NON-CONTACT POWER TRANSMISSION AND RECEPTION DEVICE

PROBLEM TO BE SOLVED: To provide a non-contact power transmission and reception device ensuring good power transmission and reception efficiency, while preventing backflow of a current, due to received voltage (power) at power reception, to the transmission power supply side.SOLUTION: A non-contact power transmission and reception device includes a power transmission and reception coil for transmitting or receiving power, a resonance capacitance constituting a resonance circuit with the power transmission and reception coil, a power transmission and reception circuit outputting a transmission power to the power transmission and reception coil, and receiving reception power therefrom, a power supply for supplying transmission power to the power transmission and reception coil via the power transmission and reception circuit, a switch circuit for switching transmission power supply via the power transmission and reception circuit, and output of the reception power, and a control circuit for controlling the switch circuit. The switch circuit is configured to prevent input of the reception power to the power supply.SELECTED DRAWING: Figure 1 【課題】受電時の受電電圧（電力）による電流が送電電源側に逆流することを防止しつつ送受電効率のよい非接触送受電装置を提供する。【解決手段】電力を送電または受電する送受電コイルと、送受電コイルと共振回路を構成する共振容量と、送受電コイルへ送電電力を出力するとともに送受電コイルから受電電力を入力される送受電回路と、送受電回路を介して送受電コイルに送電電力を供給する電源部と、送受電回路を介した送電電力の供給と受電電力の出力とを切り替えるスイッチ回路と、スイッチ回路を制御する制御回路と、を備え、スイッチ回路は、受電電力の電源部への入力を防止する構成とする。【選択図】図１