Rov qab EMF ntawm Permanent Magnet Synchronous Tsav

Rov qab EMF ntawm Permanent Magnet Synchronous Tsav

1. Yuav ua li cas rov qab EMF tsim?

Cov tiam ntawm rov qab electromotive quab yuam yog yooj yim to taub. Lub hauv paus ntsiab lus yog tias tus neeg xyuas pib txiav cov kab sib nqus ntawm lub zog. Tsuav yog muaj kev sib txheeb ntawm ob qho tib si, qhov chaw sib nqus tuaj yeem nyob ruaj khov thiab tus neeg xyuas pib txiav nws, lossis tus neeg xyuas pib tuaj yeem nyob ruaj khov thiab qhov chaw sib nqus txav.

Rau cov hlau nplaum ruaj khov synchronous motors, lawv cov coils yog tsau rau ntawm stator (conductor) thiab cov hlau nplaum ruaj khov yog tsau rau ntawm rotor (magnetic field). Thaum lub rotor tig, lub magnetic teb generated los ntawm cov hlau nplaum tas mus li ntawm lub rotor yuav tig, thiab yuav raug txiav los ntawm cov coils ntawm stator, generating rov qab electromotive quab yuam nyob rau hauv lub coils.Vim li cas nws thiaj li hu ua rov qab electromotive quab yuam? Raws li lub npe qhia, cov kev taw qhia ntawm lub nraub qaum electromotive quab yuam E yog opposite rau cov kev taw qhia ntawm lub davhlau ya nyob twg voltage U (raws li qhia nyob rau hauv daim duab 1).

Daim duab 1

2.Dab tsi yog kev sib raug zoo ntawm rov qab EMF thiab lub davhlau ya nyob twg voltage?

Nws tuaj yeem pom los ntawm daim duab 1 tias kev sib raug zoo ntawm lub zog hluav taws xob rov qab thiab lub davhlau ya nyob twg voltage nyob rau hauv load yog:

Kev ntsuas rov qab electromotive quab yuam feem ntau yog ua raws li qhov tsis muaj kev thauj khoom, tsis muaj tam sim no thiab ntawm qhov ceev ntawm 1000 rpm. Feem ntau, tus nqi ntawm 1000rpm yog txhais raws li rov qab-EMF coefficient = nruab nrab rov qab-EMF tus nqi / ceev. Back-EMF coefficient yog qhov tseem ceeb ntawm lub cev muaj zog. Nws yuav tsum tau muab sau tseg ntawm no hais tias lub back-EMF nyob rau hauv load yog tas li hloov ua ntej lub ceev yog ruaj khov.Los ntawm mis (1), peb yuav paub hais tias lub rov qab electromotive quab yuam nyob rau hauv load yog me dua lub davhlau ya nyob twg voltage. Yog tias lub zog hluav taws xob rov qab loj dua qhov hluav taws xob hluav taws xob, nws dhau los ua lub tshuab hluav taws xob thiab tso tawm qhov hluav taws xob mus rau sab nraud. Txij li thaum qhov tsis kam thiab tam sim no hauv kev ua haujlwm tiag tiag me me, tus nqi ntawm lub zog hluav taws xob rov qab yog kwv yees li qhov sib npaug ntawm qhov hluav taws xob davhlau ya nyob twg thiab raug txwv los ntawm tus nqi ntsuas ntawm lub davhlau ya nyob twg voltage.

3. Lub ntsiab lus ntawm lub cev rov qab electromotive quab yuam

Xav txog dab tsi yuav tshwm sim yog tias tsis muaj EMF rov qab? Los ntawm kev sib npaug (1), peb tuaj yeem pom tias tsis muaj lub nraub qaum EMF, tag nrho lub cev muaj zog sib npaug rau cov khoom siv dawb huv, dhau los ua cov khoom siv hluav taws xob ntau, uas yog qhov tsis sib xws rau lub cev muaj zog hloov hluav taws xob rau hauv lub tshuab hluav taws xob. hluav taws xob hloov hluav taws xob sib npaug, UI yog lub zog hluav taws xob input, xws li lub zog hluav taws xob nkag mus rau lub roj teeb, lub cev muaj zog lossis transformer; I2Rt yog qhov hluav taws xob poob hluav taws xob hauv txhua qhov hluav taws xob, uas yog hom hluav taws xob poob hluav taws xob, qhov me dua qhov zoo; Qhov sib txawv ntawm cov khoom siv hluav taws xob hluav taws xob thiab hluav taws xob poob hluav taws xob, Nws yog lub zog muaj txiaj ntsig zoo sib xws rau lub zog hluav taws xob rov qab. Hauv lwm lo lus, rov qab EMF yog siv los tsim lub zog muaj txiaj ntsig thiab muaj kev cuam tshuam cuam tshuam txog kev poob cua sov. Qhov ntau dua qhov kub poob lub zog, qhov me dua qhov ua tau zoo zog.Objectively hais, rov qab electromotive quab yuam siv hluav taws xob hluav taws xob hauv Circuit Court, tab sis nws tsis yog "poob". Ib feem ntawm lub zog hluav taws xob sib txuas nrog lub zog hluav taws xob rov qab yuav raug hloov mus rau hauv lub zog muaj txiaj ntsig rau cov khoom siv hluav taws xob, xws li lub zog ntawm lub cev muaj zog, tshuaj lom neeg lub zog ntawm cov roj teeb, thiab lwm yam.

Nws tuaj yeem pom los ntawm qhov no tias qhov loj ntawm lub nraub qaum electromotive quab yuam txhais tau hais tias lub peev xwm ntawm cov khoom siv hluav taws xob hloov pauv tag nrho cov khoom siv hluav taws xob rau hauv lub zog muaj txiaj ntsig, uas qhia txog qib ntawm cov khoom siv hluav taws xob hloov pauv muaj peev xwm.

4. Qhov luaj li cas ntawm lub zog rov qab electromotive nyob ntawm seb?

Kev suav cov mis ntawm rov qab electromotive quab yuam yog:

E yog lub coil electromotive quab yuam, ψ yog qhov sib nqus flux, f yog qhov zaus, N yog tus lej hloov, thiab Φ yog qhov sib nqus flux.
Raws li cov qauv saum toj no, kuv ntseeg tias txhua tus tuaj yeem hais ob peb yam uas cuam tshuam rau qhov loj ntawm lub zog hluav taws xob rov qab. Ntawm no yog ib tsab xov xwm los xaus:

(1) Rov qab EMF yog sib npaug rau qhov hloov pauv ntawm cov hlau nplaum sib nqus. Qhov siab dua qhov ceev, qhov ntau dua qhov hloov pauv thiab ntau dua EMF rov qab.

(2) Qhov sib nqus flux nws tus kheej yog sib npaug rau tus naj npawb ntawm lem multiplied los ntawm ib zaug-tig magnetic flux. Yog li ntawd, qhov ntau dua ntawm cov lem, qhov sib nqus flux ntau dua thiab ntau dua EMF rov qab.

(3) Tus naj npawb ntawm cov lem muaj feem xyuam rau lub tswv yim winding, xws li lub hnub qub-delta kev twb kev txuas, tus naj npawb ntawm cov lem ntawm ib lub qhov, tus naj npawb ntawm cov theem, tus naj npawb ntawm cov hniav, tus naj npawb ntawm cov ceg sib npaug, thiab lub suab puv lossis lub suab luv luv.

(4) Tib-tig sib nqus flux yog sib npaug rau lub zog magnetomotive faib los ntawm kev sib nqus tsis kam. Yog li ntawd, qhov loj dua lub zog magnetomotive, qhov me me qhov sib nqus tsis kam nyob rau hauv cov kev taw qhia ntawm magnetic flux thiab ntau dua EMF rov qab.

(5) Sib nqus kuj muaj feem xyuam rau qhov sib txawv ntawm huab cua thiab kev sib koom ua ke ntawm ncej-qhov. Qhov loj dua qhov sib txawv ntawm huab cua, qhov sib nqus ua haujlwm ntau dua thiab qhov me dua EMF. Pole-slot kev sib koom tes yog qhov nyuaj dua thiab yuav tsum muaj kev tshuaj xyuas tshwj xeeb.

(6) Magnetomotive quab yuam muaj feem xyuam rau cov hlau nplaum seem ntawm cov hlau nplaum thiab thaj chaw zoo ntawm cov hlau nplaum. Qhov loj dua qhov seem hlau nplaum, qhov siab dua EMF. Qhov chaw zoo yog cuam tshuam nrog cov kev taw qhia magnetization, qhov loj me thiab qhov chaw ntawm cov hlau nplaum thiab yuav tsum muaj kev tsom xam tshwj xeeb.

(7) Cov hlau nplaum seem muaj feem xyuam rau qhov kub thiab txias. Qhov siab dua qhov kub, qhov me me tom qab EMF.

Nyob rau hauv cov ntsiab lus, cov yam cuam tshuam rov qab EMF muaj xws li kev sib hloov ceev, tus naj npawb ntawm lem ib qhov, tus naj npawb ntawm theem, tus naj npawb ntawm parallel ceg, tag nrho lub suab thiab luv suab, lub cev muaj zog sib nqus Circuit Court, huab cua sib txawv ntev, ncej-qhov sib txuam, sib nqus hlau seem hlau nplaum. , sib nqus steel qhov chaw thiab qhov loj me, sib nqus hlau magnetization kev taw qhia, thiab kub.

5. Yuav ua li cas xaiv qhov loj ntawm lub nraub qaum electromotive quab yuam hauv kev tsim lub cev muaj zog?

Hauv kev tsim lub cev muaj zog, rov qab EMF E yog qhov tseem ceeb heev. Yog tias lub nraub qaum EMF tsim tau zoo (qhov loj me, qhov tsis sib xws ntawm cov waveform distortion), lub cev muaj zog yog qhov zoo. Lub nraub qaum EMF muaj ntau qhov cuam tshuam loj ntawm lub cev muaj zog:

1. Qhov loj ntawm lub nraub qaum EMF txiav txim siab qhov tsis muaj zog hlau nplaum ntawm lub cev muaj zog, thiab qhov tsis muaj zog hlau nplaum txiav txim siab qhov kev faib tawm ntawm daim ntawv qhia kev ua haujlwm ntawm lub cev muaj zog.
2. Tus nqi distortion ntawm lub nraub qaum EMF waveform cuam tshuam rau lub cev muaj zog ripple torque thiab smoothness ntawm cov zis torque thaum lub cev muaj zog khiav.
3. Qhov loj ntawm lub nraub qaum EMF ncaj qha txiav txim siab torque coefficient ntawm lub cev muaj zog, thiab lub nraub qaum EMF coefficient yog proportional rau lub torque coefficient.
Los ntawm qhov no, cov kev tsis sib haum xeeb hauv qab no hauv kev tsim lub cev muaj zog tuaj yeem tau txais:
a. Thaum lub nraub qaum EMF loj, lub cev muaj zog tuaj yeem tswj tau lub zog siab ntawm tus tswj kev txwv tam sim no hauv thaj chaw ua haujlwm qis, tab sis nws tsis tuaj yeem tso tawm lub zog ntawm kev kub ceev, thiab txawm tias tsis tuaj yeem ncav cuag qhov xav tau ceev;
b. Thaum lub nraub qaum EMF me me, lub cev muaj zog tseem muaj peev xwm tso tawm hauv qhov chaw siab ceev, tab sis lub zog torque tsis tuaj yeem ua tiav ntawm tib tus maub los tam sim no ntawm qhov nrawm.

6. Qhov cuam tshuam zoo ntawm rov qab EMF ntawm cov hlau nplaum ruaj khov.

Qhov muaj nyob ntawm EMF rov qab yog qhov tseem ceeb heev rau kev ua haujlwm ntawm cov hlau nplaum ruaj khov. Nws tuaj yeem nqa qee qhov zoo thiab cov haujlwm tshwj xeeb rau cov motors:
a. Kev txuag hluav taws xob
Lub nraub qaum EMF tsim los ntawm cov hlau nplaum ruaj khov tuaj yeem txo qhov tam sim no ntawm lub cev muaj zog, yog li txo lub zog poob, txo qis zog, thiab ua tiav lub hom phiaj ntawm kev txuag hluav taws xob.
b. Nce torque
Lub nraub qaum EMF yog rov qab rau lub zog hluav taws xob. Thaum lub cev muaj zog nce, lub nraub qaum EMF kuj nce. Qhov hluav taws xob rov qab yuav txo qhov inductance ntawm lub cev muaj zog winding, uas ua rau muaj qhov nce ntawm qhov tam sim no. Qhov no tso cai rau lub cev muaj zog los tsim cov torque ntxiv thiab txhim kho lub zog ua haujlwm ntawm lub cev muaj zog.
c. Rov qab deceleration
Tom qab lub tshuab hlau nplaum tas mus li poob lub zog, vim muaj qhov rov qab EMF, nws tuaj yeem tsim cov hlau nplaum txuas ntxiv thiab ua rau lub rotor tig mus ntxiv, uas ua rau cov nyhuv rov qab EMF rov qab nrawm, uas yog qhov tseem ceeb heev hauv qee qhov kev siv, xws li raws li cov cuab yeej siv tshuab thiab lwm yam khoom siv.

Hauv ntej, rov qab EMF yog qhov tseem ceeb ntawm cov hlau nplaum ruaj khov. Nws coj ntau yam txiaj ntsig rau cov hlau nplaum ruaj khov motors thiab ua lub luag haujlwm tseem ceeb hauv kev tsim thiab tsim cov motors. Qhov loj thiab waveform ntawm rov qab EMF nyob ntawm seb yam xws li kev tsim, tsim cov txheej txheem thiab siv cov xwm txheej ntawm cov hlau nplaum mus tas li. Qhov loj thiab waveform ntawm rov qab EMF muaj qhov cuam tshuam tseem ceeb ntawm kev ua haujlwm thiab kev ruaj ntseg ntawm lub cev muaj zog.

Anhui Mingteng Permanent Magnet Electromechanical Equipment Co., Ltd. (https://www.mingtengmotor.com/)yog ib lub chaw tsim khoom ntawm cov hlau nplaum ruaj khov synchronous motors. Peb lub chaw ua haujlwm muaj ntau tshaj 40 R & D cov neeg ua haujlwm, muab faib ua peb chav haujlwm: tsim, txheej txheem, thiab kev sim, tshwj xeeb hauv kev tshawb fawb thiab kev tsim kho, tsim, thiab txheej txheem tshiab ntawm cov hlau nplaum ruaj khov synchronous motors. Siv cov kev tsim software thiab tus kheej tsim cov hlau nplaum ruaj khov lub cev muaj zog tshwj xeeb tsim cov kev pab cuam, thaum lub sij hawm tsim thiab tsim cov txheej txheem, qhov loj thiab yoj ntawm lub nraub qaum electromotive quab yuam yuav ua tib zoo txiav txim siab raws li qhov xav tau tiag tiag thiab kev ua haujlwm tshwj xeeb ntawm tus neeg siv los xyuas kom meej. kev ua tau zoo thiab kev ruaj ntseg ntawm lub cev muaj zog thiab txhim kho lub zog ua haujlwm ntawm lub cev muaj zog.

Copyright: Kab lus no yog rov luam tawm ntawm WeChat pej xeem naj npawb "电机技术及应用", qhov txuas thawj https://mp.weixin.qq.com/s/e-NaJAcS1rZGhSGNPv2ifw

Kab lus no tsis sawv cev rau peb lub tuam txhab txoj kev xav. Yog tias koj muaj kev xav lossis kev xav, thov kho peb!