Tus Qauv Txheej Txheem ntawm Peb -Phase Asynchronous Tsav

Ib qho peb -theem asynchronous lub cev muaj zog muaj ob qhov tseem ceeb: lub stator nyob ruaj ruaj thiab lub rotor tig. Lub rotor yog nyob rau hauv lub puab kab noj hniav ntawm lub stator thiab tau txais kev txhawb nqa los ntawm bearings mounted ntawm ob kawg shields. Txhawm rau kom ntseeg tau tias lub rotor tuaj yeem tig tau ywj pheej hauv stator, qhov sib txawv -paub tias huab cua sib txawv- yuav tsum muaj nyob nruab nrab ntawm stator thiab rotor. Lub cev muaj zog qhov sib txawv ntawm huab cua yog qhov tseem ceeb ntawm qhov ntsuas; nws qhov loj, symmetry, thiab lwm yam ntxwv ua rau muaj kev cuam tshuam rau lub cev muaj zog. Daim duab 2 qhia txog cov ntsiab lus ntawm peb -theem squirrel- tawb asynchronous lub cev muaj zog.

Stator
Lub stator suav nrog peb -theem stator windings, stator core, thiab tus ncej.
Qhov peb -theem stator windings tsim cov hluav taws xob hluav taws xob ntawm lub tshuab asynchronous; lawv ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm lub cev muaj zog thiab ua lub luag haujlwm tseem ceeb hauv kev hloov hluav taws xob rau hauv lub zog siv tshuab. Cov qauv ntawm peb -theem stator windings yog symmetrical, feem ntau featuring rau lub davhlau ya nyob twg ua -U1, U2, V1, V2, W1, thiab W2-uas yog nyob rau hauv ib lub thawv davhlau ya nyob twg nyob rau sab nrauv ntawm tus ncej. Raws li cov kev xav tau ntawm kev ua haujlwm, cov kev coj ua no tuaj yeem txuas nrog lub hnub qub (Y) lossis delta (△) kev teeb tsa.
Lub stator core tsim ib feem ntawm lub asynchronous motor lub magnetic circuit. Txij li thaum lub ntsiab magnetic teb rotates txheeb ze rau lub stator ntawm synchronous ceev, cov tub ntxhais yog tsim los ntawm ib pawg ntawm 0.5 hli -tuab, siab -permeability silicon steel laminations kom txo tau poob induced nyob rau hauv cov khoom tseem ceeb. Ob sab ntawm cov silicon steel laminations yog coated nrog ib tug insulating kua roj vanish kom txo tau eddy tam sim no poob nyob rau hauv lub tub ntxhais.
Lub thav duab (tseem hu ua vaj tse) ua haujlwm feem ntau los txhawb lub stator core; concurrently, nws withstands cov tshuaj tiv thaiv rog generated thaum lub sij hawm lub cev muaj zog ua hauj lwm nyob rau hauv load. Tsis tas li ntawd, cov cua sov tsim los ntawm kev poob hauv lub sijhawm ua haujlwm yog dissipated externally los ntawm tus ncej. Cov thav duab me me thiab nruab nrab- cov motors loj yog feem ntau nrum los ntawm cov hlau, whereas cov thav duab ntawm cov motors loj -vim lawv qhov loj me thiab cov teeb meem cuam tshuam hauv casting- feem ntau yog tsim los ntawm vuam steel daim hlau.

Rotor
Lub rotor ntawm lub cev muaj zog asynchronous muaj cov tub ntxhais rotor, lub rotor windings, thiab cov ncej.
Lub rotor core kuj yog ib feem ntawm lub cev muaj zog magnetic Circuit Court thiab kuj yog tsim los ntawm ib pawg ntawm silicon steel laminations. Tsis zoo li stator core laminations, rotor core laminations feature slots txiav rau hauv lawv qhov ncig. Thaum muab tso ua ke, cov laminations tsim ib lub rotor tub ntxhais nrog ntau yam sib txawv, zoo ib yam zoo li cov qhov ntawm nws sab nrauv cylindrical nto, tsim los rau tsev rotor windings.
Lub rotor winding yog ib feem ntawm lub induction lub cev muaj zog hluav taws xob Circuit Court. Nws muaj nuj nqi yog txiav los ntawm stator lub magnetic teb, yog li tsim ib tug induced electromotive quab yuam (EMF) thiab tam sim no; Tom qab ntawd, nyob rau hauv lub zog ntawm magnetic teb, nws ntsib ib tug quab yuam uas ua rau lub rotor tig. Raws li txoj cai, rotor windings tuaj yeem faib ua ob hom: squirrel-cage windings thiab qhov txhab-rotor windings. Cov yam ntxwv tseem ceeb ntawm ob hom rotor no yog raws li hauv qab no: tus squirrel-cage rotor nta cov qauv yooj yim, yooj yim los tsim, thiab yog ob qho tib si kev lag luam thiab ruaj khov; lub qhov txhab rotor, conversely, muaj ib tug complex qauv thiab kim kim, tab sis nws tso cai rau cov kev taw qhia ntawm sab nraud resistors rau hauv lub rotor Circuit Court los txhim kho kev pib thiab ceev - tswj kev ua tau zoo.
A squirrel-cage rotor winding muaj cov kab hluav taws xob tso rau hauv lub rotor qhov, txuas ntawm ob qho kawg los ntawm cov nplhaib kawg. Txhawm rau txuag cov hlau thiab txhawb kev tsim khoom, cov khoom siv hluav taws xob thiab cov nplhaib kawg hauv cov me me - mus rau - nruab nrab lub zog induction motors feem ntau yog tsim nyob rau hauv ib qho kev lag luam los ntawm kev tuag-casting molten aluminium. Rau siab- lub zog tsav- qhov twg kom ntseeg tau tias qhov zoo ntawm cov cam khwb cia txhuas tuaj yeem nyuaj - tooj liab tuav feem ntau muab tso rau hauv lub rotor core slots, thiab cov nplhaib kawg yog tom qab welded rau ob qho kawg. Tus squirrel-cage rotor winding ua rau tus kheej- muaj, kaw Circuit Court uas yuav tsum tsis muaj hluav taws xob sab nraud; nws lub cev zoo li lub tawb, yog li lub npe "squirrel-cage rotor."

Air Gap
Qhov sib txawv ntawm huab cua nyob rau hauv lub induction lub cev muaj zog yog heev me me; rau me me mus rau nruab nrab- lub cev muaj zog, nws feem ntau yog li ntawm 0.2 txog 2 hli. Qhov loj dua qhov sib txawv ntawm huab cua, qhov sib nqus tsis txaus siab ntau dua; yog li ntawd, tsim ib qho chaw sib nqus ntawm ib qho loj me me yuav tsum muaj qhov sib txuam loj dua tam sim no. Vim muaj qhov sib txawv ntawm cov huab cua no, qhov sib nqus Circuit Court tsis kam ntawm lub induction lub cev muaj zog yog siab dua li ntawm transformer; Raws li qhov tshwm sim, qhov excitation tam sim no xav tau los ntawm lub cev muaj zog induction yog qhov loj dua li ntawm transformer. Thaum lub transformer qhov excitation tam sim no feem ntau yog kwv yees li 3% ntawm nws cov ntsuas tam sim no, lub induction motor lub excitation tam sim no yog kwv yees li 30% ntawm nws cov ntsuas tam sim no. Txij li thaum lub excitation tam sim no yog ib tug reactive tam sim no, ib tug loj excitation tam sim no implies ...