Keeb kwm ntawm hluav taws xob motors hnub rov qab mus rau 1820, thaum Hans Christian Oster nrhiav tau cov magnetic nyhuv ntawm hluav taws xob tam sim no, thiab ib xyoo tom qab ntawd Michael Faraday nrhiav electromagnetic rotation thiab tsim thawj thawj DC lub cev muaj zog.Faraday nrhiav tau electromagnetic induction nyob rau hauv 1831, tab sis nws tsis yog kom txog rau thaum 1883 Tesla invented lub induction (asynchronous) lub cev muaj zog.Niaj hnub no, hom tseem ceeb ntawm cov tshuab hluav taws xob tseem zoo ib yam, DC, induction (asynchronous) thiab synchronous, tag nrho raws li kev xav tau tsim thiab pom los ntawm Alstead, Faraday thiab Tesla ntau tshaj li ib puas xyoo dhau los.
Txij li thaum tsim lub induction lub cev muaj zog, nws tau dhau los ua lub cev muaj zog tshaj plaws niaj hnub no vim qhov zoo ntawm induction lub cev muaj zog dua lwm cov motors.Lub ntsiab kom zoo dua yog hais tias induction motors tsis xav tau ib tug hluav taws xob kev twb kev txuas ntawm qhov chaw nres tsheb thiab rotating qhov chaw ntawm lub cev muaj zog, yog li ntawd, lawv tsis xav tau ib tug neeg kho tshuab commutators (brushes) thiab lawv yog cov txij nkawm dawb motors.Induction motors kuj muaj cov yam ntxwv ntawm lub teeb yuag, tsis tshua muaj inertia, kev ua haujlwm siab, thiab muaj zog tshaj lub peev xwm.Yog li ntawd, lawv yog cov pheej yig dua, muaj zog dua, thiab tsis poob ntawm kev kub ceev.Tsis tas li ntawd, lub cev muaj zog tuaj yeem ua haujlwm hauv qhov chaw tawg tsis muaj qhov tawg.
Xav txog tag nrho cov txiaj ntsig saum toj no, induction motors yog suav tias yog lub zog hluav taws xob zoo tshaj plaws, txawm li cas los xij, lub zog siv hluav taws xob feem ntau xav tau ntawm qhov sib txawv ntawm qhov ceev, qhov kev tswj ceev tsis yog qhov tsis tseem ceeb.Tib txoj hauv kev zoo los ua kom muaj kev hloov pauv tsis hloov pauv yog muab peb-theem voltage nrog qhov sib txawv thiab qhov loj me rau lub cev muaj zog asynchronous.Lub rotor ceev nyob ntawm qhov ceev ntawm lub rotating magnetic teb muab los ntawm stator, yog li yuav tsum tau hloov zaus.Yuav tsum muaj qhov sib txawv voltage, lub cev muaj zog impedance raug txo qis ntawm cov zaus tsawg, thiab tam sim no yuav tsum raug txwv los ntawm kev txo cov khoom siv hluav taws xob.
Ua ntej qhov kev tshwm sim ntawm lub hwj chim hluav taws xob, kev ceev-txheej tswj ntawm induction motors tau ua tiav los ntawm kev hloov peb lub stator windings los ntawm delta mus rau lub hnub qub kev sib txuas, uas txo cov hluav taws xob thoob plaws lub cev muaj zog windings.Induction motors kuj muaj ntau tshaj peb stator windings tso cai rau sib txawv ntawm tus ncej khub.Txawm li cas los xij, lub cev muaj zog nrog ntau lub windings yog kim dua vim hais tias lub cev muaj zog yuav tsum muaj ntau tshaj peb qhov chaw nres nkoj thiab tsuas yog muaj kev sib cais ceev xwb.Lwm txoj hauv kev ntawm kev tswj ceev tuaj yeem ua tiav nrog lub qhov txhab rotor induction lub cev muaj zog, qhov twg lub rotor winding xaus yog coj mus rau hauv lub nplhaib.Txawm li cas los xij, txoj hauv kev no pom meej tshem tawm feem ntau ntawm qhov zoo ntawm induction motors, thaum tseem qhia txog kev poob ntxiv, uas tuaj yeem ua rau kev ua haujlwm tsis zoo los ntawm kev tso cov resistors lossis reactances hauv series thoob plaws stator windings ntawm lub induction motor.
Thaum lub sij hawm, cov txheej txheem saum toj no tsuas yog muaj los tswj kev ceev ntawm induction motors, thiab DC motors twb muaj nyob nrog infinitely variable speed drives uas tsis tsuas yog tso cai ua hauj lwm nyob rau hauv plaub quadrants, tab sis kuj them rau ib tug dav lub hwj chim.Lawv ua tau zoo heev thiab muaj kev tswj kom tsim nyog thiab txawm tias cov lus teb zoo, txawm li cas los xij, nws qhov tsis zoo yog qhov yuav tsum tau ua rau txhuam hniav.
nyob rau hauv xaus
Hauv 20 xyoo dhau los, semiconductor thev naus laus zis tau ua kom muaj kev vam meej, muab cov xwm txheej tsim nyog rau kev tsim cov tshuab tsim hluav taws xob tsim hluav taws xob.Cov xwm txheej no poob rau hauv ob pawg loj:
(1) Kev txo nqi thiab kev txhim kho kev ua haujlwm ntawm lub zog hluav taws xob hloov khoom siv.
(2) Muaj peev xwm siv cov algorithms nyuaj hauv microprocessors tshiab.
Txawm li cas los xij, qhov yuav tsum tau ua ua ntej yuav tsum tau tsim los tsim cov kev tsim nyog los tswj kev ceev ntawm induction motors uas nws qhov nyuaj, sib piv rau lawv cov kev yooj yim, tshwj xeeb tshaj yog hais txog lawv cov qauv lej (multivariate thiab nonlinear).
Post lub sij hawm: Aug-05-2022