Motor control apparatus for vector-controlling sensorless motor

Abstract

A motor control apparatus that vector-controls a sensorless motor, including: an estimating unit configured to obtain an estimated phase value by estimating a phase of a rotor in the sensorless motor; and a generating unit configured to generate, from the estimated phase value and a phase command value of the rotor, a phase conversion value that is a phase difference between a rotary coordinate system and a static coordinate system in the vector control. The generating unit is further configured to output the phase command value as the phase conversion value when the rotor is caused to start to rotate, and change the phase conversion value so that the phase conversion value approaches the estimated phase value from a predetermined timing after the rotor is caused to start to rotate.

Dependencies are inferred from the claim text.