Varistor: ukusebenza umgaqo, iimpawu, izabelo. njani a varistor?

Wabiza resistors semiconductor varistor, leyo bayakwazi yokunciphisa ukungawi amaxesha 10 ixabiso lokuqala ngokwandisa ombane. Umzekelo, ukuba resistor siyakwazi ukumelana ka 1000 megohms, kunye nokusetyenziswa kwale element oko 1000 ohms. Ngoko ke, lo uxhathiso kunciphisa xa ombane kwandisa.

Ngenxa umthetho, ukuba oxide metal okanye zinc oxide. Ukuba ukhangela iimpawu zangoku-ombane kule varistor, ukuze kuqwalaselwe ukuba unohlobo non-linear macala, okt ingasebenza nje kuphela kwi rhoqo kodwa ombane variable. Loo element encamathele ngaxeshanye kunye nomthwalo. njani a varistor? Xa ombane kwi-mbane wangoku udlula hayi izixhobo, ezizezi varistor. Loo isixhobo ikwazi ekusasazeni amandla ubushushu. mpawu zalo ziphambili - a kwakhona nokubuyiswa kwexesha, oko kukuthi, i-uxhathiso unalo inani lokuqala ngexesha ilahleko amandla.

Yintoni Umgaqo le varistor? Le nto kungekho obahlukileyo ukusukela resistor oqhelekileyo, oko kukuthi, ngexesha lokusebenza okuqhelekileyo bombane ine- ukuxhathisa ohmic. Ngoko ke, cinga yintoni na varistor umgaqo.

Isibonisi yenkcaso kakhulu eliphezulu kwaye ukufikelela 100,000 ohms. Xa ombane ivuliwe, oko kuncitshiswa msinyane nje kuvele imfuneko kwinqanaba ukukhuseleka. Ukumelana ukuwa ukusuka 100-000 ohms ukuya 100 Ukuba ixabiso uyawa umda phantsi, okanye ilingana zero, kungakhona circuit elifutshane. Kulo fuse, olukuye kwisekethi yombane phambi varistor lutshitshe. Emva koko, lo yombane ivaliwe kunye ombane icinyiwe ngokupheleleyo.

Njengoko kukhankanyiwe ngaphambili, xa kungekho ombane varistor uthole ngokupheleleyo kunye nomsebenzi kwimo enye. Kuba ukusebenza kwawo ufuna ukubuyisela fuse zingaphaphatheki. Ngaphezu koko, lo isixhobo yekhompyutha iza isebenze ngokuchanekileyo. Le varistor uhlobene ngaxeshanye umbane. Cinga varistor umgaqo yokusebenza, umzekelo ekhompyutheni eziqhelekileyo zobuqu. Ekubeni sele kwiitheminali ezimbini, uthimbo oluqhutywa kwisigaba enxuseneyo kunye zero.

Yintoni na le nto?

Olo lungiselelo, njengoko varistor, leyo iifoto kweli nqaku, ikhangeleka ngathi resistor oqhelekileyo, oko kukuthi, oku koxande ukumila kakuhle. Kodwa ngayo umahluko encinane. Phakathi kwalo ihamba oxwesileyo, ukuphela kwayo egosogoso.

Njengoko ziphawulwa nge varistor?

Namhlanje sikwazi ukuhlangabezana izihionipho ezahlukeneyo zezi zixhobo. umenzi ngalinye linelungelo ukuseta zalo. Ukumakishwa zingafani, kuba iimpawu zobugcisa varistors ahluka enye kwenye. Imizekelo iquka izinto ezifana ombane avumelekile okanye inqanaba yangoku ezinqwenelekayo.

Okwangoku, umenzi nganye imisela uphawu yayo phezu kwezi ntlobo izixhobo. Oku kubangelwa yinto yokuba izixhobo eyenziweyo kufuneka iinkcukacha ezahlukeneyo. Hi xikombiso, le ombane eliphezulu ngokuvunywe okanye yangoku ezifunekayo ukwenzela inqanaba nokusebenza. Eyona ethandwayo zokumakisha - CNR, iqhotyoshelwe ukuba kutyunjwa 07D390K. Kuthetha ntoni oku? Ngenxa yoko, ukwalathelwa CNR ngokwayo ibonisa uhlobo yesixhobo. Kulo mzekelo, i suppressor nokulatyuza i oxide yesinyithi.

Ngaphezu koko, 07 - isixhobo ubungakanani enobubanzi leyo ilingana no-7 mm. D - isixhobo diski, kwaye 390 - ixabiso ombane ubuninzi.

Eyona engundoqo Ipharamitha varistors

Ezi iparameters ziquka:

• liyana ombane;
• qondo liphezulu ka-AC and DC;
• Ukunciphisa amandla eliyincopho;
• iimpazamo engaba zikhona;
• nto emsebenzini.

ekuxilongweni

Ukuze uvavanyo le isixhobo se-elektroniki, sebenzisa izixhobo ezizodwa, ekuthiwa ngumhloli. Ngoko ke, uvavanyo kuya kufuneka i varistor, lo mgaqo eliza ukutshintsha imida bokuxhathisa kwaye isixhobo test. Phambi abaqala wayo, umele uvule ifowuni kwaye switsha kwi kwimo uxhathiso. Kuphela ke umatshini uya kudibana nazo zonke iimfuno eziyimfuneko zobuchwepheshe, yaye ixabiso ukumelana iya kuba enkulu.

Phambi zokwenza uvavanyo ukujonga imeko lobugcisa ifowuni. Into yokuqala ukujonga imbonakalo yakhe. Isixhobo kufuneka simahla iintanda, ngokunjalo nemiqondiso ukuba yatshiswa. Ngaba isiwe isixhobo nokuhlola ngokungakhathali, njengoko na ukusilela ezincinane kunokukhokelela izimo ezingemnandi.

Varistors: isicelo

izixhobo ezinjalo zidlala indima ebalulekileyo kubomi babantu. Ukusuka zonke ngasentla sinokuthi ukuba suppressor nokulatyuza, lo mgaqo eliza ukukhusela bombane ukususela ombane aphezulu kwi-network, ukunceda ukuthintela umonakalo unezixhobo ezininzi ezisebenzisa umbane kunye nokufakelwa ukugcina ingqibelelo. Eyona ndawo iphambili le sekethe zombane izixhobo ezahlukeneyo. Umzekelo, ukuba kwenzeka ekuqaleni-up lweziqalelo izibane, ezo ekwabizwa ngokuba ballasts. Kwakhona eesekethe zombane ezifakwe varistors ezizodwa, ukusetyenziswa apho kuyimfuneko ukuze uzinzise ombane kunye yangoku. izixhobo ezo isasetyenziswa nangoku imigca ngamandla. Kodwa apho ibizwa arresters, le ombane yokusebenza volts ngaphezu amabini amawaka.

Varistors unako ukusebenza kuluhlu ombane enkulu oqala ixabiso elincinane kakhulu kwi-3 V, yaye iphela 200 V. Ngokubhekisele element lwangoku, apha uluhlu ukususela 0.1 ukuya 1 A. La manani ngoku isebenza kuphela ukuba ombane aphantsi izixhobo zobugcisa .

iinkalo Emihle varistors

Olu hlobo izixhobo uneempawu ezintle, xa uthelekisa kunye nezinye izixhobo, ezifana arrester kwakhula. Ezi inzuzo ebalulekileyo ziquka:

• ukusebenza-High isantya element;
• ithuba zokulandela umahluko ngaphandle inertia ngu ngoku;
• ithuba ukusetyenziswa kumgangatho ombane kule kuluhlu ukususela nge-12 ukuya 1800;
• ubomi inkonzo ende;
• ngeendleko eziphantsi kakhulu ngenxa elula kokwakhiwa.

izinto ezimbi

Ndawonye inkitha yeenzuzo phezu kwezinye izixhobo, kukwakho neengxaki ezibalulekileyo, baba phakathi kwawo.

1. Varistors babe isixa omkhulu self-capacitance, nto leyo echaphazela umsebenzi womnatha yombane. Icandelo olunjalo kubakho iindidi ukususela 80 ukuya kuma- 3000 PF. Oku kuxhomekeke kwizinto ezininzi, uyilo kunye imbonakalo varistor, kwaye ixabiso ubuninzi kwinqanaba ombane le. Kubalulekile ukuphawula ukuba kwezinye iimeko, le ethile enkulu ube inzuzo enkulu. oku kunokwenzeka Kodwa kakhulu ezinqabileyo, umzekelo, xa usebenzisa i varistor kwi okucoca. Kule meko, umthamo omkhulu kuya kuba ngesiciko kwi ombane mbane.
2. Ethelekiswa arresters, varistors abakwazi uthothe ngesantya ubuninzi ombane.

Ukunyusa izinga kwesiphazamiso kuyimfuneko ukunyusa ubungakanani lweziqalelo, kwaye oku inxaxheba abavelisi abaninzi.

Izindululo kokufaka

Ukuba kukho imfuneko kuquka varistor olunamandla lombane ngamandla, kufuneka sikhumbule ezi ngongoma ibalulekileyo:

• Kufuneka sihlale sikhumbula ukuba le mveliso aziyi kuhlala ngonaphakade, kwaye kuya kufika ezinjalo iimeko eziya kukhokelela dubulo yayo. Ukuze uphephe oku, kufuneka usebenzise screens ezikhethekileyo yokhuselo apho unako ukubeka lonke varistor.
• Kufuneka kuqatshelwe ukuba izixhobo lenyengane yobugcisa enasilela kunezixhobo iimpawu oxide. Ngoko ke kungcono ukuba usebenzise olu hlobo varistor.

isiphelo

Varistor idlala indima ebaluleke kakhulu ekusebenzeni iziphaluka ezininzi zombane. Njengoko kuchaziwe ngaphambili, olu hlobo resistors semiconductor isebenza ukunciphisa yokusebenza ukumelana ne ombane ukwanda okanye ngoku. Ngenxa kule kungenzeka ukuba zifakelwe kwizixhobo ezininzi zombane. Xa ombane iintlanga varistor, injongo leyo sibhekiswe utshintsho ukumelana, ngaba akayaphula izixhobo. Kwakhona kuthintela baphelelwe kweentambo. Ngoko ke, ezi zinto ukuqinisekisa ukhuseleko kwi kwentlanga ombane womnatha.