cpsspwm调制技术研究及其fpga实现大学毕业设计.doc

安徽工业大学 毕业设计(论文)任务书 毕业设计（论文）的主要内容: 学习电力电子技术的主要内容。 研究CPS-SPWM技术的原理。 3.设计一种完全基于FPGA的CPS-SPWM调制波形产生的方案。 4.完成对系统的软硬件测试。 起止时间： 2010 年 3 月 5 日至 2010 年 6 月 1 日共 14 周 指 导 教 师 签 字 系 主 任 签 字 院 长 签 字 摘要 在分析了多电平逆变原理的基础上，分别对双极性CPS-SPWM和单极倍频CPS-SPWM的调制原理和输出波形进行了严密的公式推导和理论分析。在比较了几种CPS-SPWM调制脉冲产生方案后，为了解决一些存在的问题，提出了一种完全由FPGA产生CPS-SPWM调制波的设计方案，并在EP1C6上实现了基于该方案的调制波形发生模块。该模块可产生三相共60路CPS-SPWM调制波形，使用该模块产生的调制波形控制三相五级全桥式逆变器，可产生多达11电平的输出正弦波。设计加入了多样化设计，可通过用户接口进行电平数、调制度、载波比等参数设置。通过优化设计，节省了芯片资源，提高了芯片效率。仿真和实验证明了该设计的可行性。 关键词：电力电子；多电平变换器；载波移相SPWM发生器 Abstract After thoroughly analyzing the generation principle of multi-level converter, theortical analysis of modulating principle and output voltage waveform of bipolar CPS-SPWM and single pole double frequency CPS-SPWM is done. There are a few methods now, they have their advantage and disadvantage, in order to solve the drawback, a whole new method to generate multipath SPWM by FPGA completely is proposed, which is realized in Altera FPGA. This generator may produce 60-way SPWM waveform and adjust the amplitude and the frequency of the SPWM waveform. A multi-level inverter with 3 phase can be modulated by these waveform. The very output waveform of this inverter is a 11-level sine wave. By means of the optimum design, the chip resources is saved and the chip efficiency is enhanced. The simulative and experimental results proved the feasibility of the design. Keyword: Power electronics; Multilevel-converter; Carrier phase shifted SPWM generator 目录 1 绪论·································································1 1.1 逆变技术概述·····················································1 1.2 多电平逆变技术概述···············································2 1.2.1 多电平逆变器的结构············································2 1.2.2 多电平逆变器的输出············································2 1.2.3 多电平逆变器的控制············································3 1.3 本课题的意义和任务······