Patent ID: 9203335
Filing Date: 2015-12-01
Classification: H02P

Abstract:
1. A control device configured to control an electric motor by vector control, the control device comprising: a current control unit configured to calculate a voltage command value used to drive the electric motor, on the basis of a state quantity for voltage command value calculation and a current detection value detected from the electric motor, the state quantity for voltage being calculated from a torque command value used to drive the electric motor; and an over-modulation processing unit configured to (i) determine whether the electric motor is stable or unstable in an over-modulation state, on the basis of a phase of the voltage command value and at least one state quantity for control which is used to control the electric motor, wherein the at least one state quantity for control includes an inductance value of the current control unit and an inductance value of the electric motor, and (ii) drive the electric motor on the basis of a result of the determination, wherein the over-modulation processing unit includes: