采煤機變頻調(diào)速系統(tǒng)長輸出電纜的特性研究.pdf

1、分類號：分類號：學校代碼：學校代碼：UDCUDC：密級：級：碩士學位論文碩士學位論文采煤機變頻調(diào)速系統(tǒng)長輸出電纜的特性研究采煤機變頻調(diào)速系統(tǒng)長輸出電纜的特性研究ResearchontheVariableFrequencySpeedSystemusedinCoalMineMiningMachinerywithLongCable研究生：生：劉聰導師：師：劉振堅劉振堅研究員研究員項止武項止武教授級高工教授級高工學科專業(yè)：學科專業(yè)：機械設(shè)計及理

2、論機械設(shè)計及理論研究方向：研究方向：采煤機械機電一體化采煤機械機電一體化培養(yǎng)單位：培養(yǎng)單位：煤科總院上海分院煤科總院上海分院煤炭科學研究總院2013年12月煤炭科學研究總院碩士學位論文IIABSTRACTWiththeadvancementofhighpowerswitchtechnologyVVVF（VariableVoltageVariableFrequency）alwaysbecomememeimptantinmodernindu

3、stry.Atpresentthetechnologyiswidelyusedinthecoalmineminingmachinery.Sometimesthedistancebetweentheinverterthemotisveryfar，sothesystemalwaysrequireslongcabletocarrytheinvertersoutputtothemotside.Longcablebetweentheinverte

4、rsmotsleadstoovervoltagecommonmodevoltagehighfrequencygreatmanyharmonicetc.Theseadverseeffectsdecreasereliabilityincreasefailuresseriouslyaffectstheuseoffrequencyinverter.ThistopicestablishesthemathematicalmodelofthePWMd

5、rivesystembyusingthetransmissionlinethey.Basedonthismodelthistopicusestransmissiontheytoexplainovervoltageappearinmotterminalwhenmotfedbyinverterthroughlongcable.Thistopicalsostudiestheessenceofcommonmodevoltagegenerated

6、bygeneralPWMinvertercalculatesitsamplitudedeepintoitsacteristic.ToeliminatetheadverseeffectswithinverterthistopicresearchesthedesignproceduresofsecondderRLCinverteroutputterminalfilterparametersthemethodcannotonlyinhibit

7、themotterminalconventionalovervoltagephenomenonatthesametimebutalsohasverysignificantinhibitioneffectfthemotproducingovervoltagephenomenonofsuper2timesamplitudethehighharmonicoscillationthefeasibilitytheeffectivenessarev