600kwIGBT串联谐振式节能中频电炉主电路的设计

摘要I摘要就目前来说，中频感应加热的加热速度快并且控制起来十分方便，已经在诸多行业中得到了广泛的应用。本文对600kwIGBT串联谐振式节能中频电炉主电路系统进行了设计，主要工作如下：一．高压10kV进线开关柜的设计，高压10kV系统为小电流接地系统，设计过电压和过电流保护，设计电压、电流和电能计量。二．设计整流电路、滤波电路以及逆变电路，说明其原理。三．说明元件工作原理和电路设计原理及依据，说明降低谐波和节能原理。本设计阐述了串联谐振中频感应电炉的主电路整体结构，并且给予了基本电路的理论分析，推导了主电路的计算公式，阐述了经过整流桥和谐振负载改造后优点，完成了逆变电路、整流电路以及电抗器的设计。目前为止，串联谐振中频电炉仍具有大量的使用空间，使得该课题具有其现实意义。关键词：感应加热；串联谐振；晶闸管；逆变；整流AbstractIIAbstractFornow,therateofheatingofthemediumfrequencyinductionheating,fastandcontrolisveryconvenient,hasbeenwidelyusedinmanyindustries.Thisarticle600KwIGBTseriesresonantenergy-savingintermediatefrequencyelectricfurnacemaincircuitsystemdesign,themainworkisasfollows:One.Thedesignofhighvoltage10KVlineswitchgear,highvoltage10KVsystemforsmallcurrentgroundingsystem,thedesignofovervoltageandovercurrentprotection,designvoltage,currentandpowermeasurement.Two.Thedesignphaseintothe10KVsixlinerectifiertransformerwiring,selectionoftheratedvoltageandthevoltagedrop,lowpressureoutletovervoltageandovercurrentprotection,indicatingthatreducingtheharmonicprinciple.Thire.Descriptionofthecomponentsworkingprincipleandcircuitdesignprinciplesandbasisofthelowerharmonicsandenergyconservationprinciple.Thedesigndescribedtheoverallstructureofthemaincircuit,theseriesresonantmediumfrequencyinductionfurnaceandgiveatheoreticalanalysisofthebasiccircuit,themaincircuitisderivedformulaontheadvantagesofthetransformationafterthebridgerectifierandtheresonantloadinvertercircuitiscompleted,designoftherectifiercircuit,reactor,andthelineinductance.Sofar,theseriesresonantintermediatefrequencyelectricfurnacestillhasalotofuseofspace,thesubjecthasitspracticalsignificance.Keywords:inductionheating;seriesresonance;thyristor,inverter;rectifier目录III目录摘要...........................................................................................................................IAbstract........................................................................................................................II目录.........................................................................................................................III第一章概论..........................................................................................................-1-1.1选择课题的背景及意义............................................................................-1-1.2串联谐振中频电炉主电路结构的设计....................................................-2-1.3该课题的研究目标....................................................................................-3-第二章中频电炉的工作原理..............................................................................-4-2.1中频电炉的内部结构................................................................................-4-2.2电磁感应原理............................................................................................-4-2.3感应加热效应............................................................................................-5-2.3.1集肤效应...........................................................................................-6-2.3.2邻近效应...........................................................................................-7-2.3.3端部效应...........................................................................................-8-2.3.4圆环效应...........................................................................................-8-2.4中频电炉负载............................................................................................-9-2.4.1负载磁场...........................................................................................-9-2.4.2负载电阻.........................................................................................-10-2.4.3负载参数.........................................................................................-11-第三章中频电源和小电流接地系统................................................................-13-3.1中频电源系统..........................................................................................-13-3.2小电流接地系统......................................................................................-15-3.2.110kV进线开关柜的选择...............................................................-15-3.2.2电压、电流和电能计量................................................................-17-3.2.310kV线路过电压和过电流保护...................................................-18-第四章整流电路................................................................................................-19-4.1中频电源整流电路的条件......................................................................-19-目录IV4.2整流电路原理分析................................................................................-20-4.3阻感负载时的工作情况..........................................................................-20-4.4十二脉进线消除谐波..............................................................................-22-4.4.1串联谐振主电路............................................................................-22-4.4.2谐波分析........................................................................................-23-4.5滤波电路原理分析..................................................................................-23-第五章逆变电路...........................