7 cav asynchronous
Ua ntej, AC asynchronous tsav
AC asynchronous lub cev yog ua rau AC lub cev muaj zog, cov khoom siv ua hluav taws xob, cov tshuab ua cua txias, cov tshuab cua txias, cov tshuab ntxhua khaub ncaws, cov tshuab nqus tsev, cov khib nyiab, cov cav ntxuav tais diav, cov tshuab xaws hluav taws xob thiab lwm cov khoom siv hluav taws xob , khoom me me electromechanical.
Lub tshuab asynchronous AC yog muab faib ua ib qho qis thiab ib lub tshuab AC commutator. Lub tshuab ua kom qhov khais ntxiv tseem muab faib ua ib qho qis ib qho asynchronous, ib qho AC-DC lub cav, thiab lub cav qij taws.
Tus ceev ntawm lub cav (rotor speed) tsawg tshaj qhov kev khiav ntawm qhov chaw magnetic, yog li nws yog hu ua lub cav asynchronous. Nws yeej zoo ib yam li lub tshuab pa taws. s = (ns - n) / ns. s yog tus nqi qis,
Ns yog qhov ceev ntawm magnetic thiab n yog rotor ceev.
Pib:
1. Thaum lub tshuab peb-theem asynchronous txuas nrog peb theem AC zog, peb theem theem stator winding ntws los ntawm peb-theem hlau nplaum force tsim los ntawm peb-theem symmetrical current (stator rotational magnetomotive force) thiab generates ib thaj chaw magnetic.
2. Cov teb tig magnetic muaj ib tus txheeb ze txiav txim siab nrog tus neeg tsav lub rotor. Raws li lub ntsiab cai ntawm qhov kev ua kom pom ntawm electromagnetic, tus neeg tsav lub rotor ua kom muaj kev sib tw ntawm electromotive yuam thiab ua kom muaj kev sib raug zoo tam sim no.
3. Raws li txoj cai ntawm electromagnetic force, tam sim no nqa rotor neeg xyuas yog raug rau electromagnetic quab yuam hauv magnetic teb rau daim electromagnetic torque, uas tsav lub rotor tig. Thaum lub cav xaib muaj ib qhov kev kho tsheb, nws tawm tau tawm dag zog.
Ib qho asynchronous lub cev yog ib qho AC tsav uas nws piv ntawm kev ceev ntawm lub load rau zaus ntawm kev sib txuas kab sib chaws tsis yog tas li. Nws kuj hloov nrog qhov loj ntawm lub nra. Qhov ntau dua qhov load torque, txo qhov rotor ceev. Asynous motors xws li cov khoom siv hluav taws xob, cov tshuab kom muaj ob zaug, thiab cov tshuab AC commutator. Induction motors yog cov feem ntau siv, thiab feem ntau, cov tshuab induction yog cov asynchronous motors yam tsis ua rau tsis to taub lossis tsis meej pem.
Lub stator winding ntawm lub tshuab asynchronous txuas nrog AC daim phiaj, thiab lub rotor winding tsis tas yuav tsum tau txuas nrog lwm cov hwj chim. Yog li, nws muaj qhov zoo ntawm cov qauv yooj yim, yooj yim tsim khoom, siv thiab txij nkawm, txhim khu kev lag luam, tsis tshua zoo thiab luv nqi. Asynchronous motors muaj ntau dua kev khiav hauj lwm ua haujlwm thiab ua haujlwm zoo dua qub, thiab lawv nyob ze rau kev khiav tsheb khiav ceev los ntawm tsis muaj kev thauj mus los, uas muaj peev xwm ua tau raws li kev xav tau ntawm feem ntau cov khoom siv thiab kev ua liaj ua teb. Asynchronous motors kuj yooj yim los ua kom muaj ntau yam qauv tiv thaiv kom haum rau tej qhov chaw txawv. Thaum lub asynchronous engine khiav, lub hwj huam reactive yuav tsum tau kos los ntawm kab sib chaws kom lub zog qhov ntawm cov kab sib tsoo deteriorate. Yog li, synchronous motors feem ntau yog siv rau tsav tsheb-high-power, low-speed mechanical khoom xws li pob mills thiab compressors. Txij li thaum lub zog ntawm lub cav asynchronous muaj qee yam sib txawv hauv kev ua kom nrawm nrawm nrog txoj kev ua magnetic teb, qhov kev tswj cov kev cai tswj ceev tsis yog (tshwj tsis yog rau AC commutator lub cev). Nws yog qhov pheej yig thiab yooj yim rau siv DC motors rau kev siv tsheb thauj mus los, dov mills, cov cuab yeej loj tshuab, luam ntawv thiab dyeing thiab papermaking machinery uas yuav tsum tau muaj dav thiab dav ceev ntau. Txawm li cas los xij, nrog txoj kev loj hlob ntawm cov cuab yeej hluav taws xob hluav taws xob thiab AC ceev tswj cov kev tswj, kev ceev kev tswj thiab kev lag luam ntawm asynchronous motors tsim rau kev ceev kev tswj ceev uas yog cov DC motors.
Thib ob, ib theem-theem asynchronous tsav
Ib leeg ib theem asynchronous lub cev yog tsim los ntawm ib tug stator, ib lub rotor, ib tug bearing, ib casing, xaus lub npog thiab cov zoo li.
Tus stator muaj lub hauv paus thiab lub hauv paus nrog windings. Cov tub ntxhais hlau tau tsim los ntawm laminating silicon steel los xij, thiab ob lub plhaub ntawm cov huab cua loj (tseem hu ua running windings) thiab cov kev pabcuam vav (tseem hu ua cov cua ntsawj ntshis rau hauv kev nrawm nrab) nrog 90 ° qhov kaum tawm ntawm cov hluav taws xob muaj nyob hauv qhov chaw. Lub zog winding yog txuas nrog AC zog mov, thiab lub koom haum pab winding txuas nrog rau kev hloov centrifugal S los yog tus pib lub capacitor, khiav khiav lub zog, thiab lwm yam, thiab txuas nrog lub hwj chim.
Lub rotor yog lub cage-nrum txhuas rotor, uas yog tsim los ntawm laminating hlau cores thiab casting lawv mus rau hauv tub ntxhais ntawm cov tub ntxhais hlau, thiab casting kawg rings ua ke rau luv luv-Circuit Rotor tuav mus rau hauv ib tug squirrel cage hom.
Ib leeg ib theem asynchronous lub cev muaj ntxiv faib rau ib zaug xwb tsis ua hauj lwm pib asynchronous lub cev, ib theem pib capacitor pib asynchronous lub cev, ib theem ib capacitor khiav khiav asynchronous lub cev, thiab ib theem ob theem nqi capacitor asynchronous lub cev.
Peb-theem asynchronous tsav
Cov qauv ntawm cov theem peb lub cav asynchronous yog zoo li qhov ntawm ib theem zuj zus asynchronous, thiab peb theem hluav taws xob muaj nyob hauv lub stator tub ntxhais qhov taub (cov qauv peb theem, cov txheej txheem ib zaug thiab cov ib hom kab laug sab ib txheej). Tom qab lub stator winding txuas nrog peb theem AC zog, qhov tig magnetic teb generated los ntawm cov cua tam sim no generates ib qho kev sib txuas ntawm tus neeg tsav tsheb nyob hauv rotor, thiab lub rotor generates ib qho kev hloov electromagnetic txee (ie, ib qho chaw sib tshaub asynchronous) hauv qab qhov sib cuam tshuam ntawm qhov sib luag ntawm qhov sib luag thiab qhov ntxig magnetic teb ntawm huab cua sib txawv. Hloov lub cav.
Plaub, lub hau npog lub cav
Lub ntxoov ncej ntxoo yog qhov yooj yim tshaj ntawm ib txoj kev ntawm AC-tsav, feem ntau yog caged chute cam khwb cia txhuas rotor. Raws li qhov sib txawv ntawm cov qauv ntawm tus stator, nws tseem raug muab faib ua ib qho kev sib txuas ntawm txoj kab uas muaj kev sib raug zoo ntawm tus qauv ntawm txoj kab qaum ncej.
Lub stator tseem ceeb ntawm lub tshuab pa roj carbon dioxide muaj peev xwm muaj ib lub xwmfab, xwm fab xwm yeem los yog ib puag ncig ntawm daim txiag zeb, thiab cov hlau nplaum sib luag. Txhua tus pas hlau sib nqus muaj ib los yog ob peb lub koom haum pab cuam luv luv ntawm cov tooj liab, uas yog, ib qho khoob khoob khawm. Cov cua ntsawj ntshab nyob rau sab xis tuaj yeem siv raws li qhov loj ntawm kev sib tw.
Lub stator tseem ceeb ntawm txoj kab npauj npog uas muab zais zais zis yog tib yam li qhov ntawm qhov kev ua haujlwm ib zaug xwb. Tus stator winding txais kev sib faib khoom, thiab lub ntsiab ntoo yog muab faib rau hauv lub stator qhov. Cov duab ntxoo yuav tsis xav luv luv ntawm lub nplhaib tooj liab, tab sis yog qhov mob uas muaj hlau nplaum. Cov cua ntsawj tom qab (tus kheej tau luv tom qab qhov txuas txuas) tau muab tso rau hauv lub stator slots (kwv yees li 2/3 ntawm tag nrho cov npoo) thiab ua haujlwm pab pawg. Qhov loj winding thiab lub shrouded ncej winding yog nyob rau ntawm ib qho kev txawv ntawm ib qho ntawm qhov chaw nyob rau hauv qhov chaw.
Thaum lub zog tawg ntawm txoj hlua sib tsoo lub zog ua rau lub zog, lub shrouded pole winding kuj ua rau lub caij sib dhos, ua rau tus ncej stator yuav tsum tau tig rau hauv cov kev taw qhia ntawm qhov kev siv them los ntawm feem ntawm qhov sib nqus ntawm qhov sib nqus thiab qhov quav ntawm lub shrouded ncej winding.
Tsib, Ib-theem series excitation lub cev muaj zog
Tus stator ntawm ib theem cua tshuab ua haujlwm siab heev yog tsim los ntawm cov tub ntxhais uas tuaj sab nrauv thiab ib thaj chaw ua haujlwm, thiab lub rotor yog tsim los ntawm cov tub ntxhais uas muab zais, ib qho kev sibtham, ib qho khoom sib dhos thiab ib qho kev hloov. Ib lub koob sib txuas ua ke yog tsim ntawm lub tshav puav thiab qhov sib tw ntawm kev txhuam thiab tus kws muag khoom.
Ib theem-theem siab-tsav tsheb yog AC thiab DC tsav. Nws tuaj yeem ua haujlwm nrog AC zog lossis DC zog.
