PSIM 使用教学(new)

page1PSIM使用教學台灣新竹‧交通大學‧電機與控制工程研究所‧808實驗室電力電子系統晶片、數位電源、DSP控制、馬達與伺服控制:PowerElectronicSystems&ChipsLab.,NCTU,TaiwanLAB808NCTULab808:電力電子系統與晶片實驗室PowerElectronicSystems&Chips,NCTU,TAIWAN台灣新竹•交通大學•電機與控制工程研究所page2Contents1.SetupPSIM6.02.Introductionbasicfunctions3.Example-Buckconverter4.Homeworkpage3PowerElectronicSystems&ChipsLab.,NCTU,Taiwan電力電子系統與晶片設計實驗室PowerElectronicSystems&ChipsLab.交通大學•電機與控制工程研究所1.SetupPSIM6.0page4OpeningThePSIM6.0FileClickingthe.exepage5SetupStepsStep1.Step2.Step3.Warning:Deletingthecurrentname.Step4.page6PowerElectronicSystems&ChipsLab.,NCTU,Taiwan電力電子系統與晶片設計實驗室PowerElectronicSystems&ChipsLab.交通大學•電機與控制工程研究所2.Introductionbasicfunctionspage7OpenANewFileNewworkspacepage8MainWorkingFunctions常用元件Runsimulation觀看波形圖page9SelectingElements所有元件page10PlacingElements1.點選元件後在電路圖中連續點左鍵即可連續放置相同元件，如要取消則按Esc2.在未放下元件前點選滑鼠右鍵則可以將元件旋轉90度page11PlacingElements(Cont.)鏡射、翻轉拉線注意:點各元件左鍵兩下可以修改各元件值，其中Currentflag的值設為1的話，即可在模擬後查看元件通過的電流大小。page12PowerElectronicSystems&ChipsLab.,NCTU,Taiwan電力電子系統與晶片設計實驗室PowerElectronicSystems&ChipsLab.交通大學•電機與控制工程研究所3.Example-BuckConverterpage13BuckconverterovLCDiode+-+-vL-RdVon-offswitchcontrollermosfetpage14量測電壓電流波形voltageandcurrentprobe差動電壓探棒runsimulation或按F8page15waveformspage16waveform(cont.)page17Addscreenaddscreen(增加視窗看波形)page18waveform(cont.)page19Add/deletecurveAdd/deletecurve(可在同一視窗看多個波形)page20waveform(cont.)zoompage21waveform(cont.)page22Measuremeasure顯示measure值視窗page23PowerElectronicSystems&ChipsLab.,NCTU,Taiwan電力電子系統與晶片設計實驗室PowerElectronicSystems&ChipsLab.交通大學•電機與控制工程研究所4.Homeworkpage24HomeworkV1V2±20V3Ω9Ω1Ω20mFVo+-t=01.利用psim模擬電路(1)，並在波形中顯示V1,V2,I1,I2的值，最後與自己計算的結果相比較。±6A20V6Ω10Ω4Ω2ΩI1I2(1)(2)2.開關在t=0之前，已關閉很長一段時間，在t=0時打開，試用psim模擬t0之後的Vo波形，並計算出電容在t=0時的初始值與模擬相比較。page25ViVo--如何在psim模擬左側電路的頻率響應圖?RCR=1kΩC=0.1uF11.011)1.0)(1(111)()(smukssRCsVsViopoleat10krad/s=1.59kHz頻率響應page26頻率響應page27頻率響應flagforpoints=0log10scaleflagforpoints=1linearscalepage28頻率響應page29頻率響應a.設定timestep為掃到最終頻率週期的0.01倍b.Totaltime使得系統進入穩態sek425.181-最高頻率的週期page30bodeplot-3dBpointpage31buckconverter如何去跑duty對Vo的頻率響應?727210240001010011)()(ssLCRCssLCVsdsVdopolesat-2000+4000i-2000-4000i4472rad/s711Hzpage32頻率響應startamplitude為dc值的0.01倍endamplitude增大5倍page33頻率響應b.totaltime0.01秒使系統進入穩態a.設定timestep為掃到最終頻率週期的0.01倍page34bodeplot711Hzdcgain=20log50=34page35台灣新竹‧交通大學‧電機與控制工程研究所‧808實驗室電力電子系統晶片、數位電源、DSP控制、馬達與伺服控制:PowerElectronicSystems&ChipsLab.,NCTU,Taiwan電力電子系統與晶片設計實驗室PowerElectronicSystems&ChipsLab.交通大學•電機與控制工程研究所2.BuildingaSubcircuitpage36Whyweneedtobuildsubcircuit?ControllercircuitPowerStagepage37Step1GeneratingaNewSubcircuitNewSubcircuit對此方塊點左鍵兩下進行內部電路編輯page38Step2Editingthesubcircuit子方塊內部架構編輯視窗將此部份電路丟到子方塊內部page39Step2EditingTheSubcircuit(Cont.)page40Step3EditingPortNamePortPlacepage41Step4ChangingTheSubcircuitSizepage42Step5FinishingTheSubcircuitpage43Step6ChangingTheTextTextColorChangingwordsizepage44page45page46BuckConverterPresentationDigitalDisplayandMediaPowerNCPowerSBULITE-ONTechnologyCorp.MHCHANJune,24th,2007PowerElectronicSystems&ChipsLab.,NCTU,Taiwan電力電子系統與晶片設計實驗室PowerElectronicSystems&ChipsLab.交通大學•電機與控制工程研究所1.BuckConverterPrincipleandDesignpage47Outline1.Principle2.Continuous-ConductionMode(CCM)3.BoundaryMode4.Discontinuous-ConductionMode(DCM)5.Simulationpage48Principle-BasicinvloadRoutv1Stoutvt0inVontofftSToutVThisisabasicDC-DCconverter.Averageoutputvoltage:ddsonTstontonsTsosoDVVTtdtVddtTdttvTV01)(100page49Principle-Buck1.Inductoractingasshortcircuitinsteadystate.2.Capacitorsactasopencircuitinsteadystate.3.Thecurrentflowsoninductoriscontinuous.4.BuckconverterisanDC-DCconverter.Andit’soutputvoltageisalwayssmallerthaninputvoltage.dV-1S1DL-LiLvCRoV-diLow-passfilterBuckconverterbasiccircuitpage50Principle-SwitchfrequencyFromleftpicture,switchhasits’harmonicdistortion.Howcanreducetheinfluenceofoutputvoltageswing?Switchfrequencyismuchlargerthanthecornerfrequency.Eliminatetheharmonicdistortionofswitching.page51CCM-Capacitor’svoltagecontinueWhenswitchison,VLispositiveandequalto(Vd–Vo).Whenswitchisoff,thecapacitor’svoltageismaintainVo.SoVLturnstonegativeandequalto(Vo).tontoffpage52CCM-Inductor’sshortfeature000TstonlTstonlldtvdtvdtvTheinductor’saveragevoltagewillequaltozero.DTtVVtTVtVVsondoonsoonod--)(page53CCM-Inductor’scurrentcontinueThecurrentflowsontheinductorisstillthesamedirectionevenwhentheswitchturnsoff.Theinductorabsorbsenergywhenswitchison.Andreleasingpowerwhenswitchturnsoff.page54CCM-CalculatethepeakinductorcurrentLVdtdidtdiLVLLLLILpeakTheslopeformulaofinductorcurrentisshownbelow:Thepeakvalueoftheinductorcurrentis:odsLLLLpeakVVLDTIIII-221page55BoundaryModesodLOBLBDTLVVIII-2121Whenouraverageoutputcurrentreduces,iL,minmaybetouchthebottomofzerocurrent.WecanselecttonortofftocalculatetheILBandIOB.Weusetontocalculatebelow:oLIIpage56BoundaryMode-ThemaxvalueDDLVTIdsLB-125.00212-DDLVTdDdIdsLBWeknow:It’safunctionofdutycycleIfwewanttofindits’maximumvalue.Wecanderivate