Permanent magnets synchronous motors: a general approach for cogging torque suppression

摘要

The minimization of the torque ripple in permanent magnets synchronous motors is achieved either by a special motor design or by an adequate control of the driver. In both cases, the driver or the motor choice is made so that both elements are complementary. The presented approach yields either appropriate current shapes to drive a given motor without torque ripple or appropriate back EMF shapes for a given current or voltage supply. The torque components due to the interaction between the magnets and the stator slots are taken into account.