xov xwm

Lub hauv paus ntsiab lus ua haujlwm ntawm inductance yog qhov tsis txaus ntseeg. Txhawm rau piav qhia qhov inductance yog dab tsi, peb pib los ntawm qhov tshwm sim ntawm lub cev.

1. Ob qhov tshwm sim thiab ib txoj cai: hluav taws xob-induced magnetism, magnetism-induced hluav taws xob, thiab Lenz txoj cai

1.1 Electromagnetic phenomenon

Muaj ib qho kev sim nyob rau hauv tsev kawm ntawv theem siab physics: thaum ib tug me me hlau nplaum yog muab tso rau ib sab ntawm ib tug neeg xyuas pib nrog tam sim no, cov kev taw qhia ntawm lub me me hlau nplaum deflects, uas qhia tau hais tias muaj ib tug magnetic teb nyob ib ncig ntawm lub tam sim no. Qhov tshwm sim no tau pom los ntawm Danish physicist Oersted hauv xyoo 1820.

Yog tias peb cua tus neeg xyuas pib mus rau hauv lub voj voog, cov hlau nplaum uas tsim los ntawm txhua lub voj voog ntawm tus neeg xyuas pib tuaj yeem sib tshooj, thiab tag nrho cov hlau nplaum yuav muaj zog dua, uas tuaj yeem nyiam cov khoom me me. Nyob rau hauv daim duab, lub kauj yog energized nrog ib tug tam sim no ntawm 2 ~ 3A. Nco ntsoov tias enameled hlau muaj qhov ntsuas tam sim no txwv, txwv tsis pub nws yuav yaj vim qhov kub thiab txias.

2. Magnetoelectricity tshwm sim

Xyoo 1831, tus kws tshawb fawb Askiv Faraday tau tshawb pom tias thaum ib feem ntawm tus neeg xyuas pib ntawm lub voj voog kaw txav mus txiav cov hlau nplaum, hluav taws xob yuav raug tsim tawm ntawm tus neeg xyuas pib. Qhov yuav tsum tau ua ua ntej yog qhov Circuit Court thiab magnetic teb nyob rau hauv ib qho kev hloov pauv, yog li nws yog hu ua "dynamic" magnetoelectricity, thiab cov generated tam sim no hu ua induced tam sim no.

Peb tuaj yeem ua qhov kev sim nrog lub cev muaj zog. Nyob rau hauv ib qho DC brushed lub cev muaj zog, lub stator ib feem yog cov hlau nplaum tas mus li thiab rotor ib feem yog coil conductor. Manually tig lub rotor txhais tau hais tias tus neeg xyuas pib tsiv mus txiav cov kab sib nqus ntawm lub zog. Siv lub oscilloscope los txuas ob lub tshuab hluav taws xob ntawm lub cev muaj zog, qhov hloov hluav taws xob tuaj yeem ntsuas tau. Lub tshuab hluav taws xob yog tsim los ntawm lub hauv paus ntsiab lus no.

3. Lenz Txoj Cai

Lenz Txoj Cai: Cov kev taw qhia ntawm qhov induced tam sim no generated los ntawm kev hloov ntawm magnetic flux yog cov kev taw qhia uas tawm tsam qhov kev hloov ntawm magnetic flux.

Ib qho yooj yim to taub ntawm kab lus no yog: thaum lub magnetic teb (sab nraud magnetic teb) ntawm tus neeg xyuas pib qhov chaw ib puag ncig muaj zog, lub magnetic teb generated los ntawm nws induced tam sim no yog opposite rau sab nraud magnetic teb, ua rau tag nrho cov magnetic teb tsis muaj zog tshaj sab nraud. magnetic teb. Thaum lub magnetic teb (sab nraud magnetic teb) ntawm tus neeg xyuas pib qhov chaw ib puag ncig yuav tsis muaj zog, lub magnetic teb generated los ntawm nws induced tam sim no yog opposite rau sab nraud magnetic teb, ua rau tag nrho cov magnetic teb muaj zog tshaj sab nraud magnetic teb.

Lenz Txoj Cai tuaj yeem siv los txiav txim siab qhov kev taw qhia ntawm qhov induced tam sim no hauv Circuit Court.

2. Kauv raj coil – piav qhia yuav ua li cas inductors ua haujlwm Nrog kev paub ntawm ob qhov xwm txheej saum toj no thiab ib txoj cai, cia saib seb inductors ua haujlwm li cas.

Qhov yooj yim tshaj plaws inductor yog kauv raj coil:

Qhov xwm txheej thaum lub hwj chim qhib

Peb txiav ib feem me me ntawm cov kav raj thiab tuaj yeem pom ob lub coils, coil A thiab coil B:

Thaum lub hwj chim-on txheej txheem, qhov xwm txheej yog raws li nram no:

①Coil A dhau los ntawm qhov tam sim no, xav tias nws cov kev taw qhia yog raws li qhia los ntawm cov khoom xiav xiav, uas yog hu ua cov excitation tam sim no;
② Raws li lub hauv paus ntsiab lus ntawm electromagnetism, sab nraud excitation tam sim no generates ib magnetic teb, uas pib kis nyob rau hauv ib puag ncig qhov chaw thiab npog coil B, uas yog sib npaug rau coil B txiav cov hlau nplaum ntawm lub zog, raws li qhia los ntawm cov xiav dotted kab;
③ Raws li lub hauv paus ntsiab lus ntawm magnetoelectricity, ib qho induced tam sim no yog tsim nyob rau hauv kauj B, thiab nws cov kev taw qhia yog raws li qhia los ntawm cov khoom ntsuab, uas yog opposite rau sab nraud excitation tam sim no;
④ Raws li Lenz txoj cai, lub magnetic teb generated los ntawm induced tam sim no yog los counteract lub magnetic teb ntawm sab nraud excitation tam sim no, raws li qhia los ntawm cov ntsuab dotted kab;

Qhov xwm txheej tom qab fais fab tuag ruaj khov (DC)

Tom qab lub hwj chim-on yog ruaj khov, sab nraud excitation tam sim no ntawm coil A yog tas li, thiab cov magnetic teb nws generates kuj tas li. Lub magnetic teb tsis muaj kev sib txheeb nrog cov kauj B, yog li tsis muaj magnetoelectricity, thiab tsis muaj tam sim no sawv cev los ntawm cov khoom ntsuab. Nyob rau lub sijhawm no, tus inductor sib npaug rau luv luv Circuit Court rau sab nraud excitation.

3. Cov yam ntxwv ntawm inductance: tam sim no tsis tuaj yeem hloov tam sim ntawd

Tom qab nkag siab li cas ibinductorua haujlwm, cia saib nws cov yam ntxwv tseem ceeb tshaj plaws - tam sim no hauv inductor tsis tuaj yeem hloov tam sim ntawd.

Nyob rau hauv daim duab, kab rov tav axis ntawm txoj cai nkhaus yog lub sij hawm, thiab ntsug axis yog tam sim no nyob rau hauv inductor. Lub sijhawm qhov hloov pauv raug kaw yog coj los ua lub hauv paus ntawm lub sijhawm.

Nws tuaj yeem pom tias: 1. Thaum lub sijhawm hloov pauv, qhov tam sim no ntawm qhov inductor yog 0A, uas yog sib npaug rau qhov inductor qhib-circuited. Qhov no yog vim hais tias tam sim no tam sim no hloov sharply, uas yuav tsim ib tug loj induced tam sim no (ntsuab) los tiv thaiv sab nraud excitation tam sim no (xiav);

2. Nyob rau hauv tus txheej txheem ntawm mus txog ib tug khov kho, tam sim no nyob rau hauv inductor hloov exponentially;

3. Tom qab mus txog qhov chaw nyob ruaj khov, qhov tam sim no ntawm lub inductor yog I = E / R, uas yog sib npaug rau inductor yog luv luv;

4. Ua raws li qhov cuam tshuam tam sim no yog qhov induced electromotive quab yuam, uas ua rau counteract E, yog li nws yog hu ua Back EMF (reverse electromotive force);

4. Dab tsi yog inductance?

Inductance yog siv los piav txog lub peev xwm ntawm lub cuab yeej los tiv thaiv kev hloov pauv tam sim no. Lub zog muaj peev xwm tiv thaiv cov kev hloov pauv tam sim no, qhov ntau dua qhov inductance, thiab vice versa.

Rau DC excitation, lub inductor yog kawg nyob rau hauv lub luv luv-circuit xeev (voltage yog 0). Txawm li cas los xij, thaum lub sijhawm siv hluav taws xob, qhov hluav taws xob thiab qhov tam sim no tsis yog 0, uas txhais tau hais tias muaj hwj chim. Tus txheej txheem ntawm accumulating lub zog no hu ua them. Nws khaws lub zog no nyob rau hauv daim ntawv ntawm magnetic teb thiab tso tawm lub zog thaum xav tau (xws li thaum excitation sab nraud tsis tuaj yeem tuav qhov loj me tam sim no nyob rau hauv lub xeev khov kho).

Inductors yog cov khoom siv inertial hauv electromagnetic teb. Cov cuab yeej inertial tsis nyiam cov kev hloov pauv, ib yam li cov flywheels nyob rau hauv dynamics. Lawv nyuaj rau pib spinning thaum xub thawj, thiab thaum lawv pib spinning, lawv nyuaj rau nres. Tag nrho cov txheej txheem yog nrog los ntawm lub zog hloov dua siab tshiab.

Yog tias koj txaus siab, thov mus saib lub vev xaibwww.tclmdcoils.com.