Saib ntawm qhov sib txawv linear motors muaj thiab yuav ua li cas xaiv hom zoo rau koj daim ntawv thov.
Cov kab lus hauv qab no yog ib qho kev nthuav dav ntawm ntau hom linear motors muaj, suav nrog lawv cov qauv kev ua haujlwm, keeb kwm ntawm kev txhim kho cov hlau nplaum ruaj khov, tsim qauv rau linear motors thiab industrial sectors siv txhua hom linear motors.
Linear Motor Technology tuaj yeem yog: Linear Induction Motors (LIM) lossis Permanent Magnet Linear Synchronous Motors (PMLSM).PMLSM tuaj yeem yog cov tub ntxhais hlau lossis tsis muaj hlau.Tag nrho cov motors muaj nyob rau hauv tiaj tus los yog tubular configuration.Hiwin tau nyob rau hauv lub forefront ntawm linear motor tsim thiab raug rau 20 xyoo.
Qhov zoo ntawm Linear Motors
Lub cev muaj zog linear yog siv los muab cov lus tsa suab, piv txwv li, txav ib qho kev them nyiaj ntawm qhov kev txiav txim siab nrawm, nrawm, mus ncig thiab qhov tseeb.Txhua txoj kev siv thev naus laus zis uas tsis yog linear tsav tsav yog qee yam ntawm cov tshuab tsav los hloov cov lus tsa suab rau hauv cov lus tsa suab.Cov tshuab ua haujlwm zoo li no yog tsav los ntawm pob ntsia hlau, siv hlua lossis khib thiab pinion.Kev pabcuam lub neej ntawm tag nrho cov tsav tsheb no yog nyob ntawm qhov hnav ntawm cov khoom siv tshuab siv los hloov cov lus tsa suab rau hauv cov lus tsa suab thiab luv luv.
Lub ntsiab kom zoo dua ntawm linear motors yog muab linear motion yam tsis muaj kev siv tshuab vim huab cua yog qhov nruab nrab kis tau tus mob, yog li cov linear motors yog qhov tseem ceeb tsis muaj kev sib txhuam drives, muab theoretical unlimited kev pab cuam lub neej.Vim tias tsis muaj cov khoom siv tshuab siv los tsim cov lus tsa suab, kev nrawm nrawm yog qhov muaj peev xwm ua tau qhov twg lwm yam tsav xws li pob ntsia hlau, siv hlua lossis khib thiab pinion yuav ntsib cov kev txwv loj.
Linear Induction Tsav
Fig 1
Lub linear induction motor (LIM) yog thawj invented (US patent 782312 - Alfred Zehden nyob rau hauv 1905).Nws muaj cov "thawj" uas muaj ib pawg ntawm cov hluav taws xob steel laminations thiab ntau ntau ntawm tooj liab coils muab los ntawm peb-theem voltage thiab "secondary" feem ntau yog tsim los ntawm steel phaj thiab tooj liab lossis txhuas phaj.
Thaum thawj coils raug energized, theem nrab ua magnetized thiab ib thaj tsam ntawm eddy tam sim no yog tsim nyob rau hauv lub thib ob conductor.Qhov chaw thib ob no yuav cuam tshuam nrog thawj EMF rov qab los ua kom muaj zog.Kev taw qhia ntawm cov lus tsa suab yuav ua raws li Fleming txoj cai sab laug xws li;cov kev taw qhia ntawm kev txav yuav yog perpendicular rau cov kev taw qhia ntawm tam sim no thiab kev taw qhia ntawm teb / flux.
Fig 2
Linear induction motors muab qhov zoo ntawm tus nqi qis heev vim tias qhov thib ob tsis siv cov hlau nplaum ruaj khov.NdFeB thiab SmCo cov hlau nplaum ruaj khov yog kim heev.Linear induction motors siv cov khoom siv ntau heev, (steel, aluminium, tooj liab), rau lawv qhov thib ob thiab tshem tawm qhov kev pheej hmoo ntawm kev muab khoom.
Txawm li cas los xij, qhov tsis zoo ntawm kev siv cov kab hluav taws xob induction yog qhov muaj cov tsav rau cov motors.Thaum nws yooj yim heev los nrhiav drives rau cov hlau nplaum ruaj khov linear motors, nws nyuaj heev nrhiav drives rau linear induction motors.
Fig 3
Permanent Magnet Linear Synchronous Motors
Cov hlau nplaum ruaj khov linear synchronous motors (PMLSM) muaj qhov tseem ceeb tib yam li cov kab hluav taws xob induction motors (piv txwv li, ib txheej ntawm cov coils mounted ntawm ib pawg ntawm cov hluav taws xob hlau laminations thiab tsav los ntawm peb theem voltage).Qhov thib ob txawv.
Hloov cov phaj ntawm txhuas los yog tooj liab mounted rau ntawm lub phaj hlau, qhov thib ob yog tsim los ntawm cov hlau nplaum ruaj khov rau ntawm lub phaj hlau.Txhua tus hlau nplaum cov kev taw qhia ntawm magnetization yuav hloov nrog kev hwm rau yav dhau los raws li qhia hauv daim duab 3.
Qhov pom tseeb kom zoo dua ntawm kev siv cov hlau nplaum tas mus li yog los tsim ib qho chaw ruaj khov hauv qhov thib ob.Peb tau pom tias lub zog yog tsim los ntawm lub cev muaj zog induction los ntawm kev sib cuam tshuam ntawm thawj qhov chaw thiab qhov chaw nruab nrab uas tsuas yog muaj tom qab ib thaj chaw ntawm eddy tam sim no tau tsim nyob rau hauv theem nrab los ntawm lub cev muaj zog airgap.Qhov no yuav ua rau ncua sij hawm hu ua "slip" thiab cov lus tsa suab ntawm qhov thib ob tsis nyob rau hauv synch nrog cov thawj voltage nkag mus rau thawj.
Vim li no, induction linear motors hu ua "asynchronous".Ntawm cov hlau nplaum ruaj khov linear lub cev muaj zog, cov lus tsa suab thib ob yuav ib txwm nyob rau hauv synch nrog thawj qhov hluav taws xob vim tias qhov chaw nruab nrab yog ib txwm muaj thiab tsis muaj kev ncua.Vim li no, cov kab hluav taws xob mus tas li hu ua "synchronous".
Ntau hom hlau nplaum ruaj khov tuaj yeem siv rau ntawm PMLSM.Hauv 120 xyoo dhau los, qhov piv ntawm txhua yam khoom tau hloov pauv.Raws li niaj hnub no, PMLSMs siv NdFeB hlau nplaum lossis SmCo hlau nplaum tab sis feem coob yog siv NdFeB hlau nplaum.Daim duab 4 qhia txog keeb kwm ntawm kev txhim kho hlau nplaum ruaj khov.
Fig 4
Magnet lub zog yog tus cwj pwm los ntawm nws cov khoom siv hluav taws xob hauv Megagauss-Oersteds, (MGOe).Txog thaum nruab nrab-80 xyoo tsuas yog Steel, Ferrite thiab Alnico muaj thiab xa cov khoom siv hluav taws xob tsawg heev.SmCo hlau nplaum tau tsim nyob rau hauv thaum ntxov 1960's raws li kev ua hauj lwm los ntawm Karl Strnat thiab Alden Ray thiab tom qab ntawd coj mus muag nyob rau hauv lub lig sixties.
Fig 5
Lub zog khoom ntawm SmCo hlau nplaum yog thawj zaug ntau dua ob npaug ntawm cov khoom siv hluav taws xob ntawm Alnico hlau nplaum.Xyoo 1984 General Motors thiab Sumitomo nws tus kheej tsim NdFeB hlau nplaum, ib qho chaw ntawm Neodynium, Hlau thiab Boron.Kev sib piv ntawm SmCo thiab NdFeB hlau nplaum yog qhia hauv daim duab 5.
NdFeB hlau nplaum tsim muaj zog ntau dua li SmCo hlau nplaum tab sis muaj ntau yam rhiab heev rau qhov kub thiab txias.SmCo hlau nplaum kuj tseem tiv taus corrosion thiab kub tsawg tab sis kim dua.Thaum lub ntsuas kub khiav mus txog qhov kub siab tshaj plaws ntawm cov hlau nplaum, cov hlau nplaum pib demagnetize, thiab qhov demagnetization no tsis tuaj yeem thim rov qab.Cov hlau nplaum poob magnetization yuav ua rau lub cev muaj zog poob thiab tsis tuaj yeem ua tau raws li qhov tshwj xeeb.Yog tias cov hlau nplaum ua haujlwm qis dua qhov kub siab tshaj 100% ntawm lub sijhawm, nws lub zog yuav raug khaws cia yuav luag tsis tas li.
Vim tias tus nqi siab dua ntawm SmCo hlau nplaum, NdFeB hlau nplaum yog qhov kev xaiv zoo rau feem ntau cov motors, tshwj xeeb tshaj yog muab lub zog ntau dua.Txawm li cas los xij, rau qee qhov kev siv qhov chaw ua haujlwm kub tuaj yeem siab heev nws yog qhov zoo dua los siv cov hlau nplaum SmCo kom nyob deb ntawm qhov siab tshaj plaws ua haujlwm.
Tsim ntawm Linear motors
Lub cev muaj zog yog feem ntau tsim los ntawm Finite Element Electromagnetic Simulation.Tus qauv 3D yuav raug tsim los sawv cev rau pawg lamination, coils, hlau nplaum, thiab steel phaj txhawb cov hlau nplaum.Cua yuav ua qauv nyob ib ncig ntawm lub cev muaj zog thiab nyob rau hauv lub airgap.Tom qab ntawd cov khoom siv yuav raug nkag rau txhua yam khoom: hlau nplaum, hluav taws xob hlau, hlau, coils, thiab cua.Ib lub mesh yuav raug tsim siv H lossis P cov ntsiab lus thiab cov qauv daws teeb meem.Tom qab ntawd qhov tam sim no yog siv rau txhua lub kauj hauv cov qauv.
Fig. 6 qhia qhov tso zis ntawm ib qho kev simulation qhov twg flux hauv tesla tshwm sim.Cov txiaj ntsig tseem ceeb ntawm kev txaus siab rau kev simulation yog ntawm chav kawm Lub cev muaj zog thiab yuav muaj.Vim tias qhov kawg lem ntawm cov coils tsis tsim ib qho kev quab yuam, nws kuj tseem tuaj yeem khiav 2D simulation los ntawm kev siv 2D qauv (DXF lossis lwm hom) ntawm lub cev muaj zog xws li laminations, hlau nplaum, thiab steel phaj txhawb cov hlau nplaum.Cov zis ntawm xws li 2D simulation yuav nyob ze rau 3D simulation thiab muaj tseeb txaus los ntsuas lub cev muaj zog.
Fig 6
Lub cev muaj zog induction yuav ua qauv tib yam, xws li ntawm 3D lossis 2D qauv tab sis kev daws teeb meem yuav nyuaj dua li PMLSM.Qhov no yog vim qhov sib nqus flux ntawm PMLSM theem nrab yuav ua qauv tam sim tom qab nkag mus rau cov khoom hlau nplaum, yog li ntawd tsuas yog ib qho kev daws teeb meem yuav tsum tau ua kom tau txais tag nrho cov txiaj ntsig suav nrog lub cev muaj zog.
Txawm li cas los xij, qhov thib ob flux ntawm induction lub cev muaj zog yuav xav tau ib qho kev soj ntsuam ib ntus (txhais tau tias ntau qhov kev daws teeb meem ntawm lub sijhawm ib ntus) kom cov hlau nplaum sib nqus ntawm LIM theem nrab tuaj yeem tsim tau thiab tsuas yog tom qab ntawd lub zog tuaj yeem tau txais.Lub software siv rau Electromagnetic Finite Element Simulation yuav tsum muaj peev xwm los khiav qhov kev soj ntsuam ib ntus.
Linear Tsav theem
Fig 7
Hiwin Corporation muab cov motors linear ntawm qib tivthaiv.Nyob rau hauv cov ntaub ntawv no, tsuas yog lub linear lub cev muaj zog thiab lub thib ob modules yuav raug xa.Rau PMLSM lub cev muaj zog, cov qauv thib ob yuav muaj cov hlau phaj ntawm qhov sib txawv ntawm qhov ntev ntawm cov hlau nplaum ruaj khov yuav raug sib sau ua ke.Hiwin Corporation tseem muab cov theem ua tiav raws li qhia hauv daim duab 7.
Xws li ib theem muaj xws li ib tug ncej, linear bearings, lub cev muaj zog thawj, lub thib ob hlau nplaum, ib tug carriage rau cov neeg muas zaub mus txuas nws payload, lub encoder, thiab ib tug cable khiav.Ib theem ntawm lub cev muaj zog yuav npaj tau pib thaum xa khoom thiab ua kom lub neej yooj yim dua vim tias tus neeg siv khoom yuav tsis tas yuav tsim thiab tsim ib theem, uas yuav tsum tau muaj kev txawj ntse.
Linear Motor Stage Service Lub Neej
Lub neej kev pab cuam ntawm ib theem ntawm lub cev muaj zog yog txiav txim siab ntev dua ib theem uas tau tsav los ntawm txoj siv sia, pob ntsia hlau lossis khib thiab pinion.Cov khoom siv hluav taws xob ntawm cov theem tsis ncaj ncees yog feem ntau yog thawj cov khoom ua tsis tau vim yog kev sib txhuam thiab hnav lawv tsis tu ncua.Ib theem ntawm lub cev muaj zog yog qhov tsav ncaj qha uas tsis muaj kev sib cuag los yog hnav vim qhov nruab nrab kis tau tus mob yog huab cua.Yog li ntawd, tsuas yog cov khoom lag luam uas tuaj yeem ua tsis tiav ntawm cov theem pib lub cev muaj zog yog linear bearings lossis lub cev muaj zog nws tus kheej.
Cov kab bearings feem ntau muaj lub neej ua haujlwm ntev heev vim tias cov radial load tsawg heev.Lub neej kev pab cuam ntawm lub cev muaj zog yuav nyob ntawm qhov nruab nrab khiav kub.Daim duab 8 qhia tias lub cev muaj zog tiv thaiv lub neej ua haujlwm ntawm qhov kub thiab txias.Txoj cai yog tias kev pab cuam lub neej yuav tsum tau halved rau txhua txhua 10 degrees Celsius uas khiav kub siab tshaj qhov ntsuas kub.Piv txwv li, lub cev muaj zog rwb thaiv tsev chav F yuav khiav 325,000 teev ntawm qhov nruab nrab kub ntawm 120 ° C.
Yog li ntawd, nws tau pom zoo tias lub cev muaj zog theem yuav muaj kev pab cuam lub neej ntawm 50+ xyoo yog tias lub cev muaj zog raug xaiv, kev pabcuam lub neej uas tsis tuaj yeem ua tiav los ntawm txoj siv, pob ntsia hlau, lossis khib thiab pinion tsav theem.
Fig 8
Daim ntawv thov rau Linear Motors
Linear induction motors (LIM) feem ntau yog siv rau hauv daim ntawv thov nrog lub sijhawm mus ncig ntev thiab qhov uas yuav tsum tau muaj zog heev ua ke nrog kev kub ceev heev.Yog vim li cas rau xaiv ib tug linear induction lub cev muaj zog yog vim hais tias tus nqi ntawm cov theem nrab yuav tsum considerably qis dua yog siv ib tug PMLSM thiab nyob rau hauv high speeds lub Linear induction lub cev muaj zog efficiency siab heev, yog li ntawd lub zog me me yuav poob.
Piv txwv li, EMALS (Electromagnetic Launch Systems), siv nyob rau hauv cov dav hlau thauj mus rau lub dav hlau xa tawm yog siv linear induction motors.Thawj cov kab hluav taws xob zoo li no tau nruab rau ntawm USS Gerald R. Ford aircraft carrier.Lub cev muaj zog tuaj yeem ceev 45,000 kg lub dav hlau ntawm 240 km / h ntawm 91-meter khiav.
Lwm qhov piv txwv ntawm kev lom zem ua si.Cov kab hluav taws xob induction motors tau nruab rau ntawm qee qhov ntawm cov tshuab no tuaj yeem ua kom lub zog siab heev ntawm 0 txog 100 km / h hauv 3 vib nas this.Linear induction motor theem kuj tseem siv tau ntawm RTUs, (Robot Transport Units).Feem ntau RTUs siv khib thiab pinion drives tab sis ib lub tshuab hluav taws xob induction muaj peev xwm muab kev ua tau zoo dua, tus nqi qis dua, thiab kev pab lub neej ntev dua.
Permanent Magnet Synchronous Motors
PMLSMs feem ntau yuav siv rau hauv daim ntawv thov nrog ntau me me strokes, qis qis tab sis siab mus rau qhov tseeb heev thiab lub luag haujlwm hnyav.Feem ntau ntawm cov ntawv thov no muaj nyob rau hauv AOI (Automated Optical Inspection), semiconductor thiab laser tshuab industries.
Kev xaiv ntawm linear motor driven theem, (direct drive), muaj cov txiaj ntsig kev ua tau zoo tshaj indirect drives, (theem uas linear tsab ntawv tsa suab tau los ntawm converting rotary motion), rau kev tsim kom ntev thiab haum rau ntau industries.
Post lub sij hawm: Feb-06-2023