Patent ID: 7332882
Filing Date: 2008-02-19
Classification: B60L,H02J,H02M,Y02T

Abstract:
1. A motor drive device equipped with an AC motor, an inverter, a rechargeable battery, a charge power supply, and an inverter controller and capable of doubling as a device to control charging of the rechargeable battery, wherein the inverter controller of the motor drive device comprises a connection judging section for judging whether the charge power supply is connected, and a mode switch controller for switching between a Motor Drive mode which converts a DC voltage of the rechargeable battery into an AC voltage by the inverter and supplies the AC voltage to the AC motor and a Battery Charge mode which supplies the DC voltage from the rechargeable battery to the inverter through a winding of the AC motor and drives semiconductor switching devices to charge the rechargeable battery; the connection judging section inputs a voltage value detected on the terminals connected to the charge power supply, compares the detected voltage value by a predetermined voltage value, and outputs whether the charge power supply is connected; and the mode switch controller inputs the output from the connection judging section and switches between the Motor Drive mode and the Battery Charge mode after a predetermined mode transition period.