采煤機(jī)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(xué)校代碼：學(xué)校代碼：UDCUDC：密級：級：碩士學(xué)位論文碩士學(xué)位論文采煤機(jī)變頻調(diào)速系統(tǒng)長輸出電纜的特性研究采煤機(jī)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(dǎo)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(xué)科專業(yè)：學(xué)科專業(yè)：機(jī)械設(shè)計及理

2、論機(jī)械設(shè)計及理論研究方向：研究方向：采煤機(jī)械機(jī)電一體化采煤機(jī)械機(jī)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(xué)研究總院2013年12月煤炭科學(xué)研究總院碩士學(xué)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