MOTOR CONTROL DEVICE

摘要

In order to reduce undesired sound caused by circular ring oscillation in the diameter direction of the stator by an electromagnetic force, electromagnetic force drift memory 13 stores a drift information of the electromagnetic force to cause the circular ring oscillation of the stator 21, and this electromagnetic force drift information is read out according to the position information &thetas;, and it is supplied to a correction coefficient generating circuitry 12. Correction coefficient generating circuitry 12 corrects the amplitude component of the activation current wave form by forming correction coefficient beta (t) of the activation current so as to cancel the electromagnetic force harmonic component in a diameter direction as a main reason of the circular ring oscillation of the stator 21. <IMAGE>