單元串聯(lián)式多重電壓型高壓變頻在同步機調(diào)速上的研究與應用.pdf

1、武漢科技大學碩士學位論文單元串聯(lián)式多重電壓型高壓變頻在同步機調(diào)速上的研究與應用姓名：李超鋒申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：劉惠康20110520第1I頁武漢科技大學碩士學位論文AbstractSincethebirthofACmotor，thereismorethanacentI】rvThehi曲voltagehighpowerfrequencyconversiontechnologywasthedifficulty

2、andpeoplepayattentiononit11leOfinventionoftheGTOhasprovidedameanofthethyristorspeedcontroltechnologyinlate50s20thcenturyACACconverterhasalotofadvantages，suchassimplestructure，onlyoncechangeeasytointegrateButatthesametime

3、，thissystemrequiresalotofpowerelectronicdevices，theoutputfrequencyislowAlthoughthethree—levelhasaddedtheZerOlevelbychangingthecircuittopologyitreducestheinputharmonicsandthedu／dt，butitcannotfundamentallysolvetheproblemMu

4、lti—voltagehighpressureunitinseriesinvertersystemhasabsoluteadvantagesinthehighfrequencythisfrequencyinvertersystemisbasedonbasicmodulesunitThisinvertersystemhasusedmultipleoftherectifierandthePWMcontroltechnique，therefo

5、re，itgreatlyreducestheinputharmoniccurrent，theharmonicdistortionofthe，面danddu／dtisverysmalletcTlliSinvertersystemissuitableforhighfrequencysystemACdrivesystemisdividedintosynchronousandasynchronousmotordriveThesynchronou

6、smotorhassuchadvantagesashighpowerfactor，smallcapacityhi班efficiencymotorandmomentofinertiaetccomparetoasynchronousmotorspeedcontrolsystemInthispaperthesynchronousmotorhasdifficultyinstartingandofovercurrentprobleminstart

7、theprocessThefrequencyconverterisabletowithstandtheStartofovercurrentbyusingdigitalexcitationsystemofsynchronousmotorstartstochangeinadifferentwaytoadjusttheexcitationcurrentandusingofIGBToverloadcapacitySOsynchronousmot

8、orcanstartsmoothlySynchronousmotorspeedcontrolsysternhasstepproneproblemwhenoverloadItusesselfcontrolledinvertersystemtoreducethestepshockThisarticledescribesthesynchronousmotorvectorcontrol，synchronousmotorCanachievethe

9、exactsoundinthenantimecontr01TmSpaperdescribesthemultiplevoltagehi曲一voltageinvertersystem，thesystemcallreduceinputharmoniccurrentandtheharmonicdistortionofthe研d；du／dtisverysrnallItissuitableforhighvoltageinvertersystemTh

10、esynchronousmotorhasadvantagessuchashighpowerfactorsmallcapacityhighefficiencycomparetoasynchronousmotorSocombinethetwo，witllmultiplevoltagepowersupplyhighvoltageinverterforsynchronousmotors，theprojectcanachievegoodresul

11、tsifwecombinethesynchronousmotorandmulti—voltagehighpressureunitinseriesinvertersystembyusingmultivoltagehighpressureunitinseriesinvertersystemsupplyhighvoltageinverterforsynchronousmotorKeyWords：highvoltagefrequencyconv