A novel four layer switch reluctance motor with high torque and ripple reduction

High acoustic noise and vibration is one of the main drawbacks, which have limited the wide application of switched reluctance machine (SRM). Therefore, many studies have been carried out to reduce the acoustic noise and vibration of SRM. This paper presents a simple, practical and analytical method to increase considerably torque, reduce ripple and decrease acoustic noise with changing in configuration. The proposed motor Consists of four magnetically independent stator and rotor sets (layer). Each layer works exactly in a complementary way and helps to another layer in an accurate method to give a suitable torque output. In this motor each layer produce high torque, therefore based on a special switching method, at a time a layer which is in its pick torque characteristic is active and other layers don´t produce any torque, and it continues periodically and four layers produce a high torque with decrease in ripple and vibration can result reduction of acoustic noise. So when four layers work complementary with a special switching method it can generate high torque that work fluently. Simulation results prove this claim very well.