Lub tshuab asynchronous ua haujlwm li cas thiab leej twg tsim lawv

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Yog vim li cas vim li cas cov tshuab asynchronous tau siv dav yog qhov yooj yim ntawm lawv cov qauv tsim, kev ntseeg tau thiab kev tsim khoom. Kev siv tau rau peb-theem thiab ib-theem network, muaj ntau lub zog, yooj yim ntawm kev hloov cov kev taw qhia ntawm kev sib hloov - tag nrho cov no ua rau lawv indispensable raws li drives rau ntau yam khoom siv, nrog rau cov cuab yeej tshuab thiab conveying systems.

Qhov tseem ceeb kom zoo dua uas cov tshuab asynchronous muaj yog lawv cov kev ua haujlwm siab.

Cov tshuab hluav taws xob ntau tshaj plaws yog kilowatt, lawv siv dav heev, hauv yuav luag txhua lub tuam txhab lag luam lawv tsim cov khoom siv tsav tsheb feem ntau.

Asynchronous electric machines tau txais lawv lub npe vim tias lawv cov angular tshaj tawm nyob ntawm qhov loj ntawm cov khoom siv thauj khoom ntawm lub ncej. Tsis tas li ntawd, qhov siab dua qhov tsis kam rau torque, ib txwm nws tig qeeb dua. Lub lag luam ntawm angular tshaj tawm ntawm rotor los ntawm qhov zaus ntawm kev sib hloov ntawm cov hlau nplaum tsim los ntawm qhov tam sim no dhau los ntawm stator windings yog hu ua plam. Nws yog xam, raws li txoj cai, raws li tus nqi txheeb ze:

S=(ωn-ωp)/ ωn

Qhov twg:

ωn - magnetic teb kev sib hloov ceev, rpm;

ωp - rotor ceev, rpm.

Qhov kev vam khom ntawm tus txheeb ze tus nqi ntawm kev poob rau ntawm lub nra ntawm lub ncej yog tshwm sim tshwj xeeb hauv qhov tseeb tias nyob rau hauv hom tsis siv S yog xyaum sib npaug rau xoom.

Cov cuab yeej ntawm lub tshuab asynchronous yog tib yam li lwm lub tshuab hluav taws xob lossis lub tshuab hluav taws xob. Sab hauv ntawm lub stator yog nruab nrog tshwj xeeb grooves rau hauv uas lub windings tau nteg (nyob rau hauv cov ntaub ntawv ntawm peb-theem fais fab mov, muaj peb ntawm lawv, thiab rau ib-theem motors - ob). Lub rotor kuj yog ib qho yooj yim, nrog rau ib tug squirrel-cage tsim, thiab cov windings yog luv luv los yog muaj rings.

Nyob rau hauv rooj plaub ntawm squirrel-cage rotor vim inductive pickup los ntawm stator tam sim no, EMF tshwm sim nyob rau hauv lub rotor windings raws li txoj cai tes. Tsis tas li ntawd, txhua yam yog yooj yim: ob lub thav duab los ntawm cov hluav taws xob tam sim no pib sib cuam tshuam nrog ib leeg, thiab lub zog torque tshwm.

Asynchronous cov cav tov, lub rotor uas tau nruab nrog cov ntiv tes xoo, ua hauj lwm yooj yim dua: lub zog rau lub rotating windings yog muab ncaj qha los ntawm cov graphite txhuam. Cov rotors no tseem hu ua theem rotors.

Ib-theem asynchronous motors muaj ob lub windings, ua haujlwm thiab pib, tsim los tsim kom muaj qhov pib torque thiab tig lub rotor mus rau lub voj voog ua haujlwm.ceev. Cov motors no yog siv nyob rau qhov chaw peb-theem network tsis muaj, piv txwv li, los tsav cov kev sib hloov ntawm cov khoom siv hauv tsev.

Ntxiv rau cov motors, cov tshuab ntawm lub hom phiaj sib txawv, cov tshuab hluav taws xob, yog asynchronous. Lawv cov cuab yeej yuav luag zoo ib yam. Rau qhov credit ntawm Lavxias teb sab hluav taws xob engineering, peb tuaj yeem ntseeg siab hais txog qhov tseem ceeb ntawm peb lub teb chaws hauv kev lag luam hluav taws xob ntawm hom no. M. O. Dolivo-Dobrovolsky rov qab rau xyoo 1889 yog thawj zaug hauv ntiaj teb siv lub zog peb-theem thiab tau txais cov hlau nplaum sib hloov. Cov tshuab asynchronous niaj hnub no yog qhov tseem ceeb tsis txawv ntawm thawj peb-theem hluav taws xob lub cev muaj zog ntawm tus kws tshaj lij Lavxias thiab tus kws tshawb fawb zoo.