WIRELESS POWER TRANSMISSION SYSTEM

Abrégé

This wireless power transmission device is provided with: a power transmission circuit for transmitting power for a load device to a wireless power receiving device; a signal transmission circuit for transmitting a control signal for the load device to the wireless power receiving device; a signal receiving circuit for acquiring an estimated value of a power receiving level indicating the level of power that is transmitted from the wireless power transmission device and received by the wireless power receiving device; and a control circuit. The control circuit periodically assigns, to each wireless power receiving device, a plurality of time slots for wirelessly transmitting power to the each wireless power receiving device from the wireless power transmission device. When the power receiving level becomes smaller than a threshold value in a first time slot assigned to a certain wireless power receiving device, the control circuit extends a second time slot assigned to the same wireless power receiving device and preceding or following the first time slot.

Classes IPC  ?

• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices