Harmony Optimization of Physical Design and Control Strategy of Switched Reluctance Motor

Vibration and acoustic noise are the important reasons for switched reluctance motor to be unacceptable in variable speed drive market. To optimize the physical structure of the motor and to choose the appropriate control strategies are the two conventional ways to reduce the noise. In this paper, a new method is proposed to combine these two optimization ways together: harmony optimization of switched reluctance motor. Especially, the 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 and turn-on, the turn-off angle which affect the power factor strongly. Based on the same cooper losses, the mathematics analysis and finite element simulation are carried out. The best control strategy and corresponding turn-on and turn-off angles are calculated with reference to a suitable motor dimension. The simulations show that the harmony optimization will reduce the vibration and torque ripple in a large extent without extra power losses.