摘要开关磁阻电机（Switched Reluctance Machine，简称SRM）调速系统传统的单极性控制策略，功率模块不具有通用性，且电机运行转矩脉动大，不利于大规模投入市场。本文提出一种基于三相全桥逆变器功率模块的双极性控制策略，以解决上述通用性和优化转矩脉动问题。82930

首先，本文介绍SRM国内外发展情况和研究方向，论述SRM的结构和驱动原理，提出本课题研究的双极性控制策略。

其次，基于MATLAB/Simulink搭建了SRM调速系统的非线性模型，分析了双极性控制方式下，开通关断角、PI参数调节对电机性能的影响，并通过dSPACE软硬件平台直接导入模型验证了双极性控制的可行性。

最后，根据仿真算法编写DSP程序，通过一台4KW，12/8极SRM进行实验验证，分析了双极性控制的SRM调速系统性能。实验结果表明双极性控制可以有效减少转矩脉动。 

毕业论文关键词  开关磁阻电机 三相全桥逆变器 双极性控制

毕业设计说明书外文摘要

Title  Design and Implementation of Bipolar Excitation Control 

         Strategy for Switched Reluctance Motor Drives System   

Abstract

The Switched Reluctance Motor (SRM) drive uses unipolar excitation strategy。 The facts that the converter is not standard and high levels of torque ripple hinder its large-scale production and application。 This dissertation presents a new bipolar excitation strategy with which standard three-phase full bridge converter can be directly applied into SRD。 

Firstly, development and reseach direction of SRM at home and abroad were introduced。 This dissertation described stuctures and the driving principle of  SRM and introduced the proposed bipolar excitation strategy。

Afterwards, a nonlinear SRM drive controlled by bipolar excitation strategy was modeled by MATLAB/Simulink。 How SRM characteristics impacted by turn-on and turn-off angle and PI parameters by using bipolar excitation stategy was analyzed。The model was then verified by dSPACE sorfware and hardware platform。 

Finally, the DSP program was coded。 The proposed scheme was analyzed and the experimental was investigated on a 4kW, three-phase 12/8 poles SRM。 The experimental results had confirmed a valid reduction of torque ripple by using this proposed technique。

Keywords  Switched Reluctance Motor  three-phase full bridge converters  bipolar excitation

目   录

1 引言 1

1。1 SRM发展现状 1

1。2 SRM的调速系统概述 1

1。3 SRM的特点及研究方向 2

1。4 论文选题意义及内容安排 2

2 SRM控制原理 4

2。1 SRM结构原理 4

2。2 SRM基本方程 5

2。3 SRM驱动原理 7

2。4 开关控制策略 7

2。5 本章小结 13

3 双极性控制SRM调速系统仿真