漳州师范学院毕业论文（设计）基于PIC单片机单相SPWM逆变电源的设计TheDesignofInverterBasingonPICMicrocontrollerSingle-phaseSPWM姓名：林小章学号：080502230系别：物理与电子信息工程系专业：电子信息科学与技术年级：2008级指导教师：黄成老师2011年12月31日摘要本系统以单片机PIC16F877A为控制核心的单相全桥式电压型SPWM逆变电源。系统主要由交流220V变压隔离成可调交流电，再整流变换成直流电，SPWM信号通过光耦隔离器控制由开关管MOEFET组成的逆变器件的工作状态，实现对输出的控制，即AC-DC-AC变换。从而得到频率和幅度都可调的正弦交流电，后端再对电压、电流以及频率的采样，从而实现闭环的控制。该逆变电源输出的正弦交流电精度高，性能稳定，实用价值高，在电力电子技术中应用广泛。关键词：SPWM；逆变器；驱动电路；场效应管IRF840AbstractThissystemisasingle-phasefull-bridgevoltage-typeinverterwhichisbasedonPIC16F877Amicrocontroller.Itismainlytransformedfrom220VACtoadjustableAC,thenrectifiestoDC.SignalSPWMcontrolstheworkingstatusoftheinverterdevicewhichconsistsofswitchMOEFETthroughthephotoncoupledisolator.Andthisprocedureachievesthecontroloftheoutput.ThatistheAC-DC-ACconversion.Consequently,thesinusoidalalternatingcurrentwhosefrequencyandamplitudearebothadjustablecomesintobeing.Later,thesamplesofvoltage,current,andfrequencyaretakeninordertocontroltheclosed-loop.Thesinusoidalalternatingcurrentfromthisinverterisinpossessionofhighaccuracy,stableperformance,andhighpracticalutility.Thus,itiswidelyappliedtopowerelectronictechnology.Keywords:SPWM;inverterDriving;circuit；thefieldeffectmanageIRF840目录TOC\o"1-2"\h\z\uHYPERLINK\l"_Toc313633399"摘要PAGEREF_Toc313633399\hIHYPERLINK\l"_Toc313633400"AbstractPAGEREF_Toc313633400\hIHYPERLINK\l"_Toc313633401"1.引言PAGEREF_Toc313633401\h1HYPERLINK\l"_Toc313633402"2.系统设计PAGEREF_Toc313633402\h1HYPERLINK\l"_Toc313633403"2.1设计要求及思路PAGEREF_Toc313633403\h1HYPERLINK\l"_Toc313633404"2.2PWM技术基础PAGEREF_Toc313633404\h3HYPERLINK\l"_Toc313633405"2.3逆变电路的基本工作原理PAGEREF_Toc313633405\h6HYPERLINK\l"_Toc313633406"3.硬件设计PAGEREF_Toc313633406\h7HYPERLINK\l"_Toc313633407"3.1单片机电路设计PAGEREF_Toc313633407\h7HYPERLINK\l"_Toc313633408"3.2主电路设计PAGEREF_Toc313633408\h8HYPERLINK\l"_Toc313633409"3.3驱动电路设计PAGEREF_Toc313633409\h9HYPERLINK\l"_Toc313633410"3.4自举电路设计