Cov Qauv Tseem Ceeb Ntawm Peb -Phase Asynchronous AC Tsav

Peb lub-theem asynchronous lub cev muaj zog muaj ob qhov tseem ceeb: lub stator ruaj thiab lub rotor tig. Lub rotor yog nyob rau hauv lub stator kab noj hniav thiab txhawb nqa los ntawm bearings ntawm ob kawg npog. Txhawm rau kom ntseeg tau tias rotor tuaj yeem tig tau ywj pheej hauv stator, qhov sib txawv, hu ua qhov sib txawv ntawm huab cua, yuav tsum muaj nyob nruab nrab ntawm stator thiab rotor. Qhov sib txawv ntawm huab cua yog qhov tseem ceeb heev ntawm lub cev muaj zog; nws qhov loj thiab symmetry cuam tshuam rau lub cev muaj zog ua haujlwm.

Stator: Lub stator muaj peb -theem stator windings, stator core, thiab tus ncej.

Peb -theem stator windings yog cov hluav taws xob hluav taws xob ntawm lub cev muaj zog asynchronous thiab ua lub luag haujlwm tseem ceeb hauv nws txoj haujlwm, yog qhov tseem ceeb hauv kev hloov hluav taws xob hluav taws xob rau hauv lub tshuab hluav taws xob. Lub stator peb-theem windings muaj ib tug symmetrical qauv, feem ntau muaj rau terminals U1, U2, V1, V2, W1, thiab W2, nyob rau hauv ib tug junction box sab nraum lub cev muaj zog ncej. Lawv txuas nrog lub hnub qub (Y) lossis delta (△) kev teeb tsa raws li xav tau. Lub stator core yog ib feem ntawm lub asynchronous motor's magnetic circuit. Vim hais tias lub ntsiab magnetic teb rotates txheeb ze rau lub stator ntawm synchronous ceev, kom txo tau poob nyob rau hauv cov tub ntxhais, nws yog ua los ntawm 0.5 hli tuab siab -permeability silicon steel los xij. Ob sab ntawm silicon steel nplooj ntawv yog coated nrog insulating kua roj vanish kom txo eddy tam sim no poob.

Lub cev muaj zog ncej, tseem hu ua lub casing, feem ntau txhawb lub stator core thiab bears cov tshuaj tiv thaiv quab yuam generated los ntawm tag nrho lub cev muaj zog nyob rau hauv load. Thaum tshav kub kub generated los ntawm kev poob thaum lub sij hawm ua hauj lwm kuj dissipated los ntawm tus ncej. Nruab nrab thiab me lub cev muaj zog thav ntawv feem ntau yog ua los ntawm cov hlau cam khwb cia. Cov motors loj, vim lawv qhov loj dua thiab qhov tsis yooj yim ntawm casting, feem ntau welded los ntawm steel daim hlau.

Lub rotor ntawm lub asynchronous lub cev muaj zog muaj rotor core, rotor windings, thiab ncej.

Lub rotor tub ntxhais tseem yog ib feem ntawm lub cev muaj zog sib nqus hluav taws xob thiab tseem ua los ntawm cov ntawv sib dhos silicon steel. Tsis zoo li stator core laminations, rotor core laminations muaj qhov txiav rau hauv lawv qhov ncig. Lub rotor core stacked muaj ntau yam zoo li lub qhov rau ntawm nws sab cylindrical nto rau tsev rotor windings.

Lub rotor windings yog lwm qhov ntawm lub asynchronous motor circuit. Lawv txoj haujlwm yog txiav cov stator magnetic teb, tsim induced electromotive quab yuam thiab tam sim no, thiab nyob rau hauv lub zog ntawm magnetic teb, ua rau lub rotor tig. Lawv cov qauv tuaj yeem muab faib ua ob hom: squirrel-cage windings thiab qhov txhab-rotor windings. Cov yam ntxwv tseem ceeb ntawm ob hom rotors no yog: squirrel-cage rotors yog qhov yooj yim hauv cov qauv, yooj yim los tsim, kev lag luam, thiab ruaj khov; qhov txhab-rotor rotors muaj cov qauv nyuaj thiab kim, tab sis sab nraud kuj tuaj yeem nkag mus rau hauv lub rotor Circuit Court los txhim kho kev pib thiab kev tswj ceev.

Tus squirrel-cage rotor winding muaj cov neeg xyuas pib muab tso rau hauv cov rotor qhov thiab cov nplhaib kawg ntawm ob qho kawg. Txhawm rau txuag cov hlau thiab txhim kho cov khoom tsim tau, tus neeg xyuas pib tuav thiab lub nplhaib kawg ntawm me me - lub zog asynchronous motors feem ntau yog cam khwb cia los ntawm molten aluminium hauv ib thooj; rau siab - fais fab motors, vim hais tias qhov zoo ntawm cam khwb cia txhuas yog ib qho nyuaj rau lav, tooj liab tuav feem ntau muab tso rau hauv lub rotor core slots, thiab kawg rings yog ces welded rau ob hnub. Tus squirrel-cage rotor windings kaw cia, tsis tas yuav muaj hluav taws xob sab nraud. Nws cov duab zoo li lub tawb, yog li lub npe.

Air Gap: Qhov sib txawv ntawm huab cua nyob rau hauv lub asynchronous lub cev muaj zog yog me me, feem ntau 0.2-2 hli rau me me thiab nruab nrab- lub cev muaj zog. Qhov sib txawv ntawm huab cua loj dua ua rau muaj kev sib nqus ntau dua, yuav tsum muaj qhov ua kom zoo dua tam sim no los ua kom muaj qhov sib nqus sib nqus. Vim yog qhov sib txawv ntawm huab cua, qhov sib nqus tsis kam ntawm lub cev muaj zog asynchronous yog ntau dua li ntawm lub tshuab hloov pauv, yog li qhov kev tawm dag zog tam sim no ntawm lub tshuab asynchronous kuj tseem loj dua. Lub excitation tam sim no ntawm lub transformer yog kwv yees li 3% ntawm nws cov ntsuas tam sim no, thaum lub asynchronous lub cev muaj zog yog kwv yees li 30% ntawm nws cov ntsuas tam sim no. Txij li thaum lub excitation tam sim no yog reactive, ib tug loj excitation tam sim no xav tau ntau dua.