基于DSP的异步电机交流调速系统.doc

基于DSP的异步电机交流调速系统设计 摘 要 随着电力电子技术、计算机控制技术的迅速发展，变频调速以其优异的调速性能、高效节能和广泛的应用范围等优点而成为发展趋势,被国内外认为最有发展前途的调速方式。 数字信号处理器(DSP)运行速度快，能够完成复杂的控制算法，适合于建立高性能的调速系统。本课题采用TI的电机专用控制芯片TMS320LF2407DSP，开发出了基于矢量控制的变频调速系统。采用新型的PWM调制方式——空间电压矢量法(SVPWM)，提高了能量的利用效率。 内容主要包括了空间电压矢量SVPWM的基本原理，及DSP实现SVPWM的方法；确定适合本系统要求的控制方案，完成系统的方框图；设计了控制系统的硬件电路，并对其中一些基本单元电路和技术进行分析；设计了控制系统的软件部分，给出了基于TMS320LF2407的EV模块SVPWM波形产生流程。 关键词：变频调速系统；数字控制器；TMS320F240；SVPWM Design of Induction Motors AC Speed Regulation System Based on DSP ABSTRACT With the rapid development of power electronics technology, computer control technology. The variable frequency speed regulation system is generally acknowledged by the home and abroad that it has a great future with excellent speed regulation, high efficiency saving energy, extensive scope of application and other merits. The high-speed digital signal processing (DSP) complete the complicated the algorithm of control, and suit for the velocity modulation system that create the high performance. Using the digital signal processor (DSP) TMS320LF2407 of TI, which is special for motor control, we develop a suit of Variable frequency speed regulation system based on the vector control. The new-style PWM modulation manner—SVPWM is adopted and the utilizing efficiency of the energy is enhanced. This content include Space Vector Pulse Width Modulation (SVPWM) basic rationale, described and the achieving means of the SVPWM; Fit for the requirements of the control system, complete system block diagram; Design of the control system hardware circuit, as well as some of the basic circuit module and technical analysis; Design of the control system software circuit, based on the EV TMS320LF2407 SVPWM waveform generator module processes is presented. Keywords：Variable frequency speed regulation system; Digital Controller; TMS320F240; SVPWM 目 录 摘 要 I ABSTRACT II 插图清单 V 表格清单 VI 引 言 1 第一章 绪 论 2 1.1 课题任务 2 1.2 变频技术与异步电机控制技术 2 1.3 国内外现状对比 2 第二章 异步电机变频调速原理 4 2.1 变频调速基本知识 4 2.2 异步电动机