SYNCHRONOUS MOTOR CONTROL DEVICE AND METHOD FOR OPTIMIZING SYNCHRONOUS MOTOR CONTROL

摘要

A synchronous motor control device, includes a coordinate transformation portion for coordinate transforming motor currents applied to respective three phases of a synchronous motor into a d-axis, corresponding to a direction of a magnetic field generated by a permanent magnet arranged at a rotor of the synchronous motor, and a q-axis orthogonal to the d-axis, a current command calculation portion for calculating a d-axis current command and a q-axis current command from a target torque, a voltage command calculation portion for calculating a d-axis voltage command and a q-axis voltage command, an inverse coordinate transformation portion for inversely coordinate transforming the d-axis voltage command and the q-axis voltage command into three-phase voltage commands, and a torque ripple estimating portion for estimating a torque ripple and feed-forwarding the estimation results to the current command calculation portion or the voltage command calculation portion.