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1、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,
2、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;25ADesignOfInductionHeatingPowerInverterAbstractInductionheatingcanbeusedformetalsmelting,diathermy,heatreatmentandweldingprocess,the
3、manufacturingsectorhasbecomeanindispensabletechnologyinmetallurgy,defense,machiningandotherdepartmentsandships,airplanes,carsandsoon.Besidesinductionheatingisconstantlyenteringpeople'sfamilylife,suchasinductioncooker,etc.arerelyingontheprincipleofinductionheatingwork.Inductionheatingpowersupplyis
4、thedevelopmenttrendofhigh-frequency,high-capacity,intelligentandgreen.Thecurrenthigh-frequencyinductionheatingpowerofaboutafewhundredkilohertzfrequencytechnologyisrelativelymature.Inthispaper,theserieshalf-bridgeinductionheatingpowersupplyforthestudy,firstprinciplesonthebasisofintroductionofinduc
5、tionheating,inductionheatingpowersupplyelaboratedcharacteristics,domesticdevelopmentandshoulditsdevelopmenttrend.Secondly,itintroducestheadvantagesanddisadvantagesoffull-bridgeinvertercircuitinserieswithaseriesofhalf-bridgeinvertercircuit,half-bridgeresonantinverterserieshasasimplestructure,easyt
6、ocontrol,goodeconomicreturns,etc.Therefore,theinverseanalysisofthehalf-bridgeseriesvariableworkingprincipleofthebridge.Again,onthebasisofaseriesofhalf-bridgeinvertercircuitdesignedonthespecificcircuitparameterswerecalculatedforeachdevice,andareasonablechoiceofcomponents.Finally,inahalf-bridgeseri
7、esresonantpowersupplyvoltagebychangingtherectifierfilteraftertestingthelegvoltagewaveform,andthewaveformisabriefanalysis,theinductionheatingpowershouldavoidno-loadandotherexperimentalresults.Keywords:inductionheating;s