Control device for three-phase alternating current motor

Abstract

A control device, which is configured to control current of a three-phase alternating current motor by d-q axis control, includes a q-axis current controller configured to receive, as one input, an acceleration torque command value τf calculated based on a position command value X, and output a controller output voltage Δeq to be added to a q-axis voltage command value vq*. The q-axis current controller calculates, based on the acceleration torque command value τf, an acceleration q-axis current command value iqf*, which is a current command value corresponding to the acceleration torque command value τf, and adds, to the controller output voltage Δeq, a value obtained by multiplying the acceleration q-axis current command value iqf* by an IP coefficient KIP indicating a ratio of switching between PI control and I-P control and by a q-axis proportional gain Gqp.

Dependencies are inferred from the claim text.