本科毕业论文-—感应加热逆变电源设计.doc

河南科技大学毕业设计论文

感应加热逆变电源设计

摘要
感应加热可用于金属熔炼、透热、热处理和焊接等过程，已成为冶金、国防、机械加工等部门及船舶、飞机、汽车等制造业不可缺少的技术。此外感应加热正不断的进入人们的家庭生活中，例如电磁炉等都是依靠感应加热原理工作的。感应加热电源的发展趋势是高频化、大容量化、智能化和绿色化。目前的高频感应加热电源频率在几百千赫左右技术比较成熟。
本文以串联半桥感应加热电源为研究对象，首先在介绍感应加热的原理基础上，阐述了感应加热电源的特点、国内外发展状况及应其发展趋势。其次介绍了串联全桥逆变电路与串联半桥逆变电路的优缺点,半桥串联谐振逆变器具有结构简单，控制容易，有良好的经济效益等特点，故此，分析了串联半桥逆变桥的工作原理。再次，在设计了一个串联半桥逆变电路的基础上，对各个器件的具体电路参数进行计算，并合理选择元器件。最后，在一台半桥串联谐振电源上，通过改变整流滤波后的电压，测试了桥臂电压波形，并对波形进行简要分析，得出感应加热电源应尽量避免空载等实验结论。

关键词：感应加热；串联谐振；半桥串联谐振逆变器；IGBT；
ADesignOfInductionHeatingPowerInverter
Abstract
Inductionheatingcanbeusedformetalsmelting,diathermy,heatreatmentandweldingprocess,themanufacturingsectorhasbecomeanindispensabletechnologyinmetallurgy,defense,machiningandotherdepartmentsandships,airplanes,carsandsoon.Besidesinductionheatingisconstantlyenteringpeople'sfamilylife,suchasinductioncooker,etc.arerelyingontheprincipleofinductionheatingwork.Inductionheatingpowersupplyisthedevelopmenttrendofhigh-frequency,high-capacity,intelligentandgreen.Thecurrenthigh-frequencyinductionheatingpowerofaboutafewhundredkilohertzfrequencytechnologyisrelativelymature.
Inthispaper,theserieshalf-bridgeinductionheatingpowersupplyforthestudy,firstprinciplesonthebasisofintroductionofinductionheating,inductionheatingpowersupplyelaboratedcharacteristics,domesticdevelopmentandshoulditsdevelopmenttrend.Secondly,itintroducestheadvantagesanddisadvantagesoffull-bridgeinvertercircuitinserieswithaseriesofhalf-bridgeinvertercircuit,half-bridgeresonantinverterserieshasasimplestructure,easytocontrol,goodeconomicreturns,etc.Therefore,theinverseanalysisofthehalf-bridgeseriesvariableworkingprincipleofthebridge.Again,onthebasisofaseriesofhalf-bridgeinvertercircuitdesignedonthespecificcircuitparameterswerecalculatedforeachdevice,andareasonablechoiceofcomponents.Finally,inahalf-bridgeseriesresonantpowersupplyvoltagebychangingtherectifierfilteraftertestingthelegvoltagewaveform,andthewaveformisabriefanalysis,theinductionheatingpowershouldavoidno-loadandotherexperimentalresults.
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