Patent ID: 7187088
Filing Date: 2007-03-06
Classification: B60L,B62K,B62M,Y02T

Abstract:
1. A power supply apparatus for an electric vehicle which includes a vehicle power supply for driving an electric motor and other vehicle equipment comprising: intermediate voltage application means for setting a line defined by an intermediate voltage between a drive voltage and a ground voltage of said vehicle power supply as a ground line for said other vehicle equipment, and power supply means for producing a voltage to be applied to said other vehicle equipment based on the drive voltage of said vehicle power supply and the intermediate voltages, wherein said power supply means includes a power supply circuit operatively connected to an oscillator, a photo-coupler including a photo-diode and a photo-transistor, FETs Q wherein when a voltage is supplied from a controller to the power supply circuit, the oscillator is rendered operative with a voltage from the power supply circuit, the oscillator outputs a pulse waveform turning on and off the FET Q