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ID:48083251
大小:1.01 MB
页数:32页
时间:2019-11-23
《Saber仿真开关电源设计.pdf》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、®PowerConverterDesignUsingtheSaberSimulatorAStep-By-StepGuidetotheDesignofaTwo-Switch,Voltage-Mode,ForwardConverterUsingtheSaberSimulatorBySteveChwirkaAnalogy,Inc.Beaverton,Oregon(503)626-9700Page1of32®TableofContent1.0ScopeofDocument32.0Specifications32.1InputSpecifications32.2
2、OutputSpecifications32.3OtherSpecifications33.0Step-By-StepDesignProcess43.1OpenLoopDesign43.1.1DefinetheDutyCycleandTurnsRatiooftheTransformer43.1.2DesigntheRectifierandFilterCapacitor(OptionalSection)5ValidatetheRectifierandFilterCapacitorusingSaber93.1.3OutputFilterDesign10In
3、ductorDesign10CapacitorDesign113.1.4ValidatetheOpenLoopDesignusingSaber113.2CompensatorDesignusinganAveragedModel153.2.1ValidatetheAveragedModelusingSaber163.2.2Open-LoopACAnalysis183.2.3DesigningtheCompensationCircuit183.2.4ValidatetheCompensatorDesignusingSaber213.2.5Validatet
4、heClosedLoopParametersusingSaber213.3ModulatorDesignandFinalClosedLoopSimulation233.3.1ValidatetheModulatorDesignusingSaber253.3.2ValidatetheClosedLoopDesignusingSaber273.4FinalComponentLevelDesign29Page2of32®1.0ScopeofDocumentThisengineeringdocumentwillguidethereaderthroughthes
5、tep-by-stepdesignofatwoswitch,voltagemode,forwardpowerconverterusingtheSaberSimulator.Intheprocess,wewilldescribetypicaldesignconsiderationsandproblemsandhowtoovercomethem.ValidationofeachstepinthedesignprocesswillbeperformedusingSaber.2.0SpecificationsThefollowingspecifications
6、willbeusedtodesignthepowerconverter.2.1InputSpecificationsLineInput150Vdc,±6VPin(max)=Pout(max)=30/.8535WattsEff2.2OutputSpecificationsVout15VdcVout(ripple)£25mVp-pIout50mAto2AIout(ripple)£100mAp-pPout(max)=(15V)(2A)30Watts2.3OtherSpecificationsEfficiency³85%SwitchingFrequency20
7、0KHz(derived)Page3of32®3.0Step-By-StepDesignProcessThissectiondetailsthestepsnecessarytodesignthepowerconverter.3.1OpenLoopDesign3.1.1DefinetheDutyCycleandTurnsRatiooftheTransformerThebasicrelationshipinaforwardconverterisVout@(Vin)(1/n)(D)whereVout=dcoutputvoltagen=turnsratio=n
8、p/nsD=dutycycleGiventhatVout=15VDCandVin=150VDC
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