Patent ID: 6930460
Filing Date: 2005-08-16
Classification: B60L,H02H,Y02T

Abstract:
1. A load driver, comprising: an AC motor; a first power supply outputting a first voltage which is a DC voltage; a second power supply outputting a second voltage which is a DC voltage; an inverter receiving said first voltage, converting said first voltage into an AC voltage, outputting said AC voltage to said AC motor, and driving said AC motor; a converter stepping down said first voltage, outputting the step-down voltage to said second power supply and charging said second power supply; and a control circuit, wherein when said first voltage is lower than a predetermined voltage, said second voltage is supplied to a coil of said AC motor, and said control circuit controls said inverter to step up said second voltage by said coil of said AC motor and said inverter, outputs the step-up voltage to said first power supply and charges said first power supply, and stops said converter,and said AC motor includes a plurality of coils each having one end and the other end, respective one-ends of all of said plurality of coils being connected together to a neutral point of said coils, and said second voltage is supplied to the other end of one of said plurality of coils.