欢迎来到天天文库
浏览记录
ID:41051061
大小:2.99 MB
页数:274页
时间:2019-08-15
《台达_培训Principles of Converter Control》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、PRINCIPLESOFCONVERTERCONTROLPresentedbyMilanM.JovanovićJune2003PRINCIPLESOFCONVERTERCONTROL•ThistrainingmaterialwaspreparedbyDPELStaffanditisconsideredproprietary•DistributionofthismaterialoritspartsisnotpermittedwithoutwrittenconsentofDPELOUTLINEI.VoltageModeControl•ContinuousConductionMode•Dis
2、continuousConductionMode•StabilityIssuesinDCM/CCMII.VoltageModeControl•DesignExamplesIII.CurrentModeControl•Principles•Multiple-OutputConverters•DesignExampleIV.MagampControl•Principles•DesignExampleV.Single-PhasePFCControl•Principles•DesignExampleVI.AppendicesPRINCIPLESOFCONVERTERCONTROLVOLTAGE
3、MODECONTROLPRINCIPLESOFCONVERTERCONTROLVOLTAGEMODECONTROLINCONTINUOUSCONDUCTIONMODE1VOLTAGE-MODECONTROL•Constant-frequencyPWMcontrolvRAMPvvEA2>EA1divEA1VRAMPLVinVoCLKdvEAEAD1TsPWMVREFD2TsvRAMPTVO=D⋅Vins•Voltageregulationisachievedbyduty-cyclevariation,i.e.,byPulse-Width-Modulation(PWM)control∆d1
4、•PWMcomparator(modulator)gainisFm==∆vEAVRAMPPWMCONTROLOBJECTIVESPOWERSTAGE•Control-loopstabilityVof(d)=VinVinVo•RegulationaccuracyGPS(s)•TransientresponsespeeddRZFD1•Desiredregulationaccuracy,speed,andZIstabilitycanbeachievedbytailoringEAloopgainPWMVREFRD2T(s)=GPS(s)KDGEA(s)FmFmGEA(s)KDModulator
5、VErrorAmplifierwitherror-amplifiercompensationRAMPVoltageDivider®DCloopgaindeterminesregulationaccuracy®Loopcrossoverfrequencydeterminesresponsespeed•Controldesignrequiresknowledgeofpowerstagedynamics,i.e.,power-stagesmall-signalmodel•Switch-modeconvertersarenonlinear,time-invariantsystems2CONCE
6、PTOFPWMSWITCHINCONTINUOUSCONDUCTIONMODEac~~aia(t)ic(t)cVinVodd'=1-d~~pvap(t)vcp(t)cppVinVoCommon-passiveconfigurationaa-activeacpp-passivec-commonVinVo~i(t),v~(t)−instantaneouscurrent,voltageINVARIANTPROPERTIESOFPWMSWITCHINCCM•RelationshipbetweenterminalcurrentsandvoltagesofPWMswitchareindepende
7、ntofconvertertopologyiicciadTsdTs~~ia(t)ic(t)adcd'=1-d~~vap(t)vcp(t)p~~i(t)=ic(t)0
此文档下载收益归作者所有