本科生毕业设计(论文)摘要本文设计的PWM交流变频调速系统采用GTO作为主功率器件,以16位单片机8098为控制核心,辅以正弦脉宽调制专用芯片HEF4752V配合而完成三相异步电动机的PWM交流变频调速系统。本调速系统充分利用了三相PWM集成芯片HEF4752V的低功耗、可编程、输出开关频率高等优点,与高能的16位单片机8098构成调速系统的微机控制部分。同时采用HEF4752V产生的GTO驱动电路,HEF4752V的使用不仅使得系统的硬件设计得到简化,而且还有助于提高系统运行的可靠性。该调速系统由8279构成键盘显示部分,键盘部分通过16键键盘输入命令,0~9为数字键、A~F为功能键实现相应的功能;显示部分采用8位8段共阴极LED进行显示。HEF4752V用于产生PWM信号,它能方便组成各种PWM逆变器-交流电机变频调速系统、不断电电源等。本调速系统软件部分进行了系统主程序、键盘扫描程序、显示程序以及升降频的控制程序等的设计,还对PID算法进行介绍,并用其进行计算分析对本系统加以控制,为保证系统工作的可靠性,设计了多种保护电路和抗干扰措施。该变频系统的研究开发将有利于风机、泵类等传统传动机构的技术改造,为变频器的开发和研究打下基础。系统的实时控制性好,电路简单可靠,特别适用于中小功率的交流异步电动机的变频调速系统。关键词:单片机;变频调速;HEF4752V;GTOI本科生毕业设计(论文)AbstractInthispaper,AdigitalcontrolofACvariablefrequencydrivesystembasedonhighcarrierfrequencyPWMconverterisdeveloped.ItusesthepowerGTOasmainswitch,the16bitsinglechipmicrocomputer8098asthecontrolunit,thelarge-scaleintegrationHEF4752VasPWMwaveformgenerator.TheadvantagesofHEF4752Varefullyutilized.Theyarelowconsuming,programmableandhighswitchingfrequency.Itformsthecomputercontrolcomponentofthedrivesystemwithsinglechipmicrocomputer8098.TheGTOdrivecircuitusesHEF4752Vdriver.Thehardwareissimplified,andsystemreliabilityisimproved.Thesystembasedonkeyboardcontrol.Itskeyboardconstituteswith8279.Thereare16keysinkeyboardpart.Keys0~9aredata-keys,A~Farefunctionalkeys,adopt8bit8totalcathodeLEDdisplays.HEF4752VisdesignedspeciallyforgeneratingPWMsignals,ItisconvenienttogetvariousvariablefrequencyvariablespeedPWMinverter-ACmotordriversystem,interrupttablepowersourcesetc.Thesoftwareisinstitutewithmainprocess,keyboardscanprocess,displayprocessandhigh-downfrequencycontrolprocess.ThePIDcontrolisusingequivalentareaprinciple.Itishighaccuracyandeasytocalculate.Itdesignsprotectsystemtomakethesystemworkwell.Thehardware,thecontrolalgorithmandthesoftwareofthecontrolsystemarediscussed,showsthatthesystemworkswell.Thereal-timecontrolperformanceofthissystemisgoodandelectricalcircuitissimpleandreliable.ItispreferableinthesmallandmiddleACasynchronousmotorfrequencychange-timingsystem.KeyWords:Singlechipmicrocomputer;Frequencychange-timing;HEF4752V;GTOII本科生毕业设计(论文)目录第1章绪论................................................................................................11.1交流调速技术的发展概述................................................................11.1.1发展过程................................................................................11.1.2交流调速系统分类................................................................21.1.3交流调速系统的主要应用领域............................................31.2器件技术与交流调速系统................................................................41.2.1电力电子器件........................................................................41.2.2发展前景................................................................................71.3论文的总体设计内容..............