Dab tsi yog qhov resistor? Symbol, Hom, Thaiv, Daim Ntawv Thov

Ib tug resistor yog ob-terminal passive hluav taws xob tivthaiv uas cov khoom muag hluav taws xob ua hauj raws li cov khoom siv hluav taws xob los txwv qhov ntws ntawm hluav taws xob tam sim no. Nws yog siv nyob rau hauv hluav taws xob circuits rau kev sib cais voltage, tam sim no txo, suab suppression thiab lim.

Tab sis tus resistor ntau ntxiv tshaj qhov no. Yog li yog tias koj yog tus tshiab rau hluav taws xob lossis tsuas yog xav paub ntau ntxiv txog qhov resistor yog dab tsi, ces qhov kev tshaj tawm blog no yog rau koj!

Dab tsi yog qhov resistor ua nyob rau hauv hluav taws xob Circuit Court?

Lub resistor yog ib qho khoom siv hluav taws xob tswj qhov ntws ntawm tam sim no nyob rau hauv ib lub voj voog thiab resists qhov ntws ntawm hluav taws xob. Resistors tiv thaiv surges, surges thiab cuam tshuam los ntawm kev ncav cuag rhiab electronics xws li cov khoom siv hluav taws xob digital.

Resistor cim thiab unit

Unit ntawm kev tiv thaiv yog Ohm (cim Ω).

Resistor yam ntxwv

Resistor yog cov khoom siv hluav taws xob txwv tsis pub khiav hluav taws xob tam sim no rau tus nqi muab. Qhov yooj yim tshaj plaws resistors muaj ob lub davhlau ya nyob twg, ib qho yog hu ua "hom davhlau ya nyob twg" lossis "hauv av davhlau ya nyob twg" thiab lwm qhov yog hu ua "hauv av davhlau ya nyob twg". Resistors yog cov khoom siv hlau, tab sis lwm cov geometry kuj tau siv.

Kuv vam tias tam sim no koj muaj kev nkag siab zoo dua ntawm qhov resistor yog dab tsi.

Qhov thib ob feem ntau yog cov duab geometric yog ib qho thaiv hu ua "chip resistor" thiab khawm hu ua "carbon compound resistor".

Resistor muaj xim kab txaij nyob ib ncig ntawm lawv lub cev los qhia lawv qhov tseem ceeb tiv thaiv.

Resistor xim code

Resistors yuav muaj xim coded los sawv cev rau lawv hluav taws xob kom muaj nuj nqis. Nws yog raws li tus qauv coding thawj zaug tsim nyob rau xyoo 1950 los ntawm United Electronic Component Manufacturers Association. Txoj cai muaj peb xim xim, uas qhia los ntawm sab laug mus rau sab xis tus lej tseem ceeb, tus lej ntawm xoom thiab qhov kam rau ua ntau yam.

Ntawm no yog ib lub rooj ntawm resistor xim codes.

Koj tuaj yeem siv lub ntsuas ntsuas xim resistor.

Resistor hom

Resistor hom muaj nyob rau hauv ntau yam sib txawv Qhov ntev, cov ntaub ntawv, rated zog и voltage txwv. Paub txog hom resistor yog ib qho tseem ceeb thaum xaiv tus resistor rau ib lub voj voog vim koj yuav tsum paub tias nws yuav ua li cas nyob rau hauv tej yam kev mob.

carbon resistor

Cov pa roj carbon compound resistor yog ib qho ntawm ntau hom resistors siv niaj hnub no. Nws muaj kev ruaj ntseg kub zoo heev, tsis muaj suab nrov ua haujlwm thiab tuaj yeem siv tau ntau zaus. Cov pa roj carbon compound resistors tsis yog tsim los rau kev siv hluav taws xob siab dissipation.

hlau zaj duab xis resistor

Hlau zaj duab xis resistor muaj feem ntau ntawm cov txheej txheej ntawm aluminium uas ua raws li cov khoom siv tiv thaiv, nrog cov txheej txheem ntxiv los muab kev tiv thaiv rwb thaiv tsev los ntawm tshav kub, thiab cov txheej txheem ua kom tiav cov pob. Nyob ntawm seb hom, cov hlau zaj duab xis resistor tuaj yeem tsim rau kev ua haujlwm siab lossis kev siv hluav taws xob siab.

Carbon zaj duab xis resistor

Qhov no resistor zoo ib yam li hauv kev tsim rau cov hlau zaj duab xis resistor, tshwj tsis yog tias nws muaj cov txheej txheem ntxiv ntawm cov ntaub ntawv insulating ntawm cov khoom tiv thaiv thiab cov txheej txheej conductive los muab kev tiv thaiv ntxiv tiv thaiv tshav kub thiab tam sim no. Nyob ntawm hom, cov pa roj carbon zaj duab xis resistor tuaj yeem tsim los rau kev ua haujlwm siab lossis kev siv hluav taws xob siab.

Hlau qhov txhab resistor

Qhov no yog ib lo lus ntes-tag nrho rau txhua qhov resistor qhov twg cov khoom tiv thaiv yog ua los ntawm cov hlau es tsis yog zaj duab xis nyias raws li tau piav qhia saum toj no. Wirewound resistors feem ntau yog siv thaum lub resistor yuav tsum tiv taus los yog dissipate siab zog.

High voltage hloov pauv resistor

Qhov no resistor muaj cov pa roj carbon ntau dua li nyias zaj duab xis resistive thiab siv rau hauv cov ntawv thov uas yuav tsum tau muaj kev sib cais ntawm qhov hluav taws xob siab thiab kev ruaj ntseg siab ntawm qhov kub siab.

Potentiometer

Lub potentiometer tuaj yeem xav tias yog ob qhov sib txawv ntawm cov resistors txuas rau hauv kev sib piv. Qhov kev tawm tsam ntawm ob qho tib si sab nrauv yuav hloov pauv thaum lub wiper txav mus raws li cov lus qhia kom txog rau thaum qhov siab tshaj plaws thiab qhov tsawg kawg nkaus txwv.

thermistor

Qhov no resistor muaj qhov zoo kub coefficient, uas ua rau nws tsis kam mus nce nrog nce kub. Feem ntau, nws yog siv vim nws qhov kub tsis zoo coefficient ntawm tsis kam, qhov twg nws tsis kam txo nrog nce kub.

varistor

Qhov no resistor yog tsim los tiv thaiv circuits los ntawm high voltage transients los ntawm thawj muab ib tug heev tiv taus thiab ces txo nws mus rau ib tug qis nqi ntawm high voltages. Lub varistor yuav txuas ntxiv mus dissipate lub zog siv hluav taws xob raws li cua sov kom txog thaum nws tawg.

SMD resistors

Lawv me me, tsis tas yuav tsum tau mounting nto rau installation thiab yuav siv tau nyob rau hauv heev siab ceev mesh. Qhov tsis zoo ntawm SMD resistors yog tias lawv muaj tsawg dua tshav kub dissipating cheeb tsam dua li ntawm lub qhov resistors, yog li lawv lub zog txo.

SMD resistors feem ntau yog tsim los ntawm керамический cov ntaub ntawv.

SMD resistors feem ntau yog me dua li ntawm lub qhov resistors vim lawv tsis tas yuav tsum tau mounting daim hlau los yog PCB qhov rau nruab. Lawv kuj siv qhov chaw PCB tsawg dua, uas ua rau muaj qhov ceev ntawm Circuit Court ntau dua.

Ruaj qhov khuam Kev siv ntawm SMD resistors yog tias lawv muaj tsawg dua tshav kub dissipation thaj tsam dua li ntawm qhov, yog li lawv lub zog txo. Lawv kuj nyuaj dua rau kev tsim thiab solder tshaj los ntawm resistors vim lawv nyias nyias hlau hlau.

SMD resistors tau xub pib thaum kawg 1980s. Txij thaum ntawd los, cov thev naus laus zis me me, qhov tseeb dua cov resistor tau tsim, xws li Hlau Glazed Resistor Networks (MoGL) thiab Chip Resistor Arrays (CRA), uas tau ua rau muaj kev txo qis ntawm SMD resistors.

Niaj hnub no, SMD Resistor thev naus laus zis yog cov cuab yeej siv hluav taws xob ntau tshaj plaws; nws tau ceev technology tseem ceeb. Los ntawm-qhov resistors yog ceev ceev los ua keeb kwm raws li lawv tam sim no tshwj xeeb rau kev siv niche xws li tsheb suab, theem teeb pom kev zoo thiab "classic" instruments.

Kev siv cov resistors

Resistors yog siv rau hauv Circuit Court boards ntawm xov tooj cua, TV, xov tooj, lub tshuab xam zauv, cuab yeej, thiab roj teeb. 

Muaj ntau ntau hom resistors, txhua tus nrog lawv tus kheej cov txheej txheem ntawm kev siv. Qee qhov piv txwv ntawm kev siv cov resistors:

• Cov cuab yeej tiv thaiv: tuaj yeem siv los tiv thaiv cov khoom siv los ntawm kev puas tsuaj los ntawm kev txwv cov dej ntws los ntawm lawv.
• Kev tswj hluav taws xob: tuaj yeem siv los tswj qhov voltage hauv ib lub voj voog.
• Kev tswj qhov kub thiab txias: tuaj yeem siv los tswj qhov kub ntawm lub cuab yeej los ntawm dissipating tshav kub.
• Teeb liab attenuation: Yuav siv tau los ua kom qis lossis txo cov teeb liab zog.

Resistor kuj tseem siv tau rau hauv ntau yam khoom siv hauv tsev. Qee qhov piv txwv ntawm cov khoom siv hauv tsev:

• Lub teeb: Ib tug resistor yog siv nyob rau hauv lub teeb qhov muag teev los tswj cov tam sim no thiab tsim ib tug tas li brightness.
• Qhov cub: Ib qho resistor yog siv rau hauv qhov cub kom txo cov nqi tam sim no los ntawm cov cua sov. Qhov no pab tiv thaiv lub caij los ntawm overheating thiab ua rau lub qhov cub puas.
• Toasters: Ib tug resistor yog siv nyob rau hauv lub toaster los txwv tus nqi ntawm tam sim no dhau los ntawm lub cua sov caij. Qhov no pab tiv thaiv lub caij los ntawm overheating thiab ua puas lub toaster.
• kas fes txiag: Ib qho resistor yog siv rau hauv lub tshuab kas fes kom txo cov nqi tam sim no los ntawm cov khoom cua sov. Qhov no pab tiv thaiv lub caij los ntawm overheating thiab ua rau lub tshuab kas fes puas.

Resistor yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob digital thiab siv ntau yam kev siv. Lawv muaj nyob rau hauv ntau hom kev kam rau siab, wattages thiab kuj muaj nuj nqis.

Yuav siv cov resistors hauv Circuit Court li cas

Muaj ob txoj hauv kev los siv lawv hauv qhov hluav taws xob hluav taws xob.

• Resistors nyob rau hauv series yog cov resistors uas tam sim no Circuit Court yuav tsum ntws los ntawm txhua tus resistor. Lawv txuas nrog nyob rau hauv series, nrog ib tug resistor nyob ib sab mus rau lwm yam. Thaum ob los yog ntau dua resistors txuas nrog hauv koob, tag nrho cov kev tiv thaiv ntawm Circuit Court nce raws li txoj cai:

Robsch = R1 + R2 + ………Rн

• Resistors nyob rau hauv parallel resistors uas txuas nrog cov ceg sib txawv ntawm cov hluav taws xob hluav taws xob. Lawv kuj hu ua parallel txuas resistors. Thaum ob los yog ntau dua cov resistors txuas nrog nyob rau hauv parallel, lawv qhia tag nrho cov tam sim no ntws los ntawm Circuit Court yam tsis hloov nws voltage.

Txhawm rau nrhiav qhov sib npaug ntawm qhov sib npaug ntawm cov resistors, siv cov qauv no:

1/Req = 1/R1 + 1/R2 + ……..1/rn

Qhov voltage ntawm txhua tus resistor yuav tsum yog tib yam. Piv txwv li, yog tias plaub 100 ohm resistors txuas nrog rau qhov sib npaug, ces tag nrho plaub yuav muaj qhov sib npaug ntawm 25 ohms.

Qhov tam sim no dhau los ntawm Circuit Court yuav nyob twj ywm zoo li yog siv ib qho resistor. Qhov voltage thoob plaws txhua 100 ohm resistor yog halved, yog li es tsis txhob ntawm 400 volts, txhua tus resistor tam sim no tsuas muaj 25 volts.

Ohm txoj cai

Ohm txoj cai yog yooj yim tshaj plaws tag nrho cov kev cai ntawm hluav taws xob circuits. Nws hais tias "qhov tam sim no uas dhau los ntawm tus neeg xyuas pib ntawm ob lub ntsiab lus yog ncaj qha proportional rau qhov sib txawv ntawm qhov sib txawv ntawm ob lub ntsiab lus thiab inversely proportional rau qhov tsis kam ntawm lawv."

V = I x R or V/I = R

qhov twg,

V = voltage (V)

Kuv = tam sim no (amps)

R = tsis kam (ohm)

Muaj 3 versions ntawm Ohm txoj cai nrog ntau daim ntawv thov. Thawj qhov kev xaiv tuaj yeem siv los ntsuas qhov ntsuas hluav taws xob poob thoob plaws qhov paub txog kev tiv thaiv.

Qhov kev xaiv thib ob tuaj yeem siv los xam qhov tsis kam ntawm qhov paub txog qhov poob qis.

Thiab nyob rau hauv qhov kev xaiv thib peb, koj tuaj yeem xam qhov tam sim no.

Video tutorial txog dab tsi resistor yog

Dab tsi yog resistor - Electronics Tutorial Rau Beginners

Xav paub ntau ntxiv txog cov resistors.

xaus

Tsaug nyeem ntawv! Kuv vam tias koj tau kawm dab tsi resistor yog dab tsi thiab nws tswj qhov ntws ntawm tam sim no. Yog tias koj pom tias nws nyuaj rau kev kawm electronics, tsis txhob txhawj. Peb muaj ntau lwm cov ntawv blog thiab cov yeeb yaj kiab los qhia koj cov hauv paus ntawm electronics.