资源描述：
《交流变频调速技术未来前景展望》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、交流变频调速技术未来前景展望Frequencyconversionisachievedthroughthefrequencyconverter,whichiscriticaltothecapacityofthefrequencyconverter・Reasonablecapacityselectionisitselfanenergy-savingmeasure・TherearethreeeasywaystodothisbasedonexistingdataandexperienceInthecaseoftheelectricpowerdragsystem,thes
2、ystemisdividedintotwokinds:despeedregulatingsystemandacspeedregulatingsystem.Themaindifferenceisthattheexchangeofelectricpowerisexemptfromthemechanicalcommutator,whichchangesthecurrentofthedemotor・Afterthe1970s,thedevelopmentoflargescaleintegratedcircuitandcomputercontroltechnology,as
3、we11astheapplicationofmoderncontroltheory,graduallymakestheacelectricdrivesystemhaswidehighspeedrange,steadyspeedrange,highsteadyspeedprecision,fastdynamicresponse,andreversibleinfourquadrantoperationgoodtechnicalperformanee,suchasthespeedcontrolperformancecanbecomparabletodeelectricd
4、rive・Inacspeedregulatingtechnique,frequencycontrolofmotorspeedhaveabsoluteadvantages,andcontinuouslyimproveitshighperformaneeandreliability,pricesarelower,especiallythefrequencyconversionpowersavingeffectisobvious,andeasytorealizetheprocessautomation,bytheindustriesofallages・Theexcell
5、entcharacteristicofacfrequencycontrol(1)thespeedadjustmentissmoothandefficient・Atlowspeed,thecharacteristicsarehighandrelativelystable・(1)thespeedadjustmentislargeandtheprecisionishigh・(2)lowstartingcurrent,noimpactonthesystemandpowergrid.(3)thefrequencyconverterissmallandeasytoinstal
6、l,debugandrepair・Easyimplementationprocessautomation・(6)theremustbeaspecialfrequencyconversionpowersource,whichismoreexpensiveatpresent・Atconstanttorquespeedadjustment,thecapacityofthelowspeedsegmentmotorisgreatlyreduced・ComparisonwithotherspeedcontrolmethodsTherearethreekindsofspeedc
7、ontrolmethodsforacmotor:variablespeedadjustment,changespeedregulationandfrequencyconversion・Ofthese,frequencyconversionisthemostadvantageous・Thisisacomparisonoftheacfrequencyconversionanddespeedcontrolsystem・Indespeedregulatingsystem,thedemotorhastheelectricbrushandthecommutator,soitm
8、ustbe
