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1、摘要摘要本设计是汽车板簧加热用中频电源的设计，中频电源的加热采用的是涡流的加热原理，靠感应线圈把电能传递给要加热的金属，然后在金属内部转化为热能。晶闸管中频电源采用三相桥式全控整流电路将交流电整流为直流电，经电抗器平波后，成为一个恒定的直流电流源，再经单相逆变桥，把直流电流逆变成一定频率（一般为1000至8000Hz）的单相中频电流。负载由感应线圈和补偿电容器组成，连接成并联谐振电路。中频电源采用单片机控制。中频电源具有可靠性高，结构简单，使用方便等优点，因俄日在工业生产中得到了广泛的应用。目前生产中所使用的晶闸管中频感应电源大多采用晶闸管全控桥调节频率、负载为并联谐振型逆变电路的结
2、构，存在着功率因数低、启动装置繁琐、功率调节有限、控制系统复杂等缺点。因而中频电源在器件选择和控制中还需要改善。本设计主要是完成中频电源设计为目的。包括主电路的设计和控制电路的设计。本文的主要内容分为四章，分别阐述了课题的研究背景及意义、晶闸管感应中频电源的工作原理、主电路的设计、控制电路的设计。关键词：晶闸管；整流；平波；逆变；单片机-33-AbstractAbstractThisdesignisheatingvehiclesleafspringIwithm-frequencypowerdesign,Frequencypowersupply,heatingistheeddycurr
3、entheatingprinciple,relyoninductioncoilenergytoheatthemetal,andthenthemetal,intoheat.MediumFrequencyPowerSupplywithfully-controlledthree-phasebridgerectifiercircuitACrectifiedtodirectcurrentbythesmoothingofthereactor,aconstantDCcurrentsource,andthensingle-phaseinverterbridge,theinverseoftheDCcu
4、rrentintocertainfrequency(typicallybetween1000and8000Hz)single-phasemediumfrequencycurrent.Loadbytheinductioncoilandthecompensationcapacitor,connectedtoaparallelresonantcircuit.IFpowermicrocontroller.Frequencypowersupplywithhighreliability,simplestructure,easeofusehasbeenwidelyusedinindustrialp
5、roductionduetoRussiaandJapan.MediumFrequencyinductionpowersupplyusedintheproductionmostofthethyristorcontrolledbridgetoadjustthefrequency,loadparallelresonantinvertercircuitstructure,thereisthepowerfactorislow,thebootdeviceiscumbersome,andlimitedpowerconditioning,controlsystemscomplexandothersh
6、ortcomings.Thusthefrequencypowersupplydeviceselectionandcontrolneedstobeimproved.Thisdesignisthecompletionoftheintermediatefrequencypowersupplyisdesignedforthepurpose.Includingthedesignofthemaincircuitandcontrolcircuitdesign.Themaincontentofthispaperisdividedintofourchapters,respectively,descri
7、bedtheresearchbackgroundandsignificance,thethyristorinductionfrequencypowersupplyworks,maincircuitandcontrolcircuitdesign.Keywords:Thethyristor;Rectification;Flatwave.Inverter;Singlechipmicrocomputer-33-目录目录摘要………………………………………………………
