开关磁阻电机（SRM）具有结构简单、成本低、控制灵活等优点，由其构成的调速系统具有交、直流调速系统所没有的优势，在各个领域中有着广阔的应用前景。SRM是通过定子各相绕组轮流开通与关断使的转子转动，因此位置检测是开关磁阻电动机驱动的重要组成部分，传统的位置传感器使得SRM的应用范围受到了限制，影响了电机控制系统的可靠性，提高了成本，所以研究无位置检测技术是开关磁阻电机系统研究的重要课题之一。 本文分析了开关磁阻电机的结构和运行原理，在简化线性电感模型的基础上，借助Matlab/Simullnk软件，建立了开关磁阻电机控制系统的仿真模型。利用直接转矩控制方法，减小了转矩脉动。在状态观测法的基础上，给出了一种基于滑模观测器的无位置检测技术，该方法通过测量电机终端的电压、电流，便可实现电机的转子位置。完成了基于滑模状态观测的电机控制系统的设计。通过仿真分析验证了该方法具有较强的鲁棒性和一定的可行性。并且以TMS320F2812 DSP为核心控制器，设计了SRM控制电路，包括主电路控制模块、功率变换器、电压检测模块、电流检测模块及位置速度检测模块。 利用CCS3.3开发环境设计了整个控制系统的软件，应用C语言编写了电流斩波起动程序，直接转矩程序及其它相关的子程序，实现了电机的电流斩波起动，为更进一步研究打下了基础，具有一定的应用价值。

The Swithed Reluctance Motor(SRM) has been wiedly applied in many fields because of the advantages of simple structure, flexible control strategy and low cost.Switched Reluctance Drive System(SRD) is a new drive system with high potential after the application of AC or DC motor drive system.The running of SRM is controlled under exciding different phase windings by appropriate sequence,thus the position detection is a very important part of the drive system.But the conditional position-sensor causes the SRM performance to the certain limitation,which rises the cost and adds the complexity of SRD.As a result,the sensorless for control of SRM has become one major direction in the study of SRD. The thesis analyzes the structure and operatiion principle of SRM,using the linear inductance model of SRM, a simulation model of SRD was built up.And based on the direct torque control of motor, reduced torque ripple in SRD.Based on state observer method,the sliding model observer(SMO) was prosed for sensorless detection,which only needs the measurement of phase voltage and current to estimate motor position.Based on designing of the control system with sliding model observer,simulation results demonstrate the applicability and robustress.A core controller based on TMS320F2812 DSP was introduced in this paper, and the designed SRD circuit includs the main circuit control module、power converter、voltage detection module、current detection module and speed detection module. This paper also describes the design of the whole system software. Control system software worked in the CCS3.3 environment, used C language to compile the current chopper procedures, direct torque control procedures and other related subprogram,it has realized the motor current chopper start and has laid the foundation for further research.