Varistor: ua hauj lwm hauv paus ntsiab lus, yam ntxwv, txoj hauj lwm. Yuav ua li cas yog ib varistor?

Hu varistor semiconductor resistors, uas muaj peev xwm ntawm kev txo tus kuj muaj 10 lub sij hawm ntawm thawj zaug nqi los ntawm nce lub voltage. Piv txwv li, yog tias ib tug resistor muaj ib tug tsis kam ntawm 1000 megohms, nrog rau cov kev siv ntawm no lub caij nws yog 1,000 ohms. Yog li, cov kuj txo thaum lub voltage tsub kom.

Raws li ib tug txoj cai, lawv yog hlau oxide los yog zinc oxide. Yog hais tias koj saib nyob rau hauv lub tam sim no-voltage yam ntxwv ntawm lub varistor, tej zaum nws yuav muab sau tseg tias nws muaj ib tug uas tsis yog-linear symmetrical daim ntawv no, piv txwv li nws muaj peev xwm ua hauj lwm tsis tau tsuas yog nyob rau hauv ib qhov tab sis ib tug nce mus nce los voltage. Xws li ib tug caij txuas mus tib seem nrog lub load. Yuav ua li cas yog ib varistor? Thaum lub voltage nyob rau hauv lub mains tam sim no kis tsis yog los ntawm cov khoom, uas yog lub varistor. Xws li ib tug ntaus ntawv muaj peev xwm sawv ntawm faib lub zog li thaum tshav kub kub. Nws lub ntsiab nta - ib tug rov qab siv lub thiab rov qab lub sij hawm, uas yog, cov kuj muaj tus thawj daim duab thaum lub sij hawm hwj chim tsis tau.

Yuav ua li cas yog lub ntsiab cai ntawm lub varistor? Cov khoom no tsis sib txawv los ntawm ib tug dog dig resistor, uas yog, thaum lub sij hawm ib txwm lag luam ntawm lub electronics nws muaj ib tug ohmic kuj. Yog li ntawd, xav txog dab tsi muaj varistor hauv paus ntsiab lus.

Cov qhov taw qhia ntawm cov kuj yog heev siab heev thiab tej zaum yuav mus txog 100,000 ohms. Thaum lub voltage yog muab rau, tej zaum nws yuav raug txo kom sai li sai raws li qhov yuav tsum tau tshwm sim nyob rau hauv lub theem ntawm kev tiv thaiv. Kuj ntog los ntawm 100,000 ohms rau 100. Yog hais tias tus nqi poob rau cov uas tsis muaj kev txwv, los yog sib npaug zos rau zero, tej zaum yuav muaj ib tug luv luv Circuit Court. Nyob rau hauv no fuse, uas yog nyob rau hauv ib tug hluav taws xob Circuit Court ua ntej lub varistor tsis. Tom qab ntawd, qhov hluav taws xob Circuit Court yog kaw thiab cov voltage yog switched tawm kiag li.

Raws li twb tau hais, nyob rau hauv lub qhaj ntawv ntawm lub varistor voltage yuav kiag rov qab thiab ua hauj lwm nyob rau hauv tib lub hom. Rau nws cov lag luam uas koj xav kom hloov ib tug tshuab fuse. Ntxiv mus, lub tshuab hluav taws xob ntaus ntawv yuav ua kom raug. Lub varistor yog kev cob cog rua thaum uas tig mus rau lub hwj huam mov. Xav txog dab tsi muaj varistor hauv paus ntsiab lus ntawm lub lag luam, cov piv txwv ntawm ib tug dog dig tus kheej lub computer. Txij li thaum nws muaj ob tug terminals, lub Symptoms yog nqa tawm nyob rau hauv thaum uas tig mus thiab pes tsawg theem.

Yuav ua li cas yog qhov khoom?

Xws li ib tug kev kho, raws li cov varistor, uas muaj cov duab nyob rau hauv no tsab xov xwm, zoo li ib tug dog dig resistor, uas yog, yog lub nyob rau hauv lub cev. Tab sis tseem nws muaj ib tug me me qhov sib txawv. Nyob rau hauv lub midst ntawm nws sau kab pheeb ces kaum, qhov kawg ntawm uas yog nkhaus.

Raws li cim los ntawm ib tug varistor?

Niaj hnub no peb ua tau raws li txawv designations ntawm cov pab kiag li lawm. Txhua Chaw tsim tshuaj paus muaj cai teem nws tus kheej. Npav txawv, vim hais tias cov kev yam ntxwv ntawm varistors yog distinguished los ntawm txhua lwm yam. Piv txwv xws li tej yam tseem ceeb raws li pub voltage los yog tam sim no theem kev kawm.

Tam sim no, txhua chaw tsim tshuaj paus teev nws cov cim nyob rau hauv cov kev pab kiag li lawm. Qhov no yog vim lub fact tias lub manufactured pab kiag li lawm muaj ntau specifications. Piv txwv li, lub siab tshaj plaws permissible voltage los yog tam sim no yuav tsum tau rau cov hauj lwm theem. Cov feem nrov npav - CNR, uas yog txuas mus rau uas los raws li 07D390K. Qhov no txhais li cas? Yog li, txoj kev xaiv CNR nws tus kheej qhia lub hom ntaus ntawv. Nyob rau hauv cov ntaub ntawv no, lub surge suppressor yog ib tug hlau oxide.

Ntxiv mus, 07 - ib tug ntaus ntawv rau hauv lub loj ntawm ib lub cheeb uas yog sib npaug zos rau 7 hli. D - ib tug disk ntaus ntawv, thiab 390 - lub siab tshaj plaws voltage nqi.

Lub ntsiab tsis muaj varistors

Cov tsis muaj xws li:

• voltage cai;
• lub siab tshaj plaws nqi ntawm AC thiab DC;
• ncov zog haum;
• tau uas tsis;
• lub chaw ua hauj lwm yam khoom.

diagnostics

Yuav kom ntsuam xyuas qhov no siv hluav taws xob, siv tshwj xeeb cov khoom, uas yog hu ua tus tester. Yog li ntawd, lub xeem yuav tsum tau ib tug varistor, lub hauv paus ntsiab lus ntawm uas yog hloov cov kuj tsis thiab kuaj ntaus ntawv. Ua ntej nws pib, koj yuav tsum tig rau tus ntaus ntawv thiab hloov nyob rau hauv kuj hom. Tsuas yog ces lub tshuab yuav raws li tag nrho tsim nyog kev yuav tsum tau, thiab cov kuj nqi yuav loj loj.

Ua ntej nqa tawm kev ntsuam xyuas mus xyuas cov kev mob ntawm lub ntaus ntawv. Tus thawj tshaj plaws rau saib nyob rau ntawm nws qhov tsos. Cov kev ntsuas yuav tsum tsis pub muaj tej kab nrib pleb ntawm, raws li tau zoo raws li tej yam tshwm sim uas nws muab hlawv pov tseg. Yuav tsum tsis txhob raug coj mus rau lub kev soj ntsuam apparatus ua lwj ua liam, raws li tej me me tsis ua hauj lwm muaj peev xwm ua rau tsis kaj siab yam.

Varistors: daim ntawv thov

Xws li ua si ib qho tseem ceeb luag hauj lwm nyob rau hauv tib neeg lub neej. Ntawm tag nrho cov saum toj no peb yuav hais tias cov surge suppressor, lub hauv paus ntsiab lus ntawm uas yog los tiv thaiv cov electronics los ntawm high voltage rau lub network, pab tiv thaiv kom txhob puas tsuaj ntawm ntau hluav taws xob khoom siv thiab thaiv rau txuag ntseeg. Lub ntsiab venue yog qhov hluav taws xob Circuit Court nyob rau hauv txawv cov khoom. Piv txwv li, lawv tshwm sim nyob rau hauv lub start-up ntawm teeb pom kev zoo ntsiab, uas kuj hu ua ballasts. Tsis tas li ntawd hluav taws xob circuits ntsia tau rau hauv tshwj xeeb varistors, kev siv uas yog tsim nyog los tswj cov voltage thiab tam sim no. Xws li yog tseem siv nyob rau hauv hwj chim kav. Tab sis muaj lawv hu ua arresters, lub operating voltage ntawm ntau tshaj nees nkaum txhiab volts.

Varistors tau khiav lag luam nyob rau hauv ib tug loj voltage ntau yam uas yuav pib nrog ib tug heev me me muaj nqis nyob rau 3 V, thiab xaus 200 V. Raws li hais tus tam sim no lub caij, nyob ntawm no lub ntau yam ntawm los ntawm 0.1 mus rau 1 A. Cov tam sim no cov nuj nqis yog tsuas yog siv tau rau cov uas tsis voltage kev khoom .

Zoo yam ntawm varistors

Qhov no hom ntawm apparatus muaj ntau yam zoo, yog hais tias peb los sib piv nws nrog rau lwm cov pab kiag li lawm, xws li ib tug surge arrester. Tej yam tseem ceeb cov kev pab cuam muaj xws li:

• High-speed lag luam los ntawm lub caij;
• tau nrhiav sib txawv tsis inertia los ntawm tam sim no;
• tau siv nyob rau lub voltage theem nyob rau hauv ntau ntawm 12 mus rau 1800;
• ntev kev pab cuam lub neej;
• kuj tsis tshua muaj nqi vim simplicity ntawm kev tsim kho.

kev tsis zoo

Ua ke nrog xws li ib tug loj tus naj npawb ntawm zoo dua lwm yam pab kiag li lawm, tseem muaj teeb meem loj tsis zoo, cov uas yog.

1. Varistors muaj ib tug lossis loj npaum li cas ntawm yus tus kheej-capacitance, uas muaj feem xyuam rau lub chaw ua hauj lwm ntawm lub fais network. Tej tivthaiv yuav ua tau nyob rau hauv lub chav los ntawm 80 mus 3000 PF. Nws yog nyob ntawm ntau yam: cov tsim thiab cov tsos ntawm cov varistor, thiab cov nqi siab tshaj plaws ntawm lub voltage theem. Nws yog ib nqi sau cia hais tias nyob rau hauv tej rooj plaub, qhov no loj drawback yuav los ua ib tug tseem ceeb kom zoo dua. Tab sis qhov no yog tau yog heev tsawg, piv txwv li, yog tias koj siv ib tug varistor nyob rau hauv cov ntxaij lim dej. Nyob rau hauv no qhov teeb meem, peev xwm loj yuav pab raws li ib tug stopper nyob rau hauv lub mains voltage.
2. Piv nrog rau arresters, varistors yog tsis muaj peev xwm mus dissipate ntawm lub siab tshaj plaws nqi ntawm voltage.

Yuav kom nce tus nqi ntawm distraction yog tsim nyog los ua rau kom qhov luaj li cas ntawm lub ntsiab, thiab qhov no muab kev koom tes ntau producers.

Pom zoo rau installation

Yog hais tias muaj ib tug xav kom muaj ib tug varistor nyob rau hauv lub hwj chim daim phiaj, koj yuav tsum nco ntsoov cov ntsiab lus tseem ceeb:

• Koj yuav tsum nco ntsoov cia nyob rau hauv lub siab hais tias cov khoom no yuav tsis kav mus ib txhis, thiab yuav tuaj xws tej yam kev mob uas yuav ua rau nws tawg. Kom tsis txhob no, koj yuav tsum tau siv tshwj xeeb kev tiv thaiv cov ntxaij vab tshaus nyob rau hauv uas koj yuav muab tag nrho cov varistor.
• Nws yuav tsum tau muab sau tseg hais tias pob zeb uas tawv kev pab kiag li lawm yog tsis tau zoo nyob rau hauv lawv cov yam ntxwv oxide counterparts. Yog li ntawd nws yog zoo tshaj plaws los mus siv hom varistor.

xaus

Varistor plays ib qho tseem ceeb luag hauj lwm nyob rau hauv lub hauj lwm ntawm ntau hluav taws xob circuits. Raws li twb tau hais, qhov no hom ntawm semiconductor resistors ua hauj lwm pab kom txo kuj ua tau zoo nrog ua voltage los yog tam sim no. Vim li no cov tseem lawv ntsia tau rau hauv ntau hluav taws xob pab kiag li lawm. Thaum lub haiv neeg varistor voltage, lub hom phiaj uas yog raws kev coj kom muaj kev hloov nyob rau hauv kuj, tsis tawg pab kiag li lawm. Nws kuj tiv thaiv burnout thaiv. Yog li, cov ntsiab kom tiv thaiv nyob rau hauv cov haiv neeg voltage network.