Research On Switched Reluctance Motor Drive Controller Of Electric Vehicles

Electric vehical which is economical, safe and environment protected and iscalled “Green” vehical. Electric driving system is a key for electric car andachieves much attention and studies from the researchers at home and abroad.Because of the relative simple structure, low cost, high efficiency, safe, reliableand flexible control, switched reluctance motor and its driving system arebecoming hotspots for electric driving system other than other kinds of motors.Firstly, this dissertation introduces the development and applications ofelectric driving system at home and abroad. Due to the demand of electric drivingsystem and the characteristic of various motors, take the switched reluctancemotor driving system as the research objects. Then, taking a deep research in thestructure, principle of operation, basic equation, linear model of switchedreluctance motor. After studying control strategy of switched reluctance motordriving system, combine the Fuzzy control and traditional PID control and adjustthe parameters on-line, thus, widely velocity regulation is realized.In Matlabenvironment, establish the simulation model for control strategy optimized, andthe results of simulation show that the feasibility of optimized method. Aftertheoretical researching, take switched reluctance motor controller for furtherstudy. Set the5kW and12/8poles of switched reluctance motor as the researchobject. The power convertor circuits, driving circuit and the control circuit baseon DSP2812are designed. Considering the bad wording conditions of thecontroller, auxiliary and isolated power and different kinds of protection circuitare well designed. Thus, the ability of anti-interference and reliability of thesystem are greatly enhanced. In software aspects, the structure of software andsubroutine are well designed. Finally, make a serious of experiment on theplatform of switched reluctance motor driving system and the results shows thatthe motor is running steadily with low torque ripple, and the response of velocity is fast. Therefore, the switched reluctance motor driving controller in this paperis well designed and feasible.