Peb-theem asynchronouslub cev muaj zogyog ib hom induction lub cev muaj zog uas yog siv los ntawm ib txhij txuas 380V peb-theem AC tam sim no (theem sib txawv ntawm 120 degrees). Vim lub fact tias lub rotor thiab stator rotating magnetic teb ntawm peb-theem asynchronous lub cev muaj zog rotate nyob rau hauv tib txoj kev thiab nyob rau hauv sib txawv speeds, muaj ib tug plam tus nqi, yog li nws yog hu ua peb-theem asynchronous lub cev muaj zog.
Qhov ceev ntawm lub rotor ntawm peb-theem asynchronous lub cev muaj zog yog qis dua qhov ceev ntawm qhov sib nqus sib nqus. Lub rotor winding generates electromotive quab yuam thiab tam sim no vim qhov txheeb ze zog nrog lub magnetic teb, thiab interacts nrog magnetic teb los tsim electromagnetic torque, ua tiav lub zog transformation.
Piv nrog ib-theem asynchronouslub cev muaj zog, peb-theem asynchronouslub cev muaj zogmuaj kev ua haujlwm zoo dua qub thiab tuaj yeem txuag tau ntau yam ntaub ntawv.
Raws li cov qauv rotor sib txawv, peb-theem asynchronous motors tuaj yeem muab faib ua hom tawb thiab hom kab mob.
Lub asynchronous lub cev muaj zog nrog lub tawb rotor muaj cov qauv yooj yim, txhim khu kev lag luam, lub teeb yuag, thiab tus nqi qis, uas tau siv dav heev. Nws lub ntsiab drawback yog qhov nyuaj hauv kev tswj ceev.
Lub rotor thiab stator ntawm lub qhov txhab peb-theem asynchronous lub cev muaj zog kuj tau nruab nrog peb-theem windings thiab txuas nrog rau sab nraud rheostat los ntawm cov hlua khi, txhuam. Kho qhov tsis kam ntawm rheostat tuaj yeem txhim kho qhov pib ua haujlwm ntawm lub cev muaj zog thiab kho qhov nrawm ntawm lub cev muaj zog.
Lub hauv paus ntsiab lus ua haujlwm ntawm peb-theem asynchronous lub cev muaj zog
Thaum symmetrical peb-theem alternating tam sim no yog siv rau peb-theem stator winding, ib tug rotating magnetic teb yog generated uas rotates clockwise raws lub puab ncig qhov chaw ntawm lub stator thiab rotor ntawm synchronous ceev n1.
Txij li thaum lub rotating magnetic teb rotates ntawm n1 ceev, lub rotor neeg xyuas pib nyob twj ywm nyob rau hauv thaum pib, yog li ntawd tus neeg xyuas pib rotor yuav txiav lub stator rotating magnetic teb los tsim induced electromotive quab yuam (kev taw qhia ntawm induced electromotive quab yuam yog txiav txim los ntawm txoj cai-tes. txoj cai).
Vim lub luv luv Circuit Court ntawm lub rotor conductor ntawm ob qho kawg los ntawm lub nplhaib luv luv, nyob rau hauv qhov kev txiav txim ntawm induced electromotive quab yuam, rotor neeg xyuas pib yuav tsim ib tug induced tam sim no uas yog yeej nyob rau hauv tib txoj kev raws li induced electromotive quab yuam. Tam sim no nqa tus neeg xyuas pib ntawm lub rotor yog raug rau electromagnetic quab yuam nyob rau hauv stator magnetic teb (kev taw qhia ntawm lub zog yog txiav txim siab siv txoj cai sab laug). Electromagnetic quab yuam generates electromagnetic torque ntawm lub rotor ncej, tsav lub rotor tig nyob rau hauv cov kev taw qhia ntawm lub rotating magnetic teb.
Los ntawm cov kev soj ntsuam saum toj no, nws tuaj yeem txiav txim siab tias txoj cai ua haujlwm ntawm lub tshuab hluav taws xob yog raws li hauv qab no: thaum peb-theem stator windings ntawm lub cev muaj zog (txhua qhov sib txawv ntawm 120 degree hluav taws xob lub kaum sab xis) tau pub nrog peb-theem symmetrical alternating tam sim no. , ib tug rotating magnetic teb yog generated, uas txiav lub rotor winding thiab generates induced tam sim no nyob rau hauv lub rotor winding (lub rotor winding yog ib tug kaw Circuit Court). Tam sim no nqa rotor neeg xyuas pib yuav tsim hluav taws xob quab yuam nyob rau hauv qhov kev txiav txim ntawm stator rotating magnetic teb, yog li, electromagnetic torque yog tsim nyob rau hauv lub cev muaj zog ncej, tsav lub cev muaj zog tig nyob rau hauv tib txoj kev raws li lub rotating magnetic teb.
Wiring daim duab ntawm peb-theem asynchronous lub cev muaj zog
Basic thaiv ntawm peb-theem asynchronous motors:
Lub rau lub xov hlau los ntawm winding ntawm peb-theem asynchronous lub cev muaj zog tuaj yeem muab faib ua ob txoj hauv kev sib txuas: delta delta kev sib txuas thiab kev sib txuas hnub qub.
Rau xov hlau = peb lub cev muaj zog windings = peb lub taub hau kawg + peb tus Tsov tus tw kawg, nrog ib tug multimeter ntsuas kev sib txuas ntawm lub taub hau thiab tus Tsov tus tw kawg ntawm tib winding, piv txwv li U1-U2, V1-V2, W1-W2.
1. Daim duab peb sab delta kev sib txuas txoj kev rau peb-theem asynchronous motors
Daim duab peb sab delta kev sib txuas txoj kev yog txuas lub taub hau thiab tails ntawm peb windings nyob rau hauv ib ntus los ua ib daim duab peb sab, raws li qhia hauv daim duab:
2. Star kev twb kev txuas txoj kev rau peb-theem asynchronous motors
Txoj kev sib txuas hnub qub yog txuas rau tus Tsov tus tw lossis lub taub hau kawg ntawm peb lub voj voog, thiab lwm yam peb cov xov hlau siv los ua kev sib txuas hluav taws xob. Txoj kev sib txuas raws li qhia hauv daim duab:
Kev piav qhia ntawm Daim duab kab hluav taws xob ntawm Peb Theem Asynchronous Tsav hauv cov duab thiab cov ntawv
Peb theem motor junction box
Thaum peb-theem asynchronous lub cev muaj zog txuas nrog, txoj kev sib txuas ntawm cov khoom sib txuas hauv lub thawv sib txuas yog raws li hauv qab no:
Thaum peb-theem asynchronous lub cev muaj zog yog kaum kev sib txuas, txoj kev sib txuas ntawm lub thawv sib txuas yog raws li hauv qab no:
Muaj ob txoj kev sib txuas rau peb-theem asynchronous motors: kev sib txuas hnub qub thiab daim duab peb sab.
Txoj kev triangulation
Nyob rau hauv winding coils nrog tib lub voltage thiab hlau txoj kab uas hla, lub hnub qub kev twb kev txuas txoj kev muaj peb zaug tsawg lem ntawm ib theem (1.732 zaug) thiab peb zaug tsawg zog tshaj peb zaug kev twb kev txuas txoj kev. Txoj kev sib txuas ntawm lub tshuab ua tiav tau raug kho kom tiv taus qhov hluav taws xob ntawm 380V thiab feem ntau tsis haum rau kev hloov kho.
Txoj kev sib txuas tsuas tuaj yeem hloov pauv thaum theem peb-theem voltage txawv ntawm qhov qub 380V. Piv txwv li, thaum peb theem voltage yog 220V, hloov lub hnub qub kev twb kev txuas txoj kev ntawm tus thawj peb-theem voltage 380V rau daim duab peb sab kev twb kev txuas txoj kev yuav siv tau; Thaum peb theem voltage yog 660V, thawj peb-theem voltage 380V delta kev twb kev txuas txoj kev yuav hloov mus rau lub hnub qub kev twb kev txuas txoj kev, thiab nws lub hwj chim tseem tsis hloov. Feem ntau, cov tshuab hluav taws xob qis yog lub hnub qub txuas nrog, thaum lub zog loj motors yog delta txuas.
Ntawm qhov ntsuas voltage, lub delta txuas lub cev muaj zog yuav tsum tau siv. Yog tias nws hloov mus rau lub hnub qub txuas nrog lub cev muaj zog, nws koom nrog kev ua haujlwm txo qis, ua rau txo qis hauv lub cev muaj zog thiab pib tam sim no. Thaum pib lub tshuab hluav taws xob siab (delta txuas txoj kev), qhov tam sim no siab heev. Txhawm rau txo qhov cuam tshuam ntawm qhov pib tam sim no ntawm txoj kab, qhov pib-down pib feem ntau yog saws. Ib txoj hauv kev yog hloov tus thawj delta kev twb kev txuas txoj kev mus rau lub hnub qub kev twb kev txuas txoj kev pib. Tom qab lub hnub qub kev twb kev txuas yog pib, nws yog hloov dua siab tshiab rau delta kev twb kev txuas txoj kev rau lub lag luam.
Wiring daim duab ntawm peb-theem asynchronous lub cev muaj zog
Lub cev daim duab ntawm kev xa mus rau pem hauv ntej thiab thim rov qab rau peb-theem asynchronous motors:
Txhawm rau ua tiav rau pem hauv ntej thiab thim rov qab tswj lub cev muaj zog, ob theem ntawm nws cov khoom siv hluav taws xob tuaj yeem hloov kho tus txheeb ze rau ib leeg (peb hu ua commutation). Feem ntau, V theem tseem tsis hloov pauv, thiab U theem thiab W theem tau hloov kho tus txheeb ze rau ib leeg. Txhawm rau kom ntseeg tau tias theem theem ntawm lub cev muaj zog tuaj yeem hloov pauv tau zoo thaum ob lub contactors ua, cov xaim yuav tsum zoo ib yam ntawm qhov chaw nres nkoj sab saud ntawm kev sib cuag, thiab theem yuav tsum tau hloov kho ntawm qhov chaw nres nkoj qis ntawm tus contactor. Vim yog theem sib txuas sib txuas ntawm ob theem, nws yog ib qho tsim nyog los xyuas kom meej tias ob lub KM coils tsis tuaj yeem siv rau tib lub sijhawm, txwv tsis pub cov theem loj rau theem luv luv yuav tshwm sim. Yog li ntawd, kev sib txuas lus yuav tsum tau saws.
Rau kev nyab xeeb vim li cas, ob chav sib cuam tshuam rau pem hauv ntej thiab rov qab tswj Circuit Court nrog khawm interlocking (mechanical) thiab contactor interlocking (hluav taws xob) feem ntau yog siv; Los ntawm kev siv khawm interlocking, txawm hais tias lub khawm rau pem hauv ntej thiab thim rov qab yog nias ib txhij, ob lub contactors siv rau theem hloov tsis tuaj yeem siv rau ib txhij, mechanically zam theem rau theem luv circuits.
Tsis tas li ntawd, vim yog kev sib cuam tshuam ntawm cov ntawv thov contactors, tsuav yog ib qho ntawm cov contactors tau siv rau, nws qhov ntev kaw yuav tsis kaw. Li no, nyob rau hauv daim ntawv thov ntawm txhua yam thiab hluav taws xob ob interlocking, lub hwj chim mov system ntawm lub cev muaj zog tsis tuaj yeem muaj theem rau theem luv circuits, zoo tiv thaiv lub cev muaj zog thiab tsis txhob raug xwm txheej tshwm sim los ntawm theem mus rau theem luv circuits thaum lub sij hawm hloov kho, uas tuaj yeem hlawv cov tus contactor.
Post lub sij hawm: Aug-07-2023
