Motor control device

Abstract

In Steps S54 to S55, when a change rate Δτ* of a torque command value to a motor 10 is equal to or greater than a predetermined value, a frequency switching speed Δfc of a carrier frequency fc is set based on the number of rotations N of the motor 10 so that a response frequency ωfc of a frequency switching speed Δfc of the carrier frequency fc becomes faster than a response frequency ωACR of a current control unit 70. In Steps S54 and S56, when the change rate Δτ* of the torque command value to the motor 10 is less than a predetermined value, the frequency switching speed Δfc of the carrier frequency fc is set based on a torque command value τ* to the motor 10 and the number of rotations N of the motor 10 regardless of the response frequency ωACR of the current control unit 70. According to the invention, it is possible to suppress the torque fluctuation at the time of switching the carrier frequency while preventing the response deterioration of the motor control device, and it is possible to stably drive the motor in a wide operating range.

Dependencies are inferred from the claim text.