开关磁阻电机（SRM）有着简单的结构，其控制方式灵活、多样。它在工作过程具有安全性能好、效率很高、速度调节良好等优点，所以其应用越加广泛，并且关注度也变高。另一方面，由于开关磁阻电机在运转时转矩脉动比较大，这源于其定、转子都为凸极结构和它独特的工作原理。为此，本文主要从控制方式入手，研究了提高其转矩性能的方法。 开关磁阻电机的双凸极结构使其在绕组换相区的转矩脉动最为严重，因此本文研究了时刻都以转矩为直接控制对象的直接瞬时转矩控制方法（DITC）。此外，又在传统的三电平功率变换器的基础上加以改进，将驱动电路优化到四电平控制上，根据DITC的控制思想，设计出了四电平下的转矩滞环控制器。对整个控制系统外加速度调节的环节，采用模糊自适应PI控制器结构作为速度环的控制，达到即控制转矩、又控制转速的目的，构成一个SRM的四电平DITC控制系统。仿真结果表明DITC方法能时刻将SRM的转矩波动抑制在一定的上、下限之间，SRM的转矩脉动有效减小、提高了运行性能。 本文完成了SRM控制系统的软硬件研究设计和调试工作。系统实验平台包括以TMS320F2812为控制器核心的控制电路，SRM的功率变换驱动电路、电流检测电路、转速/位置检测电路等。软件包括有电机绕组驱动控制子程序、转速/位置检测程序、电流检测等相关子程序和控制主程序。实验完成了开关磁阻电机的电流斩波控制方式和PWM控制方式，对实验平台建立起到了较好的根基。

Switched reluctance motor (SRM) has a simple structure, flexible control, and the system is reliable and efficient, etc., its application and the extent of concern are increasingly widespread. But, its torque ripple is relatively large when running because of the unique doubly salient structure and its works. This paper researches the ways to improve the performance of switched reluctance motor torque from the control methods. Doubly salient structure of switched reluctance motor made the torque ripple most severely in winding phase-change region, so this paper researched direct instantaneous torque control (DITC) method, it is at all times in order to direct control torque. Moreover, according to the three-level power conversion, improved the drive circuit to the four-level control. This paper designed the four-level hysteresis torque controller according to the principle of DITC. Added to the system to speed control, and fuzzy adaptive PI controller structure as the speed control loop that controls the torque, but also control the speed, constitute a four-level DITC system of SRM. Simulation results show that the method can always DITC torque controlled within certain limits hysteresis range, effectively reducing the switched reluctance motor torque ripple and improve operational performance. This paper completed the hardware and software design and debugging switched reluctance motor drive system. Experimental platform includes a controller core TMS320F2812, SRM drive power conversion circuit, the current detection circuit, the speed / position detection circuit. Software includes motor winding drive control, speed / position detection, current sensing, etc., associated with subroutines and the main control program. Experiments done CCC mode of switch reluctance motor, has laid a good foundation for further work.