基于PS-PWM控制策略的三電平感應加熱電源研究.pdf

1、江南大學碩士學位論文基于PSPWM控制策略的三電平感應加熱電源研究姓名：周小榮申請學位級別：碩士專業(yè)：檢測與自動化裝置指導教師：惠晶20070601AbstractAbstractTheinductionheatingpowerisstudiedanddiscussedinthepaperTheprincipleandthedevelopmenttrendofinductionheatingtechnologyareintroduced

2、inbrie￡Itintroducedtheconventionaltopologythatisusedininductionheatingpowersupply，andcomparativeanalysewasmadebetweenthepowerregulatingmethodsofinductionheatingpowersupplyRecentlymultilevelconvertershavebeenoneofresearch

3、hotpointsinhi曲一voltageandhighpowerapplicationfieldsTheresearchstatusabouttopologies，PWMcontrolmethodsandsoft—switchingtechnologiesofmultilevelconvertersaresummarizedInordertoovercomctheshortcomingsoftheratedvoltageor／and

4、currentbeinglimitedinsinglepowerelectroniccomponentSOthatitscapacityislimitedandtheoutputpowerCannotmeettheneedsoflargeandmedium—sizedworkpiecestreatmentAnovelthree—levelinverterwithserialresonantloadusedinaninductionhea

5、tingpowerisintroducedinthispaper，thecontrolstrategybasedonPS—PWM(Phase—ShiftedPWM)andthecontrolmethodoftheproposedthree—levelinverterarealsoappliedForenhancingtheoutputpowerandimprovingoutputwaveformqualitiesofvoltageand

6、currentsimultaneityThedynamicmodelofthreelevelinductionheatingpowercontrolledbyPSPWMisestablishedandanalyzedBasedontheanalysisresultsinordertoveilfythevalidityandfeasibilityofthePS—PWMcontrolstrategy，usingPspicetosimulat

7、ethepracticaloperationofinduction—heatingpowerinverter(25kHz，540Vdc)AninductionheatingpowercontrolledbyPS—PWMisdesigned，thepowerandfrequencyofwhichare10kwand5kHzseparatelyThespecialDSPchipofTMS320LF2407AthatproducedbyTIC

8、ompanyisusedasmaincontrollerofthepowerThehardwaremadsoftwareofthepoweraredesignedTheexperimentalresultsshowthatthisPS—PWMcontrolledinductionheatingsupplyreachedtheinverterworkinginsoft—switchingstatesandtheoutputpowerise

9、nhancedItcanenhancetheoutputpowerandimproveoutputwaveformqualitiesofvoltageandcurrentsimultaneityThenthewholeblueprintofthesystem，theinvertercontrolblock，drivefingcircuitandprotectivecircuit，andthesimulationmadexperiment