Hall sensor

Lub Hall nyhuv yog lub hauv paus rau kev siv ntawm ntau technologies uas tsis yog-hu rau kev sau npe theem ntawm approximation, zog thiab ceev ntawm kev sib hloov ntawm ferromagnetic khoom.

Yuav ua li cas yog lub Hall sensor, nws yog ua tau rau to taub, nkag siab nyob rau hauv cov nyhuv dab tshwm sim nyob rau hauv nws. Thaum lub sij hawm ntawm tso cai ntawm lub tam sim no los ntawm lub phaj cev nyob rau hauv lub longitudinal kev taw qhia thaum ib tug sib nqus teb tshwm sim nyob rau thaum xaus feem ntawm lub phaj nyob rau hauv ib lub tsheb transverse rau qhov tam sim no lub zog, ib tug tej zaum txawv yog tsim. Nws yog tshwm sim los ntawm lub Lorentz txoj cai, uas tsim lub fact tias vim qhov tus ntawm lub magnetic teb tokonositeli yuav ceev rau ntawm cov npoo ntawm lub phaj. Cov uas ua tej zaum txawv yog ncaj qha xwm yeem mus rau qhov ntau ntawm cov vector khoom ntawm lub teb lub dag lub zog thiab tam sim no H • I.

Nyob rau hauv lub qhaj ntawv ntawm magnetic teb ntawm lub electron flux tsis tshwm sim distortion. Thaum ib tug sib nqus teb Lorentz rog muab kev koom tes nyob rau hauv lub rejection ntawm lub electrons thiab ua kom dabtsi yog khoov ntawm lawv trajectories. Cov paths yog qhov ua rau ntawm tsub zuj zuj ntawm tsis zoo nqi rau ntawm ib sab ntawm lub phaj. Tus txheem sab ntawm lub phaj ua hauj lwm pab raws li ib qhov chaw ntawm tsub zuj zuj ntawm ib tug uncompensated zoo xwb. Lub concentration ntawm cov nqi rau ntawm qhov chaw ntawm lub opposite ntsej muag ntawm lub phaj yog qhov ua rau ntawm lub electric teb nyob rau hauv lub transverse kev taw qhia, uas hu ua lub Hall teb. Tus txheej txheem ntxiv kom txog rau thaum tus nqi cia kom txog thaum uas tshwm transverse EMF tsis them rau cov rog uas yog generated los ntawm cov magnetic teb. Ces mounted nyob ruaj ruaj txheej txheem hom, nyob rau hauv uas electrons tsiv mus nyob rau thaum uas tig mus kev taw qhia nrog cov npoo ntawm cov phaj, raws li nyob rau hauv lub qhaj ntawv ntawm magnetic teb.

Hall sensor, ua ntaub ntawv

Lub semiconductor khoom siv ntawm ib tug Hall sensor yuav tsum tau manufactured, cov cab kuj yuav tsum tau tsis tsuas siab, tab sis raws li me ntsis li sai tau nyob rau qhov tseem ceeb ntawm kub, lub npe hu ua lub Hall coefficient, thiab mus rau muaj peev xwm. Rau xaiv ntawm semiconductor khoom (phiaj - mus ua lub Hall sensor) los coj nws cheeb tsam ntawm kev siv.

Lub Hall coefficient yog txhais los ntawm qhov yuav tsum tau rau kev ntsuas ntawm magnetic teb induction, tam sim no los ntawm cov qauv nrog lub teeb nws cov thickness. Nrog kev txawj ntse ntawm tus nqi ntawm cov Hall coefficient, nws tseem tau mus tsim kom muaj lub concentration xwb muaj nyob rau hauv lub cev ntawm lub phaj, uas yog inversely xwm yeem mus rau khoom ntawm lub Hall coefficient ntawm lub electron xwb.

Semiconductors feem ntau yog thov nrog lub xub ntiag ntawm hluav taws xob conduction vim lub fact tias lawv muaj ntau dua cov cab kuj muaj tshaj li cov neeg semiconductors uas muaj p-hom conductivity. Nco ntsoov yuav tsum paub tias lub cev thaj chaw ntawm semiconductor ntaub ntawv yuav tsum raug rau cov teeb meem loj cov kev hloov, nyob ntawm seb zoo li cas thiab yuav ua li cas muaj ntau yam impurities yuav tsum tau qhia nyob rau hauv lawv.

Hall sensor technology rau kev tsim

Yuav kom manufacture ib tug semiconductor wafer rau siv nyob rau hauv lub Hall sensor yuav ua tau raws li nram no:

1. Hall haus siv lead ua phaj lub Desired zoo ntawm cov tib siv lead ua bar.

2. Tau lub Hall phaj mus rau lub substrate los ntawm txau lub thinnest khaubncaws sab nraud povtseg ntawm semiconductor cov ntaub ntawv.

Scope Hall sensors

Siv linear Hall sensors lug faib nyob rau hauv daim ntawv:

- tam sim no sensors;

- actuators nrog nce mus nce los ceev;

- tswj circuits thiab lub cev muaj zog tiv thaiv;

- txoj hauj lwm sensors;

- txaus sensors;

- motors brushless DC ;

- contactless potentiometers;

- kev sib hloov lub sensor;

- detectors ferromagnetic lub cev;

- co sensors;

- tachometer.

Cov ntaub ntawv muab teev tseg nyob rau hauv tsab xov xwm yuav pab kom tus nyeem ntawv nyob rau hauv cov kev tshwm sim ntawm ib tug kev sib tham nyob rau hauv dab tsi yog ib tug Hall sensor.