Rov qab electromotive quab yuam yog tsim los ntawm kev tawm tsam qhov nyiam ntawm qhov tam sim no hauv winding hloov. Rov qab electromotive quab yuam yog tsim nyob rau hauv cov xwm txheej hauv qab no: (1) thaum muaj kev hloov tam sim no dhau los ntawm lub kauj; (2) Thaum tus neeg xyuas pib muab tso rau hauv qhov chaw sib nqus sib nqus; (3) Thaum tus neeg xyuas pib txiav los ntawm cov hlau nplaum. Thaum cov khoom siv hluav taws xob xws li relay coils, electromagnetic li qub, contactor coils, thiab lub cev muaj zog windings ua haujlwm, lawv txhua tus tsim hluav taws xob quab yuam.
Lub cim ntawm kev ruaj khov tam sim no yuav tsum muaj ob yam tsim nyog: ua ntej, lub voj kaw kaw. Thib ob, rov qab electromotive quab yuam. Peb tuaj yeem nkag siab qhov tshwm sim ntawm induced electromotive quab yuam los ntawm induction lub cev muaj zog: peb-theem symmetrical voltages yog siv rau stator windings ntawm lub cev muaj zog nrog qhov sib txawv ntawm 120 degrees, tsim ib ncig rotating magnetic teb, kom cov rotor tuav tso rau hauv no. rotating magnetic teb yog raug rau electromagnetic quab yuam, hloov los ntawm zoo li qub mus rau rotating motion, generating induced muaj peev xwm nyob rau hauv cov tuav, thiab induced tam sim no ntws los ntawm lub kaw voj ntawm tuav txuas los ntawm lub conductive kawg rings. Nyob rau hauv txoj kev no, lub zog hluav taws xob lossis hluav taws xob hluav taws xob yog tsim nyob rau hauv cov rotor tuav, thiab lub zog hluav taws xob no yog qhov hu ua rov qab electromotive quab yuam. Nyob rau hauv lub qhov txhab rotor lub cev muaj zog, lub rotor qhib Circuit Court voltage yog ib tug raug rov qab electromotive quab yuam.
Ntau hom motors muaj qhov sib txawv kiag li ntawm qhov loj ntawm lub nraub qaum electromotive quab yuam. Qhov loj ntawm lub nraub qaum electromotive quab yuam ntawm lub asynchronous lub cev muaj zog hloov nrog lub load loj txhua lub sijhawm, ua rau muaj qhov sib txawv ntawm qhov ntsuas qhov sib txawv hauv qhov sib txawv load; Nyob rau hauv ib tug ruaj khov hlau nplaum lub cev muaj zog, tsuav yog qhov ceev tseem tsis hloov, qhov luaj li cas ntawm lub rov qab electromotive quab yuam tseem tsis hloov, yog li ntawd cov efficiency qhia nyob rau hauv txawv load tej yam kev mob nyob twj ywm tsis hloov.
Lub ntsiab lus ntawm lub zog rov qab electromotive yog lub zog hluav taws xob uas tawm tsam qhov kev hla ntawm tam sim no lossis kev hloov pauv tam sim no. Nyob rau hauv lub zog hluav taws xob hloov dua siab tshiab kev sib raug zoo UIt = ε逆It + I2Rt, UIt yog lub zog hluav taws xob input, xws li lub zog hluav taws xob input rau lub roj teeb, lub cev muaj zog lossis transformer; I2Rt yog qhov hluav taws xob poob hluav taws xob hauv txhua qhov hluav taws xob, uas yog hom hluav taws xob poob hluav taws xob, qhov me dua qhov zoo; Qhov sib txawv ntawm cov khoom siv hluav taws xob hluav taws xob thiab hluav taws xob poob hluav taws xob yog ib feem ntawm lub zog muaj txiaj ntsig ε逆 Nws sib raug rau lub zog hluav taws xob rov qab. Hauv lwm lo lus, lub zog hluav taws xob rov qab yog siv los tsim lub zog muaj txiaj ntsig thiab sib cuam tshuam nrog cov cua sov poob. Qhov ntau dua qhov kub poob zog, qhov me dua qhov ua tau zoo zog.
Lub hom phiaj hais lus, lub nraub qaum EMF siv lub zog hluav taws xob hauv Circuit Court, tab sis nws tsis yog "poob". Ib feem ntawm cov hluav taws xob hluav taws xob sib raug rau sab nraub qaum EMF yuav raug hloov mus rau hauv lub zog muaj txiaj ntsig rau cov khoom siv hluav taws xob, xws li lub zog hluav taws xob ntawm lub cev muaj zog thiab tshuaj lom neeg lub zog ntawm lub roj teeb.
Nws tuaj yeem pom tau tias qhov loj ntawm lub nraub qaum EMF txhais tau hais tias lub zog ntawm cov khoom siv hluav taws xob muaj peev xwm hloov tag nrho cov khoom siv hluav taws xob rau hauv lub zog muaj txiaj ntsig, qhia txog qib ntawm cov khoom siv hluav taws xob hloov dua siab tshiab.
Cov yam ntxwv uas txiav txim siab rov qab EMF Rau cov khoom siv lub cev muaj zog, tus naj npawb ntawm stator winding lem, lub rotor angular tshaj tawm, cov hlau nplaum tsim los ntawm cov hlau nplaum rotor, thiab cov cua sib txawv ntawm stator thiab rotor yog yam uas txiav txim siab EMF ntawm lub cev muaj zog. . Thaum lub cev muaj zog tsim, lub rotor magnetic teb thiab tus naj npawb ntawm lem ntawm stator winding yog txiav txim. Yog li ntawd, tsuas yog qhov tseem ceeb uas txiav txim siab rov qab EMF yog lub rotor angular tshaj tawm, lossis rotor ceev. Raws li lub rotor ceev nce, rov qab EMF kuj nce. Qhov sib txawv ntawm stator puab txoj kab uas hla thiab lub rotor txheej txoj kab uas hla yuav cuam tshuam qhov loj ntawm winding lub magnetic flux, uas kuj yuav cuam tshuam rau sab nraum EMF.
Tej yam uas yuav tsum tau nco ntsoov thaum lub cev muaj zog khiav ● Yog hais tias lub cev muaj zog nres rotating vim cov neeg kho tshuab tsis kam, tsis muaj rov qab electromotive quab yuam nyob rau lub sij hawm no. Lub coil nrog me me tsis kam yog ncaj qha txuas mus rau ob kawg ntawm lub hwj chim mov. Qhov tam sim no yuav loj heev, uas tuaj yeem yooj yim hlawv lub cev muaj zog. Lub xeev no yuav ntsib nyob rau hauv qhov kev xeem ntawm lub cev muaj zog. Piv txwv li, qhov kev ntsuam xyuas qhov chaw yuav tsum muaj lub cev muaj zog rotor kom nyob twj ywm hauv lub xeev. Lub sijhawm no, lub cev muaj zog loj heev thiab nws yooj yim rau hlawv lub cev muaj zog. Tam sim no, feem ntau cov tuam txhab tsim hluav taws xob siv tam sim no tus nqi sau rau qhov chaw kuaj, uas yeej zam qhov teeb meem ntawm lub cev muaj zog hlawv los ntawm lub sijhawm ntev. Txawm li cas los xij, txij li txhua lub cev muaj zog cuam tshuam los ntawm ntau yam xws li kev sib dhos, cov txiaj ntsig tau sib txawv heev thiab tsis tuaj yeem cuam tshuam txog lub xeev pib ntawm lub cev muaj zog.
● Thaum lub hwj chim muab hluav taws xob txuas nrog lub cev muaj zog qis dua li qhov qub voltage, lub cev muaj zog yuav tsis tig, tsis muaj hluav taws xob rov qab yuav raug tsim tawm, thiab lub cev muaj zog yuav hlawv tawm yooj yim. Qhov teeb meem no feem ntau tshwm sim hauv cov motors siv nyob rau hauv ib ntus kab. Piv txwv li, cov kab ib ntus siv cov khoom siv hluav taws xob. Vim tias lawv siv ib zaug thiab tiv thaiv tub sab nyiag, feem ntau ntawm lawv yuav siv cov hlau nplaum txhuas rau kev tswj tus nqi. Nyob rau hauv txoj kev no, qhov hluav taws xob poob ntawm kab yuav loj heev, uas ua rau tsis txaus input voltage rau lub cev muaj zog. Lawm, lub zog electromotive rov qab yuav tsum yog me me. Hauv qhov xwm txheej hnyav, lub cev muaj zog yuav nyuaj rau pib lossis txawm tias tsis tuaj yeem pib. Txawm hais tias lub cev muaj zog pib, nws yuav khiav ntawm qhov tam sim no loj hauv lub xeev tsis zoo, yog li lub cev muaj zog yuav raug hlawv yooj yim.
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