Patent ID: 6611127
Filing Date: 2003-08-26
Classification: B60K,B60L,Y02T

Abstract:
A drive circuit for a motor/generator, having an inverter and a direct current power source supplying electrical power to the inverter, the motor/generator being driven by the inverter and having a first rotating electrical machine which mainly functions as a motor and a second rotating electrical machine which mainly functions as a generator, the drive circuit comprising:a booster circuit for boosting a voltage of the direct current power source, the booster circuit comprising a first switching power device connected to a plus side of the direct current power source, a second switching power device connected between a minus side of the direct current power source and the first switching power device, a diode connected through an anti-parallel connection to the first and second switching power devices, and a condenser connected to both ends of the first and second power devices, wherein the booster circuit is disposed at a position where a current for rotating the first rotating electrical motor cancels out with a current generated by the second rotating electrical machine.