cpsspwm调制技术研究及其fpga实现学士学位论文.doc

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1、┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊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:1.学习电力电子技术的主要内容。2.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┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊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

2、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SPW

3、M发生器Abstract┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊Afterthoroughlyanalyzingthegenerationprincipleofmulti-levelconverter,theorticalanalysisofmodulatingprincipleandoutputvoltagewaveformofbipolarCPS-SPWMandsinglepoledoublefrequencyCPS-SPWMisdone.Thereareafewmethodsnow,theyhavetheirad

4、vantageanddisadvantage,inordertosolvethedrawback,awholenewmethodtogeneratemultipathSPWMbyFPGAcompletelyisproposed,whichisrealizedinAlteraFPGA.Thisgeneratormayproduce60-waySPWMwaveformandadjusttheamplitudeandthefrequencyoftheSPWMwaveform.Amulti-levelinverterwith3phasecanbemodulated

5、bythesewaveform.Theveryoutputwaveformofthisinverterisa11-levelsinewave.Bymeansoftheoptimumdesign,thechipresourcesissavedandthechipefficiencyisenhanced.Thesimulativeandexperimentalresultsprovedthefeasibilityofthedesign.Keyword:Powerelectronics;Multilevel-converter;Carrierphaseshift

6、edSPWMgenerator┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊目录1绪论·································································11.1逆变技术概述·····················································11.2多电平逆变技术概述···············································21.2.1多电平逆变器的结构···················

7、·························21.2.2多电平逆变器的输出············································21.2.3多电平逆变器的控制············································31.3本课题的意义和任务···············································32CPS-SPWM技术研究··················································42.1CPS-SPWM技术

8、概述·······························