| 摘要 |
An object is to provide a control apparatus for an AC motor capable of suppressing electrical oscillation of an LC filter circuit even when the magnitude of a torque command is small or close to zero and stably driving and controlling the AC motor. A control apparatus for an AC motor that drives and controls the AC motor 6 includes a damping control unit 40 that calculates a damping manipulated variable that suppresses a fluctuation in the capacitor voltage, wherein the damping control unit 40 calculates a fluctuation rate of the capacitor voltage, calculates the damping manipulated variable based on the fluctuation rate and a predetermined value that is set as a value in a predetermined range around a maximum torque of the AC motor, generates a torque command or a current command of the AC motor 6 based on the damping manipulated variable, and controls an inverter 4 so as to change a current flowing in the inverter 4 in a fluctuation suppressing direction with respect to a fluctuation in the capacitor voltage based on the torque command or the current command. |
