峰值电流buck变换器非线性现象分析与斜坡补偿控制设计

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1、万方数据AbstractWiththerapiddevelopmentoftheconsumerelectronicsindustryandthegrowingdemandforportableproducts，DC—DCconverterhasbeenwidelyappliedinallkindsofelectronicproducts，meanwhilebringsabroadmarketprospect．Asatypicalstrongnonlineartime-varyingdynamics

2、ystem，DC-DCconverterexistsabundantnonlinearphenomenasuchasbifurcationandchaos．Tbereore，studyingthenonlinearbehaviorandchaoscontroloftheDC．DCconverterisofgreatimportancetooptimizecircuitparametersandbroadenstableoperationrangeofthesystem，Furthermore，stu

3、dyingthesystemdesignandoptimizationoftheDC_DCconverterhasimportantpracticalmeaningsonimprovingsteady-stateandtransientperformanceoftheconverter,reducingvolumeandpowerconsumptionandshorteningR&DcycleTakingpeak-currentcontrolBuckDC-DCconverterastheresear

4、chobject，thispaperstudiesitinthreeaspects：nonlinearphenomena,slopecompensationandsystemdesigan．Firstly,basedonsingle。loopcontrolledpeak—currentBuckconverterinCCMastheresearchobject,thispaperestablishesatwo·dimensionalexactdiscretemappingmodel，andstudie

5、sthenonlineardynamicbehaviorofconverterindetail，especiallytheinfluenceofswitchingfrequencyonconverter,usingmethodssuchasbifurcationdiagram，Poincardsection，time．domainwaveform，phaseportrait，JacobianmatrixandLyapunovexponent．Theresultsshowthattheconverte

6、rhasexperiencedthebifurcationroutesfromperiod—doublingbifurcation，bordercollisionbifurcationtochaoswhenparameterschanging．Then，basedonsingle-loopcontrolledslopecompensationBuckconverterinCCMastheresearchobject，thispaperestablishesatwo—dimensionalexactd

7、iscretemappingmodel，andstudiestheinfluenceofslopecompensationonconveterstabilityusingbifurcationdiagram，time。domainwaveform，phaseportraitandJacobianmatrix，andforecaststhestableparameterdomainforconverter．TheresultsshowthattheslopecompensationCaneffecti

8、velybroadenstableoperationrangeofthesystem．Finally,basedondouble．100pcontrolledpeak-currentBuckconverterinCCMastheresearchobject,thispaperestablishesacompletesmallsignalmodelandaccomplishesthedesignofcurrentloopandvoltagelooprespectivel