Patent ID: 8378601

Claim:
A control apparatus for a permanent magnet synchronous motor including: a d/q-axis current command generator that generates current commands on a d-axis and a q-axis from a torque command externally input; and a current controller that generates, according to proportional integral control, voltage commands on the d-axis and the q-axis for causing currents on the d-axis and the q-axis actually flowing to the permanent magnet synchronous motor to be matched with current correction commands on the d-axis and the q-axis, which are deviations between the current commands on the d-axis and the q-axis and current correction amounts on the d-axis and the q-axis corresponding to the current commands, the control apparatus comprising a torque correction circuit that generates a torque correction command from a current phase of the current correction commands on the d-axis and the q-axis and the torque command and supplies the torque correction command to the d/q-axis current command generator instead of the torque command.