Patent ID: 8212512

Claim:
A vehicle generator motor comprising: a generator motor that is connected to an internal combustion engine and has plural sets of three-phase windings; plural sets of inverter portions connected to the respective sets of the three-phase windings; and a control circuit portion for controlling the inverter portions in accordance with the operation state of the generator motor, the control circuit portion judging initial combustion of the internal combustion engine and judging whether a variation value of an output torque of the generator motor exceeds a predetermined value when the generator motor is operated as a motor to start up the internal combustion engine, wherein when the control circuit portion judges that the initial combustion of the internal combustion engine occurs and the variation value of the output torque exceeds the predetermined value, the control circuit portion controls the inverter portions so as to stop armature current flowing in at least one set in plural sets of three-phase windings.