Yuav ua li cas yog lub kev sib nrig sib inductance?

Kev sib nrig sib induction phenomenon underlies ib tug plurality ntawm hluav taws xob pab kiag li lawm. Feem ntau teeb meem no, thaum ib tug neeg yog ncaj qha mus confronted nrog nws ces nyob rau hauv lub neej txhua hnub, tab sis twb tsis paub txog nws. Cia peb rov qab tsis ntev los no yav dhau los, qhov chaw uas lub ntsiab lus qhia kis tau tus mob txhais tau tias yog analog Pib ntsais koj teeb. Thiab tam sim no yuav luag tag nrho cov hluav taws xob cov khoom tau pauv mus rau cov tes taws los piav hom. Lub fact tias cov "daim duab" yog zoo dua lub npe hu mus rau tag nrho. Tab sis koj xav tias, yog dab tsi raws nraim? Muaj tseeb, ib co tsev tseem muaj ib tug wired xov tooj serviced los ntawm ib tug analog PBX. Yog hais tias koj sib piv cov niaj hnub "mobile xov tooj" thiab "oldies", cov kev sib piv no kom meej meej tsis nyob rau hauv dej siab ntawm tus tom kawg. Hnov nyob rau tom qab ntawm qhov kev sib tham tu ncua broadcasting los yog txawm lub "zoo tshaj plaws" lo lus no yog tseem ib tug neeg txoj kev sib txuas - qhov no yog tsis muaj surprise. Qhov no tshwm sim vim hais tias nyob rau hauv ib tug xov tooj cable, cov nyob ntawm tej nyob ze rau txhua lwm yam, thiaj li muaj ib tug kev sib nrig sib induction nyob rau hauv ob kab. Lwm cov piv txwv yog cov neeg pulsating clicks tshwm nyob rau hauv lub TV tus hais lus los yog koj lub computer hais lus, thaum muaj mobilka thiab nws yog ib tug hu. Thaum kawg, cov laus IDE-cables nrog 80 conductors tsuas yog siv ib nrab ntawm lawv, thaum lub lwm yam 40 tiv thaiv kom txhob lub txim uas coj kev sib nrig sib induction. Muaj ntau cov piv txwv, tag nrho cov tshwm sim tsis ua kev zoo siab. Nws yog tsuas ib qho tseem ceeb rau koj nco ntsoov tias nyob rau hauv cov ntaub ntawv no, tej "crosstalk" - qhov no yog qhov kev sib nrig sib inductance.

Feem ntau, qhov no lub sij hawm yog hais txog tus txheej txheem ntawm tshwm sim ntawm ib tug electromotive quab yuam (EMF) nyob rau hauv ib tug ntawm cov uas nyob ib sab conductors ntawm lub sij hawm thaum hloov nyob rau hauv lwm yam uas twb muaj lawm tam sim no tus nqi. Feem ntau cov cia li piav hais los ntawm kev sib nrig sib induction nrog ib tug transformer. Nyob rau hauv nws nyuaj daim ntawv (ib tug tshwj xeeb cov ntaub ntawv), lub transformer muaj ob coils txhab nyob rau hauv tib magnetic tub ntxhais. Thaum tam sim no ntws los ntawm cov hlau ntawm ib tug ntawm lawv, muaj nyob ib ncig ntawm ib tug sib nqus teb. Thiaj li nyob sib nqus flux penetrates rau hauv lub thib ob kauj neeg xyuas pib, tsim emf therein. Los tshwm rau ntxias tam sim no, txaus kaw cov uas nrhiav tau ntawm lub kauj, tsim ib cov saw. Nrog ua kev siv ntawm cov magnetic flux yog ntau zog thiab cov kev sib nrig sib inductance. Mus cuag tej yam ntxwv (e.g., efficiency) yog siv ntau cov ntsiab: hloov cov configuration ntawm cov magnetic Circuit Court; tshwj xeeb txoj kev yog ua lub winding coils thiab Ave. kev sib nrig sib inductance yog ntsuas nrog ib tug variometer.

Yuav ua li cas yog nws manifested nyob rau cov qauv hais ua ntej lawm nyob rau hauv no tsab xov xwm? Heev yooj yim: nyob rau hauv yuav luag txhua tus neeg mob (tsuas yog rau mobile xov tooj) yog nyob ze ob peb conductors, yam tsawg kawg yog ib tus uas kis tau ib tug hluav taws xob tam sim no. Thiaj li, muaj ib tug sib nqus teb generating magnetic flux. Cov yav tas, tob tob nyob ze conductors induces EMF nyob rau hauv lawv, raws li tau zoo raws li ib tug saw yog, ces, nyob rau hauv raws li txoj cai ntawm electromagnetic induction, ib tug tam sim no tsev. Nws txoj kev coj yog txiav txim los ntawm ua ntawv thov cov kev cai ntawm txoj Lenz.

Kev sib nrig sib lug siv nyob rau hauv niaj hnub hluav taws xob engineering. Txij li thaum ib co ntawm nws undesirable los tau teev tseg ua ntej lawm nyob rau hauv no tsab xov xwm, nws yuav ua rau kev txiav txim zoo muab cov piv txwv ntawm pab tau. Ib qho ntawm feem zoo-paub pab kiag li lawm - tsev neeg stabilizer mains. Hauv muaj yog ib tug transformer (feem ntau yog ib tug toroid hom) nrog ib tug plurality ntawm terminals, txhua tus uas hnov rau ib yam voltage nqi. Tsis tas li ntawd, nyob rau hauv ib co pab kiag li lawm koj yuav nrhiav tau ib qho kev nthuav tshuaj - galvanic rho tawm. Nyob rau hauv qhov tseeb, qhov no yog tib transformer (tej zaum photocoupler khub), tab sis tsis siv cov transformation coefficient. Raws li ib tug tshwm sim, yuav ua tau kom ua magnetic flux los ntawm ntau yam kev sib txuas lus paths, muab cov theem ntawm hluav taws xob kev nyab xeeb. Qhuav Piv txwv li, nws davit.