Patent ID: 8405335

Claim:
A rotary electric machine control system including a rotary electric machine and an inverter interposed between a battery and the rotary electric machine to control a current that flows through the rotary electric machine, comprising: a battery electric power calculation unit for calculating battery electric power that is supplied from the battery; a torque limitation unit for limiting an output torque of the rotary electric machine; and a battery electric power abrupt variation estimation unit for estimating that the battery electric power is in an abrupt variation state in which the battery electric power is varying abruptly on the basis of at least one of a battery electric power variation rate being equal to or more than a battery electric power abrupt variation threshold and a rotary electric machine speed variation rate being equal to or more than a rotary electric machine speed abrupt variation threshold, wherein the torque limitation unit changes, in the case where the battery electric power abrupt variation estimation unit estimates that the battery electric power is in the abrupt variation state, a mode of limitation of the output torque from a mode of limitation of the output torque used in a non-abrupt variation state in which the battery electric power is not varying abruptly.