Research and implementation of a new controller for Switched Reluctance Motor

Abstract

Switched Reluctance Motor (SRM) has the advantages of simple structure, firmness and durability and good speed regulation performance. It is widely used in industrial production. However, the control strategy of SRM and the corresponding hardware and software are the key to ensure its high-quality operation. In this paper, the power converter is designed as a three-phase inverter bridge circuit and adopts a unique symmetrical and uneven excitation mode of 720 º electrical angle one cycle. The hardware and software system of closed-loop control based on AT89C52 single chip microcomputer and speed detection signal is further designed. The excitation sequence of each phase winding is controlled by the main switch circuit through PI regulation and PWM technology, The speed regulation control of SRM is realized. The experimental results show that the design can use a lower current value to make the SRM obtain a larger average torque, increase the motor efficiency, and is conducive to compensating the disadvantage of high phase current peak during SRM operation.