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1、直流電動機無級調(diào)速的實摘要摘要本設(shè)計主要是運用調(diào)速系統(tǒng)對直流電動機進行調(diào)速,使其實現(xiàn)無級的效果。此調(diào)速系統(tǒng)由主電路和控制電路兩部分組成:主電路是采用晶閘管可控整流裝置進行調(diào)速;控制電路是采用雙閉環(huán)速度電流調(diào)節(jié)方法進行反饋。系統(tǒng)采用調(diào)壓調(diào)速的調(diào)速方法可以獲得與電動機固有機械特性相互平行的人為機械特性,調(diào)速方向是基速以下,只要輸出的電壓是連續(xù)可調(diào)的,即可實現(xiàn)電動機的無級調(diào)速。雙閉環(huán)速度電流調(diào)節(jié)這種方法雖然初次頭次成本相對而言較高,但它保證了系統(tǒng)的性能,保證了對生產(chǎn)工藝要求的滿足,它既兼顧了啟動時的電流的動態(tài)過程,又保證穩(wěn)態(tài)后速度的穩(wěn)定性,在起動過程的主要階段,只有電流負反饋
2、,沒有轉(zhuǎn)速負反饋。達到穩(wěn)態(tài)后,只要轉(zhuǎn)速負反饋,不讓電流負反饋發(fā)揮主要作用很好地滿足了生產(chǎn)需要。本設(shè)計的重點也就是對ASR和ACR的設(shè)計。關(guān)鍵詞:無級調(diào)速;雙閉環(huán);ASR;ACR;晶閘管I摘要AbstractThisdesignistheuseofspeedcontrolsystemforDCmotorspeedcontroltoachievetheeffectofclass.Thisspeedcontrolsystemfromthemaincircuitandcontrolcircuitcomposedoftwoparts:themaincircuitiscontrol
3、ledrectifierthyristorspeedcontroldevice;controlcircuitinadualmethodofclosed-loopspeedfeedbackcurrentregulator.Systemspeedregulatorwiththemotorspeedcontrolmethodsavailabletoparalleltheinherentmechanicalpropertiesofartificialmechanicalproperties,speedisbelowthebasespeed,aslongastheoutputvo
4、ltageiscontinuouslyadjustable,andcanachievethelevelofnon-motortransferspeed.Two-speedclosed-loopcurrentregulationthiswaythefirsttimealthoughtheinitialcostisrelativelyhigh,butitensuresthattheperformanceofthesystemtoensurethattheproductionprocesstomeetrequirements,takeintoaccountnotonlythe
5、startofthecurrentdynamicprocess,whileensuringthatthestabilityofsteady-statevelocityinthemainphaseofstartingtheprocess,onlythecurrentnegativefeedback,nonegativefeedbackspeed.Afterreachingsteadystate,aslongasthespeedofnegativefeedback,negativefeedbackfromthecurrentgoodtoplayamajorroletomee
6、ttheproductionneeds.ThefocusofthisdesignisalsothedesignofASRandACR.Keywords:steplessspeedregulation;double-loop;ASR;ACR;SCRII目錄目錄第1章緒論.......................................................................................................11.1問題提出的意義........................................
7、.........................................................11.2國產(chǎn)直流電機簡介.............................................................................................11.3直流電動機的發(fā)展現(xiàn)狀及趨勢.........................................................................2第2章直流電動機的概述........