Digital Nonlinear Control Strategy Research For Switched Reluctance Motor

Switched reluctance driver (SRD) is an advanced electromechanical device. It attracts more and more attentions for its excellent performance and great potential commercial value. The paper mainly simulates the SRD model, improves the hardware of digital system and programmes the control software.At first, the paper does two-dimensional finite element simulation for 30kW 12/8 SRM. The static electromagnetic data is obtained to describe the motor's electromagnetic characteristic. Based on the characteristic, nonlinear model is established. Moreover, phase-current and sum-torque are simulated in control of "current PWM" and "voltage PWM".In order to improve the performance of SRM and minimize ripple of torque, the two control strategies, fuzzy logic current compositing control and instantaneous torque control, are studied. Moreover, the paper combines the two control strategies with the established SRD nonlinear model, and simulates the whole system.Pointing to the project "Driving System of SRM for Electric Vehicle", the paper improves the control board of SRD, designs necessary hardware and man-machine interface circuit, programmes control software to realize the basic function such as controlling, displaying and communicating.Finally, some experiments, which include motor driving experiment when with and without load, communicating experiment for battery management system, are done to validate if control hardware and software are appropriate. Furthermore, analyzing and conclusion are done for the waves of motor in experiments. The paper points the shortage of the work and what will be done next in the end.