【2017年整理】开关磁阻电机控制系统.马宏志.doc

开关磁阻电机控制系统设计 马宏志 摘 要 开关磁阻电机调速系统是一种新型电机调速系统，结构简单，成本低，调速性能优异，是传统交、直流电机调速系统的强有力竞争者，具有强大的市场潜力。 本文以DSP为控制核心，研究并设计了15kW三相12/8极SRM的调速实验系统，用于SRM控制技术的研究。 本文概述了开关磁阻电机调速系统(Switched Reluctance Drive，简称SRD)及其发展和研究现状，论述了其主要研究方向，阐述和分析了开关磁阻电机的结构、运行原理以及系统控制。并且对SRD系统总体硬件结构进行了设计。采用不对称半桥型结构，在进行了相关功率器件选型计算的基础上设计了该SRD调速实验系统的功率变换器。然后，以TMS320LF2407为核心设计了开关磁阻电机控制系统的硬件电路，给出了包括电流检测、位置检测、故障保护等部分电路的详细设计，充分利用了DSP的丰富外设资源，达到了简化电路结构、提高运行可靠性的目的。另外本文讨论了开关磁阻电机控制软件的设计，采用模块化编程方法，采用基于多中断的控制程序，提高了控制软件的效率。最后，利用MATLAB/SIMULINK对上述12/8极开关磁阻电机调速系统建立了非线性仿真模型，并对该系统进行了仿真实验，实现了调速，并达到了开关磁阻电机调速系统研究和设计的预期目标，验证和深化了前文所取得一些理论成果，同时也为更近一步研究打下了基础。 关键词：开关磁阻电机； 调速系统； DSP；MATLAB/SIMULINK；仿真 ABSTRACT Switched Reluctance Drive system is a new motor drive system. It has many good features for example simple structure, low cost and excellent driving performance. Its the strongest competitor to traditional AC and DC drive system, so it has powerful future. This paper developed a speed experimental system for a 3-phase 12/8-pole SRM of 15 kW based on TMS320LF2407 DSP, which can be used for the technical research on SRM control. The thesis summarizes the development and research of switched reluctance drive (SRD), discusses the main research direction. The structure of SRM, operation principle, and the control scheme of the SRD are elaborated and analyzed. And the whole structure of hardware is schemed out for the SRD speed experimental system. Adopting the dissymmetry half-bridge structure, a power converter is designed for the system after selection calculation of the corresponding devices. Then, TMS320LF2407 DSP is used to design the hardware circuits of SRM control system, and design details including the current detection, position sensing, fault protection and PWM output etc. are provided. Because of the full use of the abundant peripheral resources of DSP, it comes to the aim simplifying the circuit structure and heightening the reliability. Also, the thesis discusses the routine designing issue. Because th