bar being moved between an opened position and a closed position; a door closing state detecting part configured to detect whether the doors are in a closed state; a locking device configured to lock and unlock the doors; a lock pin configured to be moved to a locked position or an unlocked position by the locking device; an engaging member attached to the opening/closing bar, the engaging member including an engaging part configured to engage with the lock pin moved to the locked position, in a state in which the closed state is detected by the door closing state detecting part; a first spring provided between the opening/closing bar and the engaging member; and a locking control unit configured to issue a lock instruction to the locking device to cause the locking device to lock the doors, in a case in which the opening/closing bar is moved to the closed position by the electric motor and in which the closed state is detected by the door closing state detecting part.

IPC Classes  ?

  • B61D 19/02 - Door arrangements specially adapted for rail vehicles for carriages

10.

POWER CONVERSION DEVICE

      
Document Number 02903362
Status In Force
Filing Date 2014-05-13
Open to Public Date 2014-12-04
Grant Date 2022-05-10
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor Takubo, Hiromu

Abstract

Semiconductor switching elements are individually inserted between a plurality of power conversion units provided in parallel with each other through a DC link portion and a DC power supply unit for supplying DC power to each of the power conversion units to restrict the DC power supplied to the respective power conversion units. control circuit monitors a short-circuit current occurring in each of the power conversion units and turns off the semiconductor switching element connected to the power conversion unit where the short-circuit current flows to stop the power supplied to the power conversion unit.

IPC Classes  ?

  • H02M 7/48 - 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

11.

MOVING BODY DRIVE APPARATUS

      
Document Number 02842510
Status In Force
Filing Date 2014-02-11
Open to Public Date 2014-08-28
Grant Date 2020-04-28
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor Shiroma, Takahiro

Abstract

A moving body drive apparatus with a shortened length in a direction of movement, drives a moving body in a linear direction by a drive source. The moving body includes: a relay rotating body movable in a travel direction of the moving body by the drive source, is rotatable in a direction perpendicular to the travel direction and relays drive power to the moving body; a rotation converting body stationary relative to the moving body, engages with an outer circumference of the relay rotating body, and converts movement of the relay rotating body, into rotation; and a conveyance linear body coupled to the moving body engages with the outer circumference of the relay rotating body and moves in the travel direction due to rotation of the relay rotating body while moving in the travel direction.

IPC Classes  ?

  • E05F 11/54 - Man-operated mechanisms for operating wings, including those which also operate the fastening for doors
  • B60J 5/06 - Doors arranged at the vehicle sides foldable
  • B61D 19/02 - Door arrangements specially adapted for rail vehicles for carriages

12.

ULTRASONIC FLOWMETER AND ULTRASONIC FLOW RATE MEASUREMENT METHOD

      
Document Number 02557432
Status In Force
Filing Date 2005-02-24
Open to Public Date 2005-09-09
Grant Date 2012-09-04
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Kishiro, Masami
  • Hagiwara, Kouji
  • Yamamoto, Toshihiro
  • Yao, Hironobu
  • Ohmuro, Yoshinori
  • Hirayama, Noritomo

Abstract

A flowmeter includes: a transit time method unit having a sensor and a reception signal amplification control unit and a flow rate calculation unit which are connected to the sensor via a sensor selector switch; a pulse Doppler method having a reception signal amplification control unit and an integration calculation unit which are connected to the sensor; a transmission/reception timing control unit common to them; a measurement method selection control unit for controlling switching between the transit time method unit and the pulse Doppler method unit, and parallel operation; and a measurement value output selector switch for selecting the output of the transit time method unit and the pulse Doppler method unit. That is, the single flowmeter can perform flow rate measurement by the transit time method having no restriction on the measurement range as well as by the pulse Doppler method having an upper limit of the measurement range but enabling a highly accurate measurement.

13.

WEDGE AND WEDGE UNIT FOR USE IN ULTRASONIC DOPPLER FLOW METER

      
Document Number 02494509
Status In Force
Filing Date 2005-01-27
Open to Public Date 2005-07-30
Grant Date 2013-05-21
Owner FUJI ELECTRIC CO., LTD. (Japan)
Inventor
  • Hirayama, Noritomo
  • Yamamoto, Toshihiro
  • Yao, Hironobu
  • Onodera, Takuya

Abstract

A wedge unit according to the present invention is used for an ultrasonic Doppler flow meter, being mounted on the outer wall of a pipe in which a fluid flows, supplying an ultrasonic wave to the fluid, receives the reflected wave and supplies the reflected wave to a flow rate calculation unit, comprises a wedge with one surface thereof being mounted on a part of the outer circumference of the pipe and on another surface thereof being equipped with an ultrasonic oscillator that generates the ultrasonic wave in response to an electric signal and receives the reflected wave; and an ultrasonic wave attenuation unit being mounted on the outer circumference of the pipe so as to include a position where an ultrasonic wave injected from the ultrasonic oscillator into the pipe by way of the wedge first reaches the outer wall of the pipe after being reflected by the inner wall thereof.

IPC Classes  ?

  • G01F 15/00 - MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME - Details of, or accessories for, apparatus of groups insofar as such details or appliances are not adapted to particular types of such apparatus

14.

DIODE FAILURE DETECTING DEVICE IN ROTARY RECTIFIER

      
Document Number 01204820
Status In Force
Filing Date 1983-06-20
Grant Date 1986-05-20
Owner FUJI ELECTRIC CO., LTD. (Canada)
Inventor
  • Nakamura, Keijiro
  • Tsuji, Nobuhiko
  • Iike, Masanori

Abstract

DIODE FAILURE DETECTING DEVICE IN ROTARY RECTIFIER ABSTRACT OF DISCLOSURE A diode failure detecting device in a rotary rectifier having fuses provided respectively for phases and connected in series to rectifying diodes. Light emitting diode circuits in one embodiment are connected in parallel respectively to the fuses which are arranged on the peripheral surface of a rotor. The LED's preferably emit light in different emission spectra when the respective fuses are blown out. An optical fiber sensor is provided on the side of a stator, for detecting when the LED's emit light and a photo-electric converter converts optical signals applied thereto through the optical fiber sensor into electrical signals through optical spectral discrimi- nation separately according to the phases of the rectifier. A logic circuit determines the flow of over-current in the rectifying diodes from an output of the photo-electric converter. In a second embodi- ment, flags on the fuses are optically scanned to determine the presence of a blown fuse. By determin- ing the absence of a pulse or determining pulse width, the detection of a flag is made. If the reflectivi- ties of the flags vary, identification of a particular blown fuse can he made.

IPC Classes  ?

  • G01R 31/00 - Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
  • H02H 7/125 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from norm for rectifiers for static converters or rectifiers for rectifiers

15.

TUBULAR PART WALL THICKNESS MEASURING DEVICE

      
Document Number 01210529
Status In Force
Filing Date 1983-07-19
Grant Date 1986-08-26
Owner
  • FUJI ELECTRIC CO., LTD. (Canada)
  • FUJI FACOM CORPORATION (Canada)
Inventor
  • Kaneko, Kazuyuki
  • Watanabe, Kiyoo
  • Monno, Asao

Abstract

FO-7-32013M/KK/83. ABSTRACT OF THE DISCLOSURE A tubular part wall thickness measuring device includes a radiation source having a plurality of radia- tion sources disposed in a line. The radiation passes through a collimator to provide parallel radiation beams which pass transversely through a tubular part to a radi- ation detector. The length of the radiation source and the radiation detector are greater than the diameter of the tubular part to be measured so that the radiation passes through an entire section of the tubular part so that the average wall thickness of the tubular part can be determined from the amount of attenuation of radiation which is detected by the detector.

IPC Classes  ?

  • G01B 15/02 - Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring thickness