WIRELESS POWER TRANSMISSION SYSTEM

摘要

In a wireless power transmission system that transmits power from a power transmitting device to a power receiving device by electric field coupling, the power receiving device includes a power receiving module having a circuit for rectifying and smoothing an AC voltage which is generated between the active electrode and the passive electrode, a secondary battery, and a heat conducting plate that transfers heat which is generated in the power receiving module in power transmission from the power transmitting device to the power transmitting device. The power transmitting device includes a power transmission module which converts an input DC voltage to an AC voltage and applies the AC voltage between the active electrode and the passive electrode and a heat conducting plate which makes contact with the heat conducting plate and receives heat from the power receiving device.

主权项

1. A wireless power transmission system comprising:
a power receiving device including:
a power receiving-side active electrode;a power receiving-side passive electrode coupled to a reference potential; a power receiving-side circuit that rectifies and smoothes an alternating-current (AC) voltage that is generated between the power receiving-side active electrode and the power receiving-side passive electrode; a battery that accumulates power supplied from the power receiving-side circuit;a load that is driven by power from the power receiving-side circuit or by power from the battery when the power receiving-side circuit does not supply power;a heat sink that dissipates heat from the power receiving-side circuit; anda power receiving-side heat conductor that transfers heat generated in the power receiving-side circuit during power transmission to the power receiving device; and a power transmitting device including:
a power transmitting-side active electrode that opposes the power receiving-side active electrode when the power receiving device is placed on the power transmitting device;a power transmitting-side passive electrode that opposes the power receiving-side passive electrode when the power receiving device is placed on the power transmitting device;a power transmitting-side circuit that converts an input direct-current (DC) voltage to an AC voltage and applies the AC voltage between the power transmitting-side active electrode and the power transmitting-side passive electrode; anda power transmitting-side heat conductor that receives heat from the power receiving-side heat conductor when the power receiving device is placed on the power transmitting device.