Yuav ntsuas qhov kev sib hloov ceev ntawm Brushless Tsav li cas?

Sib txawv ntawm lub cev muaj zog, brushless lub cev muaj zog yog tsim los ntawm rotor thiab stator. Lub stator yog tsim los ntawm cov hlau nplaum ruaj khov thiab cov windings uas tswj kev txav ntawm lub rotor los ntawm kev siv cov khoom siv tam sim no. Lub rotor yog tsim los ntawm cov hlau nplaum ruaj khov thiab cov khoom sib nqus, uas tuaj yeem tig raws li qhov kev txiav txim ntawm cov hlau nplaum ruaj khov. Vim yog cov qauv yooj yim thiab kev ua haujlwm ruaj khov, nws tuaj yeem txo cov load thiab kev sib txhuam tsis zoo kom ua tiav cov khoom siv hluav taws xob ntau dua thiab kev ua haujlwm zoo zog.

Raws li rau txoj kev ntsuas kev sib hloov ceev, ua ntej ntawm tag nrho cov, peb yuav tsum nkag siab txog txoj hauv kev ua haujlwm. Sab hauv yog tsim los ntawm stator thiab rotor, lub cev muaj zog los ntawm lub hauv paus ntsiab lus ntawm electromagnetic induction, lub zog hluav taws xob rau hauv lub zog txhua yam kom ua tiav kev sib hloov. Nws qhov kev sib hloov ceev yog cuam tshuam nrog tus tsav tsheb tso zis voltage (tam sim no) thiab load yam. Thaum lub sijhawm ntsuas qhov tseeb, lub cev muaj zog tuaj yeem saib xyuas los ntawm kev nyeem lub rotor tig lub kaum sab xis los ntawm kev siv Hall sensor lossis photoelectric encoder. Ntawm lawv, photoelectric encoder yog siv dav hauv kev ntsuas txoj haujlwm thiab kev ceev ntawm cov khoom siv sensor, muaj qhov zoo ntawm kev daws teeb meem siab, qhov tseeb siab, cov lus teb ceev ceev thiab lwm yam, tuaj yeem ntsuas qhov nrawm. Tsis tas li ntawd, muaj qee qhov kev ntsuas kev ntsuas, hauv kev ntsuas qhov nrawm, yuav ua kom raug thiab yooj yim dua, xws li multimeter, oscilloscope, zaus ntsuas thiab lwm yam.

Kev ntsuas qhov ceev yog qhov kev sim yooj yim, nws txoj hauv kev yog siv Hall effect kom paub txog cov teeb liab tso tawm, thiab tom qab ntawd xam qhov nrawm. Cov nyhuv Hall yog tias thaum lub magnetic teb dhau los ntawm ib co khoom, nws yuav tsim ib co uneven nqi tis, yog li tsim ib tug hluav taws xob teb. Thaum muaj qhov ntws los ntawm cov khoom siv, lub teb hluav taws xob yuav raug pom los ua kom muaj qhov hluav taws xob, hu ua Hall voltage. Vim tias lub rotor yog cov hlau nplaum tas mus li, thaum lub cev muaj zog khiav, qhov sib nqus ntawm lub rotor hnov ​​​​lub Hall sensor, uas ua rau Hall voltage. Lub cev muaj zog ceev tuaj yeem suav tau los ntawm kev kuaj lub waveform ntawm Hall voltage. Muaj ntau txoj hauv kev ntawm kev ntsuas ceev, suav nrog kev sib nqus hlau ncej xov tooj txoj kev, taug qab txoj kev pulse thiab cov txheej txheem theem. Cov txheej txheem sib txawv yog tsim rau cov kev siv sib txawv, tab sis lawv cov hauv paus ntsiab lus yog siv Hall effect los txhawb lub cev muaj zog kom tso tawm cov teeb liab thiab suav cov kev sib hloov ceev. Los ntawm kev ntsuas qhov kev sib hloov ceev, kev ua haujlwm ntawm lub cev muaj zog tuaj yeem ua kom ntseeg tau, thiab kev ua haujlwm thiab kev noj qab haus huv ntawm lub cev muaj zog tuaj yeem saib xyuas. Qhov no yog ib qho tseem ceeb heev rau ob qho tib si cov khoom siv hluav taws xob thiab cov chaw tsim khoom siv tshuab, vim tias nws tuaj yeem pab lawv kom ntseeg tau qhov zoo thiab kev ntseeg siab ntawm lawv cov khoom.

Nws feem ntau yog peb-theem powered, yog li nws qhov ceev feem ntau yog sawv cev los ntawm kev sib hloov ntawm ncej ib feeb (RPM). Kev tshawb pom ntawm kev sib hloov ceev feem ntau suav nrog peb txoj hauv qab no:

1. Lub Hall sensor nrhiav tau

Thaum twg muaj qhov sib txawv ntawm peb lub windings, Hall sensor outputs voltage pulse teeb liab uas nws zaus yog qhov kev sib hloov ceev. Yog li ntawd, qhov kev sib hloov ceev tuaj yeem raug txiav txim siab los ntawm kev ntsuas lub teeb liab zaus ntawm cov zis ntawm Hall sensor.

2. Inverse-EMF nrhiav pom

Antielectromotive quab yuam yog hais txog lub peev xwm hluav taws xob tsim los ntawm kev thauj khoom los ntawm electromagnetic induction nyhuv nyob rau hauv cov kev taw qhia ntawm lub cev muaj zog mus rau lub load, uas yog proportional rau lub cev muaj zog ceev. Lub hauv paus ntsiab lus ntawm inF nrhiav pom yog siv qhov no los xam qhov ceev ntawm lub cev muaj zog. Txoj kev siv tshwj xeeb yog ntxiv qhov ntsuas kev tiv thaiv ntawm ob lub windings ntawm lub cev muaj zog, thiab tom qab ntawd kuaj xyuas qhov inF voltage hauv txhua lub voj voog kev sib hloov, thiab siv cov cuab yeej ntsuas los ntsuas qhov ceev.

3. Photoelectric nrhiav pom

Txoj kev tshawb pom photoelectric tuaj yeem siv los ntsuas qhov tsis xws li txoj haujlwm, tshaj tawm thiab nrawm ntawm cov khoom tig. Txoj kev siv tshwj xeeb yog tsim cov khoom siv hluav taws xob tshawb pom nrog LED thiab cov roj teeb photosensitive, thiab muab tso rau ib ncig ntawm cov khoom tig thiab ua kom nws nyob ze rau qhov chaw tig. Thaum cov khoom tig hla dhau los ntawm cov khoom siv hluav taws xob tshawb pom, LED yuav tawm lub teeb ntawm lub xov tooj ntawm tes, ua kom muaj hluav taws xob tam sim no thiab tso tawm cov teeb liab hluav taws xob. Los ntawm kev ntsuas qhov zaus thiab qhov amplitude ntawm cov zis voltage teeb liab.

Txoj hauj lwm ntawm cov cuab yeej kuaj xyuas yog qhov tseem ceeb heev. Txawm hais tias siv txoj kev twg los xij, cov cuab yeej tshawb nrhiav yuav tsum tau muab tso rau ntawm lub voj voog tig kom raug ntsuas qhov kev sib hloov ceev. Qhov tsim nyog nrhiav tau qhov tseeb yuav tsum tau xaiv. Cov kev ntsuas sib txawv muaj qhov tseeb sib txawv, yog li nws yuav tsum xaiv txoj kev ntsuas tsim nyog los xyuas kom meej qhov ntsuas qhov tseeb. Kev ruaj ntseg ntawm qhov kev xeem tau kuj tseem ceeb heev. Xav txog kev cuam tshuam ntawm ntau yam ntawm kev sib hloov ceev, nws raug nquahu kom ua ntau yam kev sim thiab qhov nruab nrab kom tau txais cov txiaj ntsig raug. Raws li kev sib txawv ntawm lub cev muaj zog thiab daim ntawv thov scenarios, koj yuav tsum xaiv cov kev sib txawv ntawm kev sib hloov ceev thiab ntsuas cov cuab yeej. Ua tib zoo saib xyuas cov teeb meem kev nyab xeeb. Thaum lub sij hawm ntsuas ceev, yuav tsum tau them nyiaj mloog kom tsis txhob muaj kev pheej hmoo ntawm hluav taws xob poob siab. Yog tias koj xav tau kov lub rotating ncej, thov hnav cov hnab looj tes insulating kom tsis txhob muaj xwm txheej ntawm tib neeg.

Cov saum toj no yog peb VSD lub cev muaj zog los qhia rau koj txog kev ntsuas kev ntsuas lub cev tsis muaj zog. Yog xav paub ntxiv, thov hu rau peb cov neeg ua haujlwm pabcuam kev pabcuam los teb. Ua tsaug rau koj nias thiab saib.