| 摘要 |
PURPOSE: A motor driving system of hybrid vehicle and a controlling method thereof are provided to prevent an counter electro-motive force of the motor generated in case of a main relay off from applying to an electric-powered air-conditioner inverter, and to control an auxiliary relay in case of a failure of a DC converter. CONSTITUTION: The motor driving system of hybrid vehicle is composed of first and second motors(M1,M2); first and second inverters(1,2); a battery(B) for a DC power supply; a voltage converter(3); a first and second main relays(SR1,SR2); a DC converter(4); and an electric-powered air-conditioner inverter(7). The first and second inverters drive-control the respective first motor and second motors. The voltage converter boosts or decompresses a direct current voltage from the battery for the DC power supply, and supply boosted or decompressed direct current voltage to the first and second inverters. The first and second main relays are connected between the battery for the DC power supply and the voltage converter. The DC converter and the electric-powered air-conditioner inverter are connected between the battery for the DC power supply and the first and second main relays. |
