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1、本科生毕业设计（论文）专业外文翻译原文：FrequencyVariationSpeedControl译文：变频技术指导教师：职称：讲师学生姓名：学号：1002120340专业：电气工程及其自动化院（系）：机电工程学院2014年3月20日FrequencyVariationSpeedControlThePopularityandProspectofFrequencyVariationSpeedControlTheelectricalmachineryexchangefrequencyconversionvelocitymo
2、dulationtechnologyistheelectricitysaving,theimprovementtechnicalprocessimprovestheproductqualityandtheimprovementenvironment,theimpetustechnologyadvancementonemainmethodnowThefrequencyconversionvelocitymodulationbyitsoutstandingvelocitymodulationandthebrakingqual
3、ity,thehighefficiency,thehighpowerfactorandtheelectricitysavingeffect,thewidespreadapplicablescopeandothermanymeritsbythedomesticgrandfatherwasthoughtmosthasthedevelopmentfuturevelocitymodulationway.Theelectricaltransmissioncontrolsystemusuallybytheelectricmotor,
4、thecontroldeviceandtheinformationinstalls3partstobecomposed,theelectricaltransmissionrelatesusestheelectricmotorbytosavetheelectricalenergyandtocontrolthemachineryreasonablytheoperatingcondition,therealizationelectricalenergy-mechanicalenergytransformation,achiev
5、es,thehighproduction,thelowconsumptiongoalhighquality.Theelectricaltransmissiondividesintodoesnotmodulatevelocityandmodulatesvelocitytwobigkinds,thevelocitymodulationisdividedtheexchangetomodulatevelocityandtodirectcurrentmodulatesvelocitytwoways.Thevariablespeed
6、motordirectlydoesnotsupplypowerbytheelectricalnetworkButthemachinerywhichdoesnotmodulatevelocityalongwithelectricpowerelectronictechnologydevelopmentthiskindoforiginalmanuscriptmoreandmoremanychangestothevelocitymodulationtransmissionbytosavetheelectricalenergyTh
7、eimprovementproductquality,enhancestheoutputThereforethevelocitymodulationtransmissionisanimportantprofession,alreadyobtainedthecountrytotake,atpresenthadcertainscale.Inrecentyearsexchangedinthevelocitymodulationmosttobeactive,todevelopquickestisthefrequencyconve
8、rsionvelocitymodulationtechnology,thefrequencyconversionvelocitymodulationisexchangesthevelocitymodulationfoundationandthebranchcontent.Thelastcenturytransform
