Comparisons of PWM and one-cycle control for digital power amplifiers

《Comparisons of PWM and one-cycle control for digital power amplifiers 》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、ComparisonsofPWMandOne-CycleControlforDigitalPowerAmplifiersChangQian,ZhengmingZhao,YunfengLiu,XigenZhouDepartmentofElectricalEngineeringTsinghuaUniversity,Beijing,100084ChinaEmail:qianchanrrci3263.netAbstract-Anewparadigmexistingforinvertercontroldistortionisgreatlyabated,Astothedyna

2、micresponse,isone-cyclemethodwhichcaneflectivehreducetheone-cyclecontrolhasfasterresponsetofollowarbitraryharmoniccomponentsfiominverters.Basedonthereferencesignalswithinminimaldelay[2].Thecentricconceptsofcascadedmultilevelconvertersandone-ideaofone-cyclecontrolisforcingtheswitchedva

3、riablecycletechnique,acomparisonwasconductedtotoexactlyequalthereferencesignalineverycyclewhilecharacterizethedistortionofPWMandone-cyclePWMcontrolmakestheswitchedvariableequaltothecontrolmethodsthatwereappliedtoinverters.inputsignalinawholeperiod[I].Additionally,one-Simulationprogram

4、sforthedifferentcontrolschemescyclecontrolcansuppresstheripplecausedbythesmallwereruninPSIMsofbvareinitiallytoseetheefectofchangeofDCvoltagesources[2].UnderPWMcontrol,one-cyclecontroldi8erent@omthatofPWMcontrol.theripplecausedbyDCsourcecannotbeobviatedAflerwards,aDSPcontrolboardhasbee

5、ndesignedandbecauseDCsourcesareconsideredasidealsourcesprogrammedtocontrolaninverterunderdiflerentwhichareabsolutelyconstant.Inordertocomparethecontrolstrategiestocompareone-cyclemethodwithtwocontrolmethodsexperimentally,thecontributionofPWMmethod.Withthecomparisons,theadvantagesapply

6、ingthemtothesamemaincircuitwasconducted.andthedisadvantagesareidentrfiedforeachmethodThispaperinvolvesaDSP-basedcontrolboardandaOne-cycleschemeisbetterthanPWMcontrolinnine-levelcascadedinverter[8]asapowercircuitwhichreducingundesirableharmonicsandtracingdynamicsupportsbothofthecontrol

7、methods.TheloadisawaveformsSimulationandexperimentalresultsarepureresistorof30Ohm.Section2describesoperatingalsoprovidedtoveriJLtheconclusions.principlesofPWMandone-cyclecontrols.Section3Keywords:PWMcontrol,one-cyclecontrol,cascadeddiscussesthesimulationprocedureandexperimentalinverte

8、r,mul