An Investigation of Vibration Reduction in SRM Using Improved Active Cancellation Method

In this paper, a voltage PWM control strategy for reducing acoustic vibration and noise in Switched Reluctance Motor (SRM) is proposed and investigated. At low speed, a sudden change of voltage control causes a sudden change in the attraction force resulting in vibration of SRM. The proposed technique is a five-stage voltage Pulse-Width Modulation (PWM) control method that reduces the rate of change of voltage during the current commutation period. The comparative simulation results show a significant reduction in vibration, while effectively maintain the other control objectives in desired speed and desired phase currents with slight increase of copper losses by 1.16%.