Research On Control System Of Switched Reluctance Motor Drive For Electric Vehicles

Switched reluctance motor is a doubly salient motor without the windings for rotor. Its numerous advantages including simple structure, wide speed range, higher reliability, various controllable parameters make it become one ideal choice for electric vehicles drive motors. In this paper, 12/8 three-phase switched reluctance motor is selected as the control objective. Through rational design of hardware and software programs, the paper completes the debugging of the whole drive system. Including the design of power converter structures, the main controller board and monitoring circuits, the hardware program of switched reluctance motor drive system is described. It can acquire data and monitor signal which ensures the reliable operation. In the low-speed range, based on the outer speed loop and the inner current loop control strategy, current chopping control can limit the winding current, reduce torque ripples, and ensure stability performance. In the high-speed area, the current chopping and angle position control all are adopted. By adjusting the position of the turn-on angle and turn-off angle, the motor achieves the given speed number. ds PIC30F6010 A and EPM570T100C5 N are the cores of the main controller. Combining with appropriate peripheral circuits, they can accomplish the data input and output functions. According to various control strategies for different speed zone, the software programs are compiled which include interrupt program, display program and communications programs.Finally, the experimental platform to verify the feasibility of the above control strategy is established. The waveforms are gathered and analyzed with various load and current demands. It also tests the capabilities of acceleration performance, deceleration performance and anti-interference capability.