完整版毕业设计.doc

基于软件开关模式的SVPWM技术 摘 要 电压空间矢量脉宽调制(SVPWM)调速方式因具有比其他脉宽调制调速方式更优异的性能而得到了广泛应用。本文首先对脉宽调制技术进行了概述，结果得出在众多的脉宽调制技术中,SVPWM是一种优化的PWM技术。本文对SVPWM技术进行了深入的研究。首先重点分析了SVPWM控制技术的基本工作原理和SVPWM技术的实现步骤。为了减小开关损耗,提高控制器的效率,通过适当选择零矢量使用方式,使得在一个采样周期内的开关动作减少为6次,从而在同样的载波频率下,将开关频率减小了25%,开关损耗大大降低。其次引入了数字信号处理器，重点介绍了TMS320F2407A芯片，提出了基于TMS320F2407A（DSP）软件决定切换模式的SVPWM控制方法,并进行了软件设计。最后通过实验以证明这种方法的有效性，实验结果表明软件决定开关模式在感应电动机控制中可以减少谐波、降低损耗、降低电流波形畸变。 关键词：，软件开关模式，DSP，交流感应电机 SVPWM of software determined Switching Pattern based on DSP ABSTRACT Voltage space vector PWMcontrol mode is better than for other PWM control mode is more superior performance and widely used. This text firstly summarizes the pulse width modulation technique. The result shows that Voltage space vector PWM technology is a kind of optimization technology of PWM. This text studies the voltage space vector PWM technology. Firstly the text analyses SVPWM control technology of basic working principle and realization of SVPWM steps. In order to reduce the loss of the controller, improving switch efficiency, this paper chooses the proper way by using zero vectors in a sampling period for the switching. Therefore it reduces 6 times in the same carrier frequency and decreases the switching frequency to 25%.So the switch loss is reduced greatly. Secondly the text introduces the digital signal processor. This paper pays more attention to the TMS320F2407A chip. This paper proposes a TMS320F2407A (DSP) software decided to switch mode of SVPWM control method and the software design. The experimental results show that the effectiveness of this method is proved. The switch mode which is decided by Software in the induction motor control can reduce the harmonic, loss and the lower harmonic current waveform distortion. KEY WORDS: SVPWM，Software Determined Switching Pattern，DSP，Introduction AC 目　录 前　言 1 第1章 脉宽调制技术 2 1.1 脉宽调制技术基本原理 2 1.2 脉宽调制技术分类 2 1.2.1 正弦波脉宽调制技术 2 1.2.2 消除指定次数谐波的脉宽调制技术 3 1.2.3 电流滞环跟踪的脉宽控制技术 3 1.2.4 电压空间矢量脉宽调制技术 4 第2章 SVPWM控制技