第34卷第8期·1698·2008年8月岛电压技术HighVoltageEnginceringVoI.34No.8Aug.2008数字恒频移相调功串联谐振逆变电源的研制徐应年1,赵阳2,康勇1(1.华中科技大学电气与电子工程学院,武汉430074;2.湖北工业大学电气与电子工程学院,武汉430068)摘要:当两个或多个感应加热线圈距离很近且电源工作频率不同时,就会产生低频噪声。针对这一问题,提出了恒频移相调功方式,在功率调节过程中,超前臂开关管始终工作在零压开通、零压关断状态;滞后臂开关管在移相角小于负载阻抗角时工作在零压开通状态,在移相角大于负载阻抗角时工作在零流关断状态。还详细分析了开关模态,给出了超前臂开关管并联电容的选择原则和相应实验波形。产品长期运行的结果表明,所提出的功率调节方式不仅成功解决了上述低频噪声问题,而且开关损耗小,可靠性高,具有极大的工程应用价值。关键词:低频噪声;恒频移相调功i零压开通;零流关断;串联谐振;逆变电源中图分类号:TM464文献标志码:A文章编号:1003—652012008J08—1698一06DeVeIopmentofDigitalConstantFrequencyShjft—phasePowerRegulationSeriesResonantInverterSourceXUYing—nianl,ZHA0Yan92,KANGYon91(1.CollegeofElectricalandElectronicEngineering,HuazhongUniversityofscienceandRchnology,Wuhan430074,Chjna;2.CollegeofElectricalandElectronicEngineering,HubeiUniVersityof7kchnology,Wuhan430068,China)AbStMct:Whentwoormore讯vertersarenearandtheirsoufceSareoperatingwithdifferentswitchingfrequency-loⅥ卜frequencynoisehappens.Inordertoavoidaudiblenoises-thispaperpresentstheconstantfrequencyshift—phasepowerregulationforse“esresonantinverters.LeadinglegswitchesalwaysworkatZVS.LagginglegswitchesworkatZCSwhenshiftphaseangleisbiggerthanloadimpedanceangleIotherwiselagginglegswitchesworkatZVS.Thispaperanalyzes5witchmodesindetail-andpresentschoicerulesofparallelcapacitanceofIeadingIegswitchesandcorrespondingexperimentwaveforms.Long_termpracticalengineerIngoperationresultsshowthisnewpowermodulationwithenginee“ngapplicationvaluecaneliminateaudiblenoises,decreaseswitchloss-andimprovereIiabmty.Keywords:Io、^卜frequencynoise;constantfrequencyshift—phasepowerregulation;zerovoltageturnon;zerocur—rent...