Varistor - yog dab tsi? Varistors: kev khiav hauj lwm hauv paus ntsiab lus, hom thiab daim ntawv thov

Varistor - dab tsi nws yog, qhov twg nws yog siv, thiab dab tsi yog yuav tsum tau? Qhov no lub caij ntawm hluav taws xob circuits tsis tshua muaj siv, li ntawd, nws lub npe yog tsis nyob rau hauv pob ntseg. Wb kho no thiab tau ntsib nrog nws ua hauj lwm thiab hais tias ntawm lub ntaus ntawv.

lus qhia dav dav

Nws muaj hluav taws xob rwb thaiv tsev, uas sib raug rau lub nominal voltage. Lub sij daim duab tej zaum yuav txawv los ntawm lub theoretical nqi. Tab sis lub chaw ua hauj lwm yuav tsum muaj nyob rau hauv cov ntaub ntawv qhov hloov tus nqi yog me me thiab yog nyob rau hauv lub tso cai ntau yam. Tsis tau electrics feem ntau tsis vim hais tias ntawm lub voltage mem tes. Yog li ntawd hu ua ceev hloov nyob rau hauv cov yam ntxwv ntawm ib tug taw tes, thaum los rau nws cov thawj theem nyob rau hauv ib luv luv lub sij hawm ntawm lub sij hawm. Lub pulses yuav ua tau xob laim thiab switching. Yuav kom tiv thaiv xws hloov mus hloov los, siv ib tug ntau yam ntawm pab kiag li lawm, xws li valve-hom arresters, ntxaij lim dej, chains thiab ntau lwm yam uas. Tab sis nws muab tawm yuav tsum tau qhov zoo tshaj plaws varistor. Yuav ua li cas yog nws? Yog li ntawd hu ua zoo thiab luv-nqi txhais tau tias kev tiv thaiv tiv thaiv pulses uas yog raws li nyob rau hauv ib tug nonlinear semiconductor resistors. Lub hauv paus ntsiab lus ntawm cov lag luam yog yooj yim: ib tug varistor yog kev cob cog rua nyob rau hauv uas tig mus rau tus tiv thaiv cov khoom nyob rau hauv lub qub hom, nws yog cuam tshuam los ntawm lub operating voltage ntawm tus tiv thaiv ntaus ntawv. Thaum muaj xwm ceev tshwm sim, nws yuav pib mus ua raws li ib tug insulator. Lawv pom qhov txawv feature yog symmetrical thiab zoo-txhais non-linear tam sim no-voltage yam ntxwv.

kev nqis tes ua varistor

Thaum tus mem tes tshwm sim, lub apparatus vim hais tias ntawm lub nonlinearity yam ntxwv sai sai thiaj li nws kuj (Ohm mus shares) thiab shunts lub load. Yog li ntawd nws yog kev tiv thaiv, thiab cov absorbed zog yog dissipated li thaum tshav kub kub. Thaum lub sij hawm xws dab mus varistor tam sim no ntawm ob peb txhiab amperes. Xav yuav luag inertialess ntaus ntawv tom qab mem tes extinguished, nws dua yuav ntau resistive ntaus ntawv. Yog li, nyob rau hauv ib txwm tej yam kev mob, nws tsis cuam tshuam rau lub lag luam ntawm hluav taws xob khoom. Tab sis yuav muaj pulses ntawm txaus ntshai voltage, ces so assured - lawv yuav txiav tawm. Qhov no saib kuas ruaj ntseg ntawm txawm tias ib tug tsis muaj zog rwb thaiv tsev.

Cov feem nrov qauv

Hais txog lub varistor, nws yog dab tsi, peb yuav tsis quav ntsej cov ntaub ntawv los ntawm uas nws yog tsim los. Cov feem ntau lug siv li uas yog ua siv zinc oxide. Qhov no yog vim ob peb yog vim li cas:

1. raug simplicity.
2. Zinc muaj ib tug zoo peev xwm los nqus high-voltage pulses.

lawv yog tsim los ntawm "tej hub" technology, uas yuav pressing, firing, daim ntawv thov ntawm cov electrodes thiab hluav taws xob rwb thaiv tsev, los ua ke thiab soldering pins conformal coatings. Vim lub simplicity ntawm kev siv thiab ua uas yuav tau tsim txawm nyob rau hauv tus neeg txiav txim.

npav

Peb muaj txaus mloog them rau txoj kev tshawb no ntawm dab tsi yog ib tug varistor. Labeling ntawm no ntaus ntawv yog nyuab, thiab yog li ntawd lub tshaaj ntawm lub ntaus ntawv nws yuav tsis tau pom los ntawm cov ntaub ntawv muab tso rau lub vaj tse. Xav txog ntawm no nyob rau qhov kev piv txwv: muaj CNR-06D400K. CNR - yog lub npe ntawm lub hom, nyob rau hauv cov ntaub ntawv no peb muaj ib tug hlau oxide varistor. 06 - nws muaj ib lub cheeb ntawm 6 millimeters. D - nyob rau hauv pem hauv ntej ntawm peb ib tug disk varistor. 400 - voltage lub lag luam. K - Tsab ntawv no hais tias cov tau sib txawv kam muaj ib qho yuam kev ntawm 10%. Yog hais tias peb tham txog cov computer technology, lawv muaj varistors yog tsim rau 470V. Pom zoo, ib tug ntau. Tab sis tsis muaj ib lub varistor! Npav cov khoom yog nyob rau txhua txhua loj Chaw tsim tshuaj paus nyob rau hauv nws tus kheej txoj kev, li ntawd, universal thiab kev paub cai muaj. Yog li ntawd nws yog tsim nyog los siv los yog siv cov neeg muag khoom, los yog siv cov kev pab cuam ntawm cov.

duab

Yog hais tias peb tsis xav kom cov cov khoom tau hlawv, nws yog ib qho tseem ceeb rau peb varistor. Los nyob rau hauv daim duab zoo li ib tug dog dig resistor, tab sis muaj ntau oblique kab thiab tsab ntawv U. Nws yog hais tias qhov kev kawm yog ncaj qha nyob rau ntawm voltage theem. Tiam sis tej zaum nyob rau hauv ib tug txawv txoj kev uas saib varistor. Los nyob rau hauv lub daim duab yog muaj teev raws RU rau nws, thiab ces qhia rau cov xov tooj. Tus xov tooj yog ib tug serial tooj, tab sis cov tsiaj ntawv xa mus rau lub npe ntawm tus ntaus ntawv: ib resistor-varistor. Cov ntaub ntawv kuj yuav designations. Qhov no yuav tsum tau ntaus nqi rau nrov domestic khoom, uas yog manufactured nyob rau hauv lub Hoobkas "Progress" nyob rau hauv Ukhta. Lawv varistor rau lub tswvyim yuav tsum khij los ntawm cov tsiaj ntawv A rau G.

Kos caij kawm

Ntawm no peb muaj nyob rau hauv lub ob txhais tes ntawm cov varistor. Yuav ua li cas rau kos yog hais tias nws ua hauj lwm? Hauv paus yeej ib txwm tsim nyog los ntawm lwm soj ntsuam. Koj yuav tsum ua tib zoo saib lub vaj tse tawg, tawg, blackening los yog ib co kua nplaum ntawm hmoov quav. Yog hais tias muaj yog lwm tsis xws luag, ces qhov no nyob ib leeg yuav qhia tau tias lub caij yuav tsum tau hloov los yog tsis nyob rau hauv tag nrho cov. Yog hais tias lub soj ntsuam pom tsis muaj teeb meem, ces koj yuav npaj mus xyuas lub multimeter. Nyob rau hauv cov ntaub ntawv no, lub tester yuav tsum tau switched mus rau lub ntsuas hom, lub siab tshaj plaws kuj. Qhov ntawd yog qhov uas yooj yim txoj kev uas yuav qhia tau yog tias ib tug varistor neeg ua hauj lwm. Yuav ua li cas rau kos yog hais tias nws ua hauj lwm, peb twb tau them, cia sib tham txog yuav ua li cas khaws lub tsim nyog hais.

Optimum kev khiav hauj lwm hom

Vim lub high linearity ntawm lub ntaus ntawv mus rau nrhiav tau qhov zoo tshaj plaws qhov chaw rau lub tswvyim - tsis muaj hauj lwm yooj yim. Rau lub hom phiaj no es nyuab thiab heev heev suav. Great tseem ceeb nyob rau hauv cov ntaub ntawv no yog ua si los ntawm cov kev khiav hauj lwm tam sim no, tus nqi ntawm uas yuav tsum tau tsawg heev thiab tsis ua rau overheating ntawm tus dais. Tiam sis ntawm no nws yog tsim nyog los sib npaug. Tom qab tag nrho, yog tias koj siv ib yam nkaus thiab tsis tshua muaj kev khiav hauj lwm tam sim no, nws yuav ua rau kom lub voltage txwv thiab lub tsev yuav tsis ua nws yooj yim muaj nuj nqi. Raws li cov "tub nkeeg" embodiment thiaj txais yuav ib txoj ntsiab cai khiav hauj lwm ncaj voltage yuav tsum tsis txhob ntau tshaj 0.85 lub sij hawm lub varistor chaw pib. Txawm li cas los, qhov no yooj yim mus kom ze yog tsis heev feem xyuam rau kev xyaum. Tom qab tag nrho, ua hauj lwm yog hais MOV, thiab cov kev kawm tau, thiab cov uas muaj kev txwv yuav tsum tau xaiv rau txhua cov ntaub ntawv.

Xaiv thiab installation

Hais txog qhov tseeb hais tias lub varistors yuav tsum tau muab tso rau thaum uas tig mus rau tus tiv thaiv hluav taws xob khoom, peb twb hais. Qhov tseem nyiam lo lus uas peb mounting varistors yog qhov chaw tom qab lub switching ntaus ntawv (thaum saib los ntawm lub load yuav tsum tau muaj kev tiv thaiv). Raws li ib qho piv txwv ntawm lub tiav lawm dlaws yuav ua khoom ntawm lub yav tas los hais "Progress" nroj tsuag hu ua "lam ua-1." Qhov no varistor yog tsim los yuav ruaj mus rau lub fais vaj huam sib luag. Tsaug rau nws, koj muaj peev xwm cia li siv ib tug peb-theem load tiv thaiv tswvyim nrog ib tug compound ntawm ib tug "lub hnub qub" los yog "daim duab peb sab". Los xwb xaiv cov kev tiv thaiv ntawm hluav taws xob sib 3, uas yog powered los ntawm ib tug peb-theem network.

tsis

Hais txog lub varistor, nws yog dab tsi, peb yuav tsis quav ntsej nws tus yam ntxwv uas yog ib qho tseem ceeb nyob rau hauv koj txoj hauj lwm?

1. Classification voltage. Yog li ntawd peb hu tus nqi uas ib tug tam sim no ntawm 1 ma ntws los ntawm lub ntaus ntawv.
2. Qhov siab tshaj plaws permissible alternating voltage. Qhov no yog hais txog mus rau tus nqi uas tus varistor yog tshuab txais thiab pib ua raws li nws cov kev tiv thaiv nuj nqi.
3. Qhov siab tshaj plaws permissible nruam voltage. Cov tib yam li yav dhau los version. Tab sis nyob rau hauv cov ntaub ntawv no nws los ua hauj lwm nrog ib qhov tam sim no.
4. Qhov siab tshaj plaws voltage txwv. Qhov no yog tus nqi uas lub varistor tau khiav lag luam yog tsis muaj kev puas tsuaj. Raws li ib tug txoj cai, nws teev nyias rau txawv tam sim no qhov tseem ceeb. Yog hais tias koj ntau tshaj qhov no npaum li cas, lub varistor yuav tawg nyob rau hauv ib nrab los yog txawm smashed rau pieces.
5. Qhov siab tshaj plaws absorbed zog. Qhia nyob rau hauv joules. Yog lub nqi siab tshaj plaws ntawm mem tes zog uas yuav dissipated los ntawm ib tug varistor nyob rau hauv daim ntawv ntawm tshav kub tsis hem thawj kom cov ntaus ntawv nws tus kheej.
6. Lo lus teb lub sij hawm. Qhov no tau saib ntsoov txog rau cov uas tus ntaus ntawv txav los ntawm ib lub xeev mus rau lwm lub, yog lub siab tshaj plaws permissible voltage tau zoo tshaj. Feem ntau ntsuas nyob rau hauv kaum ntawm nanoseconds.
7. Kam rau ua. Qhov no tus nqi hloov rau cov uas tsim nyog varistor voltage yog xam qub. Yuav qhia raws li ib feem pua. Raws li yuav tsum to taub los hauv tsab xov xwm saum toj no, qhov kev xaiv no yog qhia los ntawm cov tsab ntawv thaum lub kawg ntawm lub npav.

kev siv cov

Cia peb xav txog, piv txwv li, ib tug network ntawm 220 volts. Vim nws yuav tau optimized rau pab kiag li lawm uas ua rau voltage yog 275-420V ntau (tab sis muaj ib co kev cov ntsiab lus, peb yuav tsis kov). Raws li ib tug kab lim yog siv peb varistor. Lawv thaiv lub nkag mus ntawm pulses thiab lub voj-theem Circuit Court. Tab sis yog vim li cas peb ntawm lawv? Nws zaum kuj tshwm sim yog hais tias cov xov xwm ris hauv qab cov ntawv qhia txog cov teeb meem, vim uas muaj ntau tus neeg poob lawv electronics. Qhov no tshwm sim thaum twg, es tsis txhob xoom thiab ib theem-by-hlau yog ib lo lus nug tsuas yog tus tom kawg. Rau cov khoom yog yuav luag ib txwm tej yam kev tuag. Tab sis lub xub ntiag ntawm lub varistor ntawm xoom ntse tiv thaiv tiv thaiv tej lub sijhawm. Nyob rau hauv ib qho ua piv txwv piv txwv li, cov xov tooj txawb. Yog li ntawd lawv tsis tshuab, siv tej yam me me multilayer varistors. Nyob rau hauv tas li ntawd, lawv muaj peev xwm yuav nrhiav tau nyob rau hauv lub khoom siv Telecom thiab tsheb electronics.