AC: Scheme. Electric motors thiab AC

Nyob rau hauv no tsab xov xwm koj yuav kawm tau dab tsi fais AC, xav txog lawv cov ntaus ntawv, cov kev khiav hauj lwm hauv paus ntsiab lus, lub cheeb tsam ntawm daim ntawv thov. Nws yuav tsum tau muab sau tseg tias hnub no nyob rau hauv kev ua lag luam rau ntau tshaj 95 feem pua ntawm cov tag nrho cov siv xyaw lees paub rau asynchronous tshuab. Lawv tau txais ntau vim lub fact tias lawv muaj siab cia siab rau, lawv yuav ua tau ntev heev vim nws maintainability.

Lub hauv paus ntsiab lus ntawm cov lag luam ntawm induction motors

Yuav kom to taub li cas cov lub cev muaj zog, koj muaj peev xwm ua ib tug me ntsis xyaum ua tej yam. Ntawm cov hoob kawm, koj yuav tsum tau muaj ib tug tshwj xeeb lub cuab tam. Nruab ib lub magnet nyob rau hauv lub luaj li ib cov horseshoe kom nws tau teev nyob rau hauv tsab ntawv tsa suab los ntawm qhov kov. Raws li koj paub, cov hlau nplaum muaj ob tug. Nruab nrab ntawm lawv nws yog tsim nyog los npaj lub tog raj kheej yog ua los ntawm tooj liab. Nyob rau hauv xws li ib tug txoj kev uas nws yuav dawb do tig ib ncig ntawm nws axis. Tam sim no qhov xyaum ua tej nws tus kheej. Pib saws ib tug magnet, qhov no ua ib qho kev teb uas tsiv. Hauv lub tooj liab lub tog raj kheej pib tshwm sim eddy currents, uas dab lub teb magnet.

Raws li ib tug tshwm sim, ib tug tooj liab lub tog raj kheej pib tig nyob rau hauv cov kev taw qhia nyob rau hauv uas lub tsiv tas mus li cov hlau nplaum. Ntxiv mus, nws yog me ntsis qis ceev. Yog vim li cas rau qhov no - nyob rau tib lub ceev raws li cov kab ntawm kev quab yuam cease mus cuam tshuam nrog lub teb magnet. Lub magnetic teb rotates synchronously. Tab sis cov kev ceev ntawm lub zog ntawm cov hlau nplaum Nonsynchronous. Thiab yog hais tias ib tug me ntsis txiav txhais, asynchronous. Li no lub npe ntawm lub fais tshuab - induction lub cev muaj zog. Yog hais tias ntxhib, ces tus AC tsav Circuit Court yog kwv yees li tib yam li nyob rau hauv lub saum toj no xyaum ua tej yam. Tsuas yog tus magnetic teb uas tsim los ntawm lub stator winding.

DC motors

Lawv txawv dog dig los ntawm lub AC induction motors. Firstly, muaj muaj ib tug los yog ob tug stator winding. Ob, ib txoj kev hloov hauv lub rotor ceev yog sib txawv dog dig. Tab sis lub rotor kev sib hloov kev taw qhia reversal ntawm lub polarity hloov (nyob rau hauv asynchronous tshuab cov mains theem kev hloov chaw). Hloov ceev ntawm ib tug DC tsav rotor yog ua tau, yog tias nce los yog yuav txo cov voltage txhab khoom mus rau stator winding.

DC tsav yuav tsis khiav lag luam yog tsis muaj lub excitation winding, uas yog nyob rau hauv lub rotor. voltage kis tau tus mob no tshwm sim los ntawm txoj kev txhuam los ua ke. Qhov no yog lub feem ntau unreliable caij ntawm tsim. Txhuam ua los ntawm graphite, nws thiaj li ploj, ua rau tsis ua hauj lwm ntawm lub cev muaj zog, nws yuav tsum tau kev kho. Nco ntsoov tias lub AC thiab DC fais motors muaj tib lub ntsiab, tab sis lawv cov lug txawv considerably.

Tus tsim ntawm lub electric tsav

Zoo li lwm yam kev tsis-zoo li qub fais tshuab, ib tug asynchronous lub cev muaj zog muaj ob lub ntsiab qhov chaw - lub stator thiab lub rotor. Tus thawj lub caij tsau rau nws muab tso rau peb windings uas muaj kev cob cog nyob rau hauv ib tug tej yam qauv. Lub rotor yog rooj noj, tus tsim hu ua "nas tawb". Yog vim li cas rau qhov no lub npe yog hais tias lub hauv qauv yog zoo heev rau cov log nrog tus nas.

Cov yav tas, ntawm chav kawm, tsis yog tus tsav. centering lub rotor yog ua nrog ob tug npog, mounted rau cov stator. Lawv yog cov bearings uas pab txhawb kev sib hloov. Nyob rau nraum qab ntawm lub cev muaj zog impeller ntsia. Nrog kev pab los ntawm txias ib tug hluav taws xob tshuab yog nqa tawm. Nyob rau stator no yog ua los tav uas txhim kho lub tshav kub hloov lwm lub tsev. Yog li lub AC motors yog ua nyob rau hauv lub cev thermal regime.

Lub stator ntawm ib tug induction lub cev muaj zog

Nws yuav tsum uas sau hais tias cov stator tug ntawm cov niaj hnub asynchronous motors unexpressed. Cias muab, rau tag nrho cov sab hauv saum npoo yog zoo kawg nkaus tus. Nyob rau hauv thiaj li yuav txo cov eddy tam sim no tsis tau, cov tub ntxhais yog sau los ntawm heev nyias los xij ntawm hlau. Cov nplooj ntawv yog heev ze rau txhua lwm yam thiab tom qab tsau rau hauv vaj tse ua los ntawm steel. Lub stator muaj grooves rau tso lub windings.

Lub windings no yog ua los ntawm tooj liab hlau. Txuas lawv yog nyob rau hauv ib tug "lub hnub qub" los yog "daim duab peb sab". Nyob rau hauv lub qaum kev ib lub cev muaj ib tug me me ntaub thaiv npog, kiag li cais. Muaj kev sib ntsib thiab sib txuas rau txuas lub windings. Thiab koj muaj peev xwm txuas qhov winding siv jumpers ntsia tau rau hauv lub vaj huam sib luag. Tus ntaus ntawv yog ib qho AC tsav enables ceev kev twb kev txuas ntawm lub windings nyob rau hauv cov yam qauv.

Rotor induction lub cev muaj zog

Hais txog nws nws yog heev me ntsis yog hais tias. Nws zoo li ib tug nas tawb. Lub rotor tsim yog tau koom ua ke los ntawm nyias hlau los xij, raws li zoo raws li lub stator. Lub rotor slots yog winding, tab sis nws yuav ua tau ntawm ob peb hom. Tag nrho cov nyob ntawm lub theem los yog tus nas ncuav-tawb rotor. Cov feem ntau tseeb designs. Tuab tooj liab rods yog muab tso rau hauv lub grooves tsis insulating cov ntaub ntawv uas. Nyob rau ob hnub ntawm lub rods yog kev cob cog rua nrog tooj liab rings. Tej zaum, tsis txhob siv lub "nas tawb" siv hlau rotors.

Tab sis tseem muaj AC motors nrog plam-ntiv nplhaib motors. Lawv siv ntau tsawg feem ntau, mas fais motors, uas muaj siab heev lub hwj chim. Qhov thib ob cov ntaub ntawv, nyob rau hauv uas nws yog tsim nyog los siv lub ris hauv qab-ntiv nplhaib motors nyob rau hauv hluav taws xob motors - cov creation ntawm ib tug ntau ntawm kev rau siab nyob rau ntawm lub lub sij hawm ntawm lub community launch. Txawm li cas los, qhov no nws yog tsim nyog los siv ib tug tshwj xeeb rheostat.

Txoj kev pib induction lub cev muaj zog

Khiav AC asynchronous lub cev muaj zog yog yooj yim, koj tsuas muaj mus cuag cov stator windings nyob rau hauv ib tug peb-theem network. Kev twb kev txuas yog ua nrog rau qhov kev pab los ntawm magnetic contactors. Ua tsaug rau lawv, koj yuav tau yuav luag automate pib. Txawm qhov rov qab yuav ua tau tsis ntau heev teeb meem. Tab sis tej zaum nws yog tsim nyog los txo cov voltage uas yog thov mus rau lub stator windings.

Qhov no yog ua los ntawm kev siv ntawm kev twb kev txuas kos duab ntawm lub "daim duab peb sab". Nyob rau hauv no start-up yog thaum lub windings kev cob cog rua nyob rau hauv ib tug "lub hnub qub". Nrog ua ceev, xeeb qhov yuav tsum tau hloov mus rau "delta" Circuit Court lub siab tshaj plaws winding. Yog li muaj ib tug yuav txo tau nyob rau hauv ntim tam sim no uas hais txog peb lub sij hawm. Tab sis yuav tsum paub hais tias tsis yog txhua txhua stator yuav ua kom zoo thaum kev cob cog rua raws li lub tswvyim "daim duab peb sab".

Ceev tswj

Nyob rau hauv kev lag luam thiab lub neej txhua hnub yog ua nce nrov zaus converters. Lawv yuav ua tau me ntsis zog ntawm ob txhais tes mus hloov lub rotor kev sib hloov ceev. Nws yuav tsum tau muab sau tseg tias AC motors yog siv nyob rau hauv ua ke nrog zaus converters nyob rau hauv feem ntau mechanisms. Nws tso cai rau koj mus nplua-tune tus tsav, nws tsis yog tsim nyog los siv magnetic actuators. Tag nrho cov ntawm lwm yam uas yog kev cob cog rua rau lub terminals ntawm lub zaus inverter. Chaw tso cai rau koj yuav hloov lub sij hawm ntawm acceleration ntawm lub cev muaj zog rotor, nres nws, thaum lub sij hawm yam tsawg kawg nkaus thiab siab tshaj plaws ceev, raws li zoo li ntau lwm tiv thaiv zog.

xaus

Tam sim no koj paub yuav ua li cas mus ua hauj lwm AC tsav tshwm sim. Txawm lub feem ntau nrov kawm tsim ntawm lub induction lub cev muaj zog. Nws yog ib lub uas pheej yig tshaj ntawm tag nrho cov, uas yog nyob rau hauv lub lag luam. Nyob rau hauv tas li ntawd, rau tej kev lag luam yog tsis muaj yuav tsum tau siv txawv koom haum pab kiag li lawm. Nyob rau hauv kev, lub dimmers. Thiab tsuas xws li ib tas li ntawd, raws li lub zaus converter, yuav pab txhawb lag luam ntawm lub induction lub cev muaj zog, nthuav nws cov tuition heev.