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Txoj hauj lwm tawm tswv yim rau brushless DC lub cev muaj zog

Txij thaum yug los brushless DC lub cev muaj zog, Hall effect sensor tau lub ntsiab quab yuam ntawm realizing commutation tawm tswv yim.Vim peb-theem tswj yuav tsum tau tsuas yog peb lub sensors thiab muaj ib tug nqi tsev nqi, lawv feem ntau yog lub feem ntau yig xaiv rau reversing los ntawm ib tug purely BOM foundations.Hall effect sensors embedded nyob rau hauv lub stator ntes txoj hauj lwm ntawm lub rotor kom transistors nyob rau hauv peb-theem choj yuav hloov mus rau tsav lub motor.Qhov peb Hall effect sensor outputs feem ntau sau npe raws li U, V, thiab W channels.Txawm hais tias Hall Cov nyhuv sensors tuaj yeem daws qhov teeb meem ntawm BLDC lub cev muaj zog sib hloov, lawv tsuas yog ua tau raws li ib nrab ntawm cov kev cai ntawm BLDC system.

Txawm hais tias Hall effect sensor enables tus maub los los tsav lub BLDC lub cev muaj zog, nws txoj kev tswj tsis tu ncua rau kev ceev thiab kev taw qhia.Nyob rau hauv peb-theem lub cev muaj zog, Hall effect sensor tsuas tuaj yeem muab txoj haujlwm angular nyob rau hauv txhua lub voj voog hluav taws xob.Raws li tus naj npawb ntawm cov ncej txuas ntxiv, yog li tus naj npawb ntawm cov hluav taws xob mus rau ib qho kev sib hloov, thiab raws li kev siv BLDCs tau dav dua. , yog li qhov xav tau rau qhov kev paub meej ntawm txoj hauj lwm.Yuav kom paub meej tias qhov kev daws teeb meem zoo thiab ua tiav, BLDC system yuav tsum muab cov ntaub ntawv qhia txog txoj haujlwm ntawm lub sijhawm tiag tiag kom tus maub los tuaj yeem taug qab tsis yog kev ceev thiab kev taw qhia xwb, tab sis kuj mus deb thiab txoj hauj lwm angular.
Txhawm rau ua kom tau raws li qhov xav tau ntawm cov ntaub ntawv xov xwm nruj dua, ib qho kev daws teeb meem yog ntxiv qhov incremental teb encoder rau BLDC lub cev muaj zog. Feem ntau, incremental encoders tau ntxiv rau tib lub tswv yim tswj lub voj kaw lus ntxiv rau Hall effect sensor.Hall effect sensors yog siv rau lub cev muaj zog reversing, thaum encoders yog siv rau ntau yam kev taug qab ntawm txoj hauj lwm, kev sib hloov, ceev thiab kev taw qhia.Vim lub Hall effect sensor tsuas yog muab cov ntaub ntawv tshiab txoj hauj lwm ntawm txhua lub xeev Hall hloov, nws qhov tseeb tsuas yog mus txog rau lub xeev rau txhua lub zog. bipolar motors, muaj tsuas yog rau lub xeev ib lub voj voog txhua yam.Qhov kev xav tau ntawm ob qho tib si yog pom tseeb thaum piv rau ib qho incremental encoder uas muaj kev daws teeb meem hauv ntau txhiab PPR (pulses ib kiv puag ncig), uas tuaj yeem txiav txim siab ua plaub zaug ntawm lub xeev hloov pauv.
Txawm li cas los xij, txij li cov tuam txhab tsim hluav taws xob tam sim no yuav tsum tau sib sau ua ke ntawm Hall effect sensors thiab incremental encoders rau hauv lawv cov motors, ntau encoder manufacturers pib muab incremental encoders nrog commutating outputs, uas peb feem ntau xa mus rau yooj yim raws li commutating encoders.Cov encoders tau tshwj xeeb tsim los rau. muab tsis tau tsuas yog cov tsoos orthogonal A thiab B raws (thiab qee zaum "ib zaug ib zaug" Performance index pulse channel Z), tab sis kuj yog tus qauv U, V, thiab W commutation signals xav tau los ntawm feem ntau BLDC tsav tsheb.Qhov no txuag lub cev muaj zog tus tsim cov kauj ruam tsis tsim nyog ntawm kev txhim kho Hall effect sensor thiab incremental encoder tib lub sijhawm.
Txawm hais tias qhov zoo ntawm txoj hauv kev no yog qhov pom tseeb, muaj kev lag luam tseem ceeb.Raws li tau hais los saum no, txoj haujlwm ntawm rotor thiab stator yuav tsum tau ua kom zoo rau cov BLDC brushless lub cev muaj zog kom ua tau zoo commutated.Qhov no txhais tau hais tias yuav tsum tau saib xyuas kom ntseeg tau tias U / V / W channels ntawm lub commutator encoder yog raug raws li theem ntawm BLDC lub cev muaj zog.