CONTACTLESS POWER TRANSFER SYSTEM

A half-bridge inverter 20 is used for a high frequency alternating current power supply to be connected to a primary side of a contactless power transformer 30, and a voltage-doubler rectifier 40 is used to convert a secondary-side alternating current output of the contactless power transformer 30 into a direct current. The alternating current output voltage of a half-bridge inverter drops a half of a full-bridge inverter. However, since the voltage-doubler rectifier boosts the output voltage to two times as high as the output of a full-wave rectifier, a voltage ratio between the input voltage to the inverter and the secondary-side direct current voltage becomes almost the same as a whole. The voltage of the contactless power transformer drops to approximately a half of the conventional voltage so that the contactless power transfer system is advantageous in terms of insulation and reducing ferrite loss.