Harmony Optimization Design of Switched Reluctance Motor Drive

SRM has become an attractive alternative in adjustable speed drive due to its simplicity in both motor construction and power converter, and vibration that causes acoustic noise in SRM have generated intense interest from the time it became commercially competitive with dc and ac drives. Basically, there are two conventional ways to reduce the noise: optimize the physical structure of the motor, or, choose appropriate control strategies. In this paper, a new method is proposed to combine these two optimization ways together: harmony optimization of SRM. Physical design is mainly aiming at the back iron thickness and the air gap length of the motor. Control optimization is about the control mode, turn-on and the turn-off angle which affects the power factor strongly. Based on the same cooper losses, the mathematics analysis and finite element simulation are carried out. The results show that the harmony optimization will reduce the vibration and torque ripple in a large extent without extra power losses.