Research On Switched Reluctance Motor Drive System And The Realized In Electric Vehicles

With shortage of petroleum resources and increased environmental pollution, the development of electric vehicles has been highlighted. Currently, many motor were used in electric vehicles, Switched Reluctance Motor(SRM) seems to be one of the best solution of electric vehicles driving motor due to its good performance such as simple structure, low-cost, efficient system, multi-controllable parameters, start-up currents is small but start-up torque is high. It has great potential for development.Research history on SRM is accompanied by the development of the electronics and microelectronics technology. Switched Reluctance Motor Drive system(SRD) is a new type of speed regulating system, which is compose of double-salient reluctance motor, power converter, position sensor and controller. Though it has good performance in speed adjustment, the basic theory and control strategy on SRM are still imperfect because there are many questions such as high electrical torque ripple, high noise, the position sensors which increase the complexity of structures and reduce the reliability, and these issues are subject to further research and good solution.Based on the results of the predecessors and all kinds of reference, this paper introduced the current application and development of electrical driven motor in EV. Comparing with other driven systems, the advantage and disadvantage of SRD was analyzed, which demonstrated that it is suited for use as driving system in EV.The developmental direction and the pop issue of SRD were put forward in this paper,and the four compositions were introduced and the performance characteristics of SRD was analyzed. Then this paper built a linear model in detail based on Matlab/Simulink. Two nonlinear simulation methods are designed by curve fitting method and ANFIS which seem simply and right in the simulation experiment. Based on the model different control strategies also were realized in detail such as Chopped Current Control (CCC), Angular Position Control (APC), amplitude-change CCC and PI control. A simple torque sharing function(TSF) method and a TSF controller were designed which decreases torque ripple effectively. At last a controller of a 4-phase 8/6-pole SRM was developed based on TMS320LF2407 DSP, which makes full use of the abundant resources of DSP, adopts IPM as the power switch and designs a new power topology for a 4-phase SRM. The current feedback circuit, position sensor and fault protection...