Sensorless Switched Reluctance Motor

As the representative of modern electrical machines, switched reluctance machine(SRM) combines the low-cost strong structure of reluctance machine with excellent controllability of modern power electronics technique and microprocessor control technique. It runs bases on rotor position information offered by mechanical sensor, which increases cost and component count. Thus, it is necessary to research a sensorless drive system for SRM.This paper mainly focused on the design of a sensorless drive system for SRM based on the Texas Instruments TMS320F2407 DSP by detecting the change of the derivative of the phase current.Firstly, this paper summarized the development and application of SRM, analyzed the framework of SRD and the method of sensorless system.Secondly, this paper summarized the running mechanism of SRD and analyzed how to control this system, and also compared each control methods.Thirdly, this paper described various methods of sensorless system, and simulated them in MATLAB.Fourthly, this paper designed a sensorless drive system based on TMS320F2407 DSP. In this chapter, the hardware design and the software design were all listed clearly.Finally, experiments have been done on this practical system. The experimental results validated and deepened the conclusions drawn from theoretical research and gave some advice on further research of sensorless system for SRM.