A Study On Micro-step Position Servo Control System Of Switched Reluctance Motor

With the development of technique of power electronic,microprocessor and motor, motor drive systems which are satisfied with incremental motion appear incessantly. Analyzing these motor drives with step motion theory will yield new incremental motion control systems. In this paper Switched Reluctance Motor (SRM) is extended to incremental motion control. Based on the alternative step motion theory and the characteristics of SRM, a new kind of SRM for position servo system is proposed. Detailed theoretical and simulating analyses are also presented. At the same time, the software and hardware of SRM position servo system are designed. The paper principally alms at the weakness which SRM produces excessive vibration and torque ripple in low speed area. Then a novel micro-step control strategy is presented. This method can not only reduce the torque ripple of SRM but also increase position control precision. According to position servo control of SRM, a new kind of SRM electrical actuator is developed successfully. Theoretical analysis results have shown that the new electrical actuator has simple structure and excellent performance.