资源描述：
《变频技术 毕业论文外文翻译》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、附录：外文文献作者：吴尚庆原文出处：华南理工大学出版社，《变频器应用技术》FrequencyVariationSpeedControl1、TheSummaryOfFrequencyVariationSpeedControl1.1ThePopularityandProspectofFrequencyVariationSpeedControlTheelectricalmachineryexchangefrequencyconversionvelocitymodulationtechnologyistheelectricitysaving,
2、theimprovementtechnicalprocessimprovestheproductqualityandtheimprovementenvironment,theimpetustechnologyadvancementonemainmethodnowThefrequencyconversionvelocitymodulationbyitsoutstandingvelocitymodulationandthebrakingquality,thehighefficiency,thehighpowerfactorandtheel
3、ectricitysavingeffect,thewidespreadapplicablescopeandothermanymeritsbythedomesticgrandfatherwasthoughtmosthasthedevelopmentfuturevelocitymodulationway.Theelectricaltransmissioncontrolsystemusuallybytheelectricmotor,thecontroldeviceandtheinformationinstalls3partstobecomp
4、osed,theelectricaltransmissionrelatesusestheelectricmotorbytosavetheelectricalenergyandtocontrolthemachineryreasonablytheoperatingcondition,therealizationelectricalenergy-mechanicalenergytransformation,achieves,thehighproduction,thelowconsumptiongoalhighquality.Theelect
5、ricaltransmissiondividesintodoesnotmodulatevelocityandmodulatesvelocitytwobigkinds,thevelocitymodulationisdividedtheexchangetomodulatevelocityandtodirectcurrentmodulatesvelocitytwoways.ThevariablespeedmotordirectlydoesnotsupplypowerbytheelectricalnetworkButthemachineryw
6、hichdoesnotmodulatevelocityalongwithelectricpowerelectronictechnologydevelopmentthiskindoforiginalmanuscriptmoreandmoremanychangestothevelocitymodulationtransmissionbytosavetheelectricalenergyTheimprovementproductquality,enhancestheoutputThereforethevelocitymodulationtr
7、ansmissionisanimportantprofession,14alreadyobtainedthecountrytotake,atpresenthadcertainscale.Inrecentyearsexchangedinthevelocitymodulationmosttobeactive,todevelopquickestisthefrequencyconversionvelocitymodulationtechnology,thefrequencyconversionvelocitymodulationisexcha
8、ngesthevelocitymodulationfoundationandthebranchcontent.Thelastcenturytransformerappearancecausesthechangevolta
