Multi-mode operations of DC-excited memory motors under flux regulation

The concept of memory is due to the fact that the magnetization level of permanent magnets (PMs) in the motor can be easily regulated by a current pulse, and then be memorized automatically. By incorporating this memory concept into the hybrid-field doubly-salient PM (DSPM) motor, the DC-excited memory motor can offer effective and efficient flux control. The purpose of this paper is to newly propose and implement multi-mode operations of the DC-excited memory motor. Namely, by regulating the magnetization level of the PMs, the DC-excited memory motor can operate at various modes, including the normal DSPM mode and the normal switch reluctance mode. Both simulation and experimental results are given to verify the validity of the proposed multi-mode operations of the motor.