Modelling and simulation of switched reluctance motor. drive

Abstract

Switched reluctance (SR) n1otor has a nutnber of protnising features like simplicity ruggedness, reliability and costeffectiveness.It offers relatively high torque-on-inertia ratio, is capable of running at high speeds and has high efficiency.In all, it has a good potential for motion-control applications. However, the need of a dedicated power converter,higher torque ripple and higher audible noise are its major lin1itations. In this paper, the constructional featuresof SR tnotor are briet1y discussed. With experirnentally obtained nux-linkage and static torque characteristics, a suitablemodel of the motor is achieved. Dynatnic simulation of the n1otor using titne-step integration tnethod is discussed.Desired control paratneters TaN, T oFF and I*, for different speeds and torques are obtained through open loop sitnulation.The torque ripple for different combinations of the above paran1eters is illustrated. Closed loop dynatnic perfonnanceis studied in si1nulation and results of current, torque, and speed wavefonns are presented. The torque-speed envelopeof the SR n1otor is found through sin1ulation and the results for the same are presented.