Kawm txog Kev cuam tshuam ntawm Stator Electromagnetic Force
Lub suab nrov electromagnetic ntawm lub stator hauv lub cev muaj zog feem ntau cuam tshuam los ntawm ob yam, lub zog ntawm electromagnetic excitation quab yuam thiab cov lus teb ntawm cov qauv thiab acoustic hluav taws xob tshwm sim los ntawm qhov sib thooj excitation quab yuam.Kev tshuaj xyuas ntawm kev tshawb fawb.
Xibfwb ZQZhu los ntawm University of Sheffield, UK, thiab lwm yam. siv txoj kev tshuaj ntsuam xyuas los kawm txog lub zog electromagnetic thiab lub suab nrov ntawm cov hlau nplaum lub cev muaj zog stator, kev kawm theoretical ntawm electromagnetic quab yuam ntawm cov hlau nplaum tas mus li brushless lub cev muaj zog, thiab kev co ntawm qhov ruaj khov. magnet brushless DC lub cev muaj zog nrog 10 ncej thiab 9 qhov.Lub suab nrov yog kawm, kev sib raug zoo ntawm electromagnetic quab yuam thiab stator hniav dav yog theoretically kawm, thiab kev sib raug zoo ntawm lub torque ripple thiab optimization tshwm sim ntawm kev co thiab suab nrov yog soj ntsuam.xib fwb Tang Renyuan thiab Song Zhihuan los ntawm Shenyang University of Technology muab ib tug ua tiav analytical txoj kev los kawm cov electromagnetic quab yuam thiab nws harmonics nyob rau hauv lub mus tas li hlau nplaum lub cev muaj zog, uas muab theoretical txhawb rau kev tshawb fawb ntxiv ntawm lub suab nrov txoj kev xav ntawm lub mus tas magnet lub cev muaj zog.Lub electromagnetic vibration suab nrov yog soj ntsuam nyob ib ncig ntawm lub tas li magnet synchronous lub cev muaj zog powered los ntawm sine yoj thiab zaus converter, tus yam ntxwv zaus ntawm cov huab cua sib nqus magnetic teb, lub cev electromagnetic quab yuam thiab lub suab nrov vibration yog kawm, thiab yog vim li cas rau lub torque. ripple yog soj ntsuam.Lub torque pulsation tau simulated thiab txheeb xyuas kev sim siv lub Element, thiab lub torque pulsation nyob rau hauv txawv slot-ncej haum tej yam kev mob, raws li zoo raws li cov teebmeem ntawm huab cua sib txawv ntev, ncej arc coefficient, chamfered lub kaum sab xis, thiab qhov dav ntawm lub torque pulsation tau soj ntsuam. .Cov qauv electromagnetic radial quab yuam thiab tangential quab yuam qauv, thiab cov qauv kev sib raug zoo yog ua tiav, lub zog electromagnetic thiab kev vibration nrov teb tau raug tshuaj xyuas nyob rau hauv qhov zaus thiab cov qauv hluav taws xob acoustic raug tshuaj xyuas, thiab cov kev simulation thiab kev sim kev tshawb fawb tau ua tiav.Nws tau taw qhia tias cov hom tseem ceeb ntawm cov hlau nplaum ruaj khov stator yog qhia hauv daim duab.
Lub hom phiaj tseem ceeb ntawm cov hlau nplaum mus tas li
Tsav lub cev qauv optimization tshuabLub ntsiab sib nqus flux nyob rau hauv lub cev muaj zog nkag mus rau hauv cov huab cua sib txawv heev radially, thiab generates radial rog ntawm stator thiab rotor, ua rau electromagnetic vibration thiab suab nrov.Nyob rau tib lub sijhawm, nws tsim lub sijhawm tangential thiab axial quab yuam, ua rau tangential kev co thiab axial vibration.Nyob rau hauv ntau zaus, xws li asymmetric motors los yog ib-theem motors, lub generated tangential vibration yog heev loj, thiab nws yog ib qho yooj yim mus ua resonance ntawm cov khoom txuas nrog lub cev muaj zog, ua rau lub suab nrov radiated.Txhawm rau xam cov suab nrov hauv electromagnetic, thiab txhawm rau txheeb xyuas thiab tswj cov suab nrov no, nws yog ib qho tsim nyog yuav tsum paub txog lawv qhov chaw, uas yog lub zog nthwv dej uas ua rau muaj kev vibration thiab suab nrov.Vim li no, kev tsom xam ntawm electromagnetic force nthwv dej yog ua los ntawm kev tsom xam ntawm huab cua-gap magnetic teb.Piv txwv tias qhov sib nqus flux ntom ntom nthwv dej uas tsim los ntawm stator yog, thiab qhov sib nqus flux ntom ntom yojtsim los ntawm rotor yog, ces lawv cov sib nqus sib nqus flux ntom ntom nthwv dej hauv qhov sib txawv ntawm huab cua tuaj yeem qhia tau raws li hauv qab no:
Cov yam ntxwv xws li stator thiab rotor slotting, winding tis, input tam sim no waveform distortion, huab cua-gap permeance fluctuation, rotor eccentricity, thiab tib unbalance tag nrho yuav ua rau txhua yam deformation thiab ces vibration.Qhov chaw harmonics, lub sij hawm harmonics, slot harmonics, eccentricity harmonics thiab sib nqus saturation ntawm magnetomotive quab yuam tag nrho ua kom muaj zog dua harmonics thiab torque.Tshwj xeeb tshaj yog cov radial quab yuam nyob rau hauv AC lub cev muaj zog, nws yuav ua rau lub stator thiab rotor ntawm lub cev muaj zog tib lub sij hawm thiab tsim magnetic circuit distortion.Lub stator-thav duab thiab rotor-casing qauv yog lub ntsiab hluav taws xob qhov chaw ntawm lub cev muaj zog suab nrov.Yog hais tias lub radial quab yuam nyob ze los yog sib npaug rau lub ntuj zaus ntawm lub stator-base system, resonance yuav tshwm sim, uas yuav ua rau deformation ntawm lub cev muaj zog stator system thiab tsim kev co thiab acoustic suab nrov.Feem ntau,lub suab nrov magnetostrictive tshwm sim los ntawm qhov tsawg zaus 2f, high-order radial quab yuam yog negligible (f yog lub hauv paus zaus ntawm lub cev muaj zog, p yog tus naj npawb ntawm lub cev muaj zog ncej khub).Txawm li cas los xij, lub zog radial induced los ntawm magnetostriction tuaj yeem ncav cuag li 50% ntawm lub zog radial induced los ntawm huab cua sib txawv magnetic teb.Rau lub cev muaj zog uas tau tsav los ntawm lub inverter, vim muaj qhov muaj kev txiav txim siab lub sij hawm sib haum xeeb nyob rau hauv tam sim no ntawm nws cov stator windings, lub sij hawm harmonics yuav tsim ntxiv pulsating torque, uas feem ntau yog loj dua lub pulsating torque generated los ntawm qhov chaw harmonics.loj.Tsis tas li ntawd, qhov hluav taws xob ripple tsim los ntawm chav tsev rectifier kuj tau xa mus rau lub inverter los ntawm qhov nruab nrab Circuit Court, uas ua rau lwm hom pulsating torque.Raws li lub suab nrov electromagnetic ntawm cov hlau nplaum ruaj khov synchronous lub cev muaj kev txhawj xeeb, Maxwell quab yuam thiab magnetostrictive quab yuam yog qhov tseem ceeb ua rau lub cev muaj zog vibration thiab suab nrov.
Lub cev muaj zog stator vibration yam ntxwvLub suab nrov electromagnetic ntawm lub cev muaj zog tsis yog tsuas yog cuam tshuam nrog zaus, kev txiav txim thiab amplitude ntawm electromagnetic quab yuam yoj generated los ntawm huab cua sib nqus magnetic teb, tab sis kuj muaj feem xyuam rau lub ntuj hom ntawm lub cev muaj zog qauv.Electromagnetic suab nrov yog tsim los ntawm kev co ntawm lub cev muaj zog stator thiab casing.Yog li ntawd, kev kwv yees lub ntuj zaus ntawm stator los ntawm theoretical qauv los yog simulations ua ntej, thiab staggering lub electromagnetic quab yuam zaus thiab lub ntuj zaus ntawm lub stator, yog ib tug zoo txhais tau tias kom txo tau electromagnetic nrov.Thaum qhov zaus ntawm lub zog radial quab yuam ntawm lub cev muaj zog sib npaug los yog ze rau lub ntuj zaus ntawm ib qho kev txiav txim ntawm stator, resonance yuav tshwm sim.Lub sijhawm no, txawm tias qhov amplitude ntawm radial quab yuam yoj tsis loj, nws yuav ua rau muaj kev vibration loj ntawm stator, yog li ua rau lub suab nrov nrov electromagnetic.Rau lub suab nrov ntawm lub cev muaj zog, qhov tseem ceeb tshaj plaws yog los kawm cov hom ntuj tsim nrog radial kev co raws li lub ntsiab, qhov kev txiav txim axial yog xoom, thiab cov qauv spatial yog qis dua qhov thib rau, raws li qhia hauv daim duab.
Stator vibration form
Thaum txheeb xyuas cov yam ntxwv ntawm kev vibration ntawm lub cev muaj zog, vim muaj kev cuam tshuam tsawg ntawm damping ntawm cov qauv thiab zaus ntawm lub cev muaj zog stator, nws tuaj yeem tsis quav ntsej.Tus qauv damping yog qhov txo qis ntawm kev vibration theem nyob ze ntawm lub resonant zaus los ntawm kev siv lub zog siab dissipation mechanism, raws li qhia, thiab tsuas yog txiav txim siab ntawm lossis ze ntawm qhov resonant zaus.
damping nyhuv
Tom qab ntxiv windings rau lub stator, qhov saum npoo ntawm windings nyob rau hauv lub hlau core slot yog kho nrog cov kua roj vanish, cov ntaub ntawv insulating, kua roj vanish thiab tooj liab hlau yog txuas rau ib leeg, thiab cov ntawv insulating nyob rau hauv lub qhov yog kuj nyob ze rau cov hniav. ntawm cov tub ntxhais hlau.Yog li ntawd, nyob rau hauv-slot winding muaj ib tug tej yam nruj kev koom tes rau cov hlau core thiab tsis tuaj yeem kho raws li ib qho ntxiv.Thaum cov txheej txheem finite yog siv rau kev tsom xam, nws yog ib qho tsim nyog kom tau txais cov kev ntsuas uas ua rau muaj ntau yam khoom siv raws li cov khoom siv ntawm cov windings hauv cov cog.Thaum lub sij hawm siv cov txheej txheem, sim xyuas kom meej qhov zoo ntawm cov xim dipping, nce qhov nro ntawm lub coil winding, txhim kho qhov nruj ntawm winding thiab cov tub ntxhais hlau, ua rau kom lub zog ntawm lub cev muaj zog, ua kom lub ntuj zaus kom tsis txhob resonance, txo qhov kev vibration amplitude, thiab txo electromagnetic tsis.suab nrov.Lub ntuj zaus ntawm lub stator tom qab raug nias rau hauv lub casing yog txawv los ntawm ib tug stator core.Lub casing tuaj yeem txhim kho cov khoom zaus ntawm stator qauv, tshwj xeeb tshaj yog cov khoom siv tsawg zaus.Qhov nce ntawm kev sib hloov ceev cov ntsiab lus ua haujlwm nce qhov nyuaj ntawm kev zam resonance hauv kev tsim lub cev muaj zog.Thaum tsim lub cev muaj zog, qhov nyuaj ntawm lub plhaub qauv yuav tsum raug txo kom tsawg, thiab lub ntuj zaus ntawm lub cev muaj zog tuaj yeem nce ntxiv los ntawm qhov tsim nyog ua kom lub thickness ntawm lub plhaub kom tsis txhob muaj qhov tshwm sim ntawm resonance.Tsis tas li ntawd, nws yog ib qho tseem ceeb heev uas yuav tsum tsim kom muaj kev sib raug zoo ntawm cov tub ntxhais stator thiab cov casing thaum siv qhov kev kwv yees kawg.
Electromagnetic Analysis ntawm MotorsRaws li qhov taw qhia tseem ceeb ntawm kev tsim hluav taws xob hluav taws xob ntawm lub cev muaj zog, qhov sib nqus sib nqus feem ntau tuaj yeem cuam tshuam txog kev ua haujlwm ntawm lub cev muaj zog.Yog li ntawd, peb thawj zaug rho tawm thiab txheeb xyuas tus nqi sib nqus qhov sib nqus, thawj zaug yog txhawm rau txheeb xyuas qhov tseeb ntawm qhov simulation, thiab qhov thib ob yog los muab lub hauv paus rau kev rho tawm tom ntej ntawm electromagnetic quab yuam.Daim duab rho tawm lub cev muaj zog magnetic density cloud diagram yog qhia hauv daim duab hauv qab no.
Nws tuaj yeem pom los ntawm daim ntawv qhia huab cua tias qhov sib nqus qhov sib nqus ntawm txoj haujlwm ntawm tus choj sib nqus sib nqus yog ntau dua li qhov cuam tshuam ntawm BH nkhaus ntawm stator thiab rotor core, uas tuaj yeem ua si zoo dua sib nqus sib nqus.
Air gap flux density nkhausTshem tawm cov hlau nplaum sib nqus ntawm lub cev muaj zog cua qhov sib txawv thiab cov hniav txoj hauj lwm, kos ib qho nkhaus, thiab koj tuaj yeem pom cov txiaj ntsig tshwj xeeb ntawm lub cev muaj zog cua sib nqus sib nqus thiab cov hniav sib nqus.Cov hniav sib nqus ntawm cov hniav yog qee qhov deb ntawm cov khoom ntiag tug ntawm cov khoom siv, uas yog xav tias yog los ntawm cov hlau siab thaum lub cev muaj zog.
Motor Modal AnalysisRaws li cov qauv qauv ntawm lub cev muaj zog thiab kab sib chaws, txhais cov khoom siv, txhais cov tub ntxhais stator raws li cov qauv hlau, thiab txhais cov casing li cov khoom siv txhuas, thiab ua cov kev soj ntsuam ntawm lub cev muaj zog tag nrho.Tag nrho hom ntawm lub cev muaj zog tau txais raws li qhia hauv daim duab hauv qab no.
thawj kev txiav txim hom duab
thib ob-order hom duab
thib peb-order hom duab
Motor vibration tsom xamCov lus teb ntawm kev sib haum xeeb ntawm lub cev muaj zog raug tshuaj xyuas, thiab cov txiaj ntsig ntawm kev vibration acceleration ntawm ntau yam ceev tau qhia hauv daim duab hauv qab no.
1000Hz radial acceleration
1500Hz radial acceleration
2000Hz radial accelerationPost lub sij hawm: Jun-13-2022