Kev ntsuas ntawm cov resistors thiab lawv cov npe

Kev ntsuas ntawm cov resistors thiab lawv cov npe
Kev ntsuas ntawm cov resistors thiab lawv cov npe
Anonim

Resistor yog ib yam khoom ntawm hluav taws xob hluav taws xob uas ua haujlwm kom txo tau lub zog tam sim no hauv nws. Resistors kuj tseem siv los txo qhov voltage hauv ib ntu thiab faib cov tam sim no rau hauv nws cov khoom. Ntawm cov hluav taws xob circuits, resistors yog qhia los ntawm cov duab plaub me me nrog ib khub ntawm cov coj (ib qho ntawm ob sab nraud). Txawv teb chaws, resistors tau pom tias yog kab tawg.

resistor qhov tseem ceeb, series ntawm resistor qhov tseem ceeb, tus qauv resistor tus nqi
resistor qhov tseem ceeb, series ntawm resistor qhov tseem ceeb, tus qauv resistor tus nqi

Resistors muaj peb lub ntsiab tsis:

  1. Rated kuj (tus nqi tiv thaiv).
  2. Kev siab ntev.
  3. Txoj kev tawg.

Resistor ratings yog tus nqi ntawm lawv cov nominal tsis kam, uas yog, tus nqi teev los ntawm cov khw. Rated resistance yog ntsuas hauv ohms. Resistor yog siv nyob rau hauv yuav luag tag nrho cov kev lag luam uas muaj tsawg kawg yog ob peb yam khoom siv hluav taws xob. Qhov no ua rau muaj ntau yam kev tiv thaiv qhov tseem ceeb. Txawm li cas los xij, muaj cov nqi resistor uas yog universal.

Nws yog qhov nyuaj heev los ua tus resistor nrog tus nqi tseeb, yog li siv tus nqi xws li kev kam rau siab. Piv txwv li,Yog hais tias qhov nominal tsis kam yog 10 ohms, qhov tseeb nws yuav yog kwv yees li 9.98-10.1 ohms. Qhov kev ua yuam kev no yog hu ua kam rau ua thiab ntsuas raws li feem pua.

resistor qhov tseem ceeb, series ntawm resistor qhov tseem ceeb, tus qauv resistor tus nqi
resistor qhov tseem ceeb, series ntawm resistor qhov tseem ceeb, tus qauv resistor tus nqi

Fais fab dissipation yog lwm qhov tseem ceeb tshaj plaws kev txiav txim siab ntawm tus resistor. Cia peb piav qhia lub ntsiab lus ntawm qhov ntau npaum li cas. Lub resistor los ntawm cov hluav taws xob tam sim no dhau los ua kom sov tas li. Cov cua sov yog nyob ntawm lub zog ntawm qhov tam sim no. Txhua tus resistor muaj qee qhov ntsuas kub, tom qab ntawd nws overheats thiab hlawv tawm. Dissipated hwj chim yog tus nqi ntawm hluav taws xob tam sim no lub zog uas lub resistor yuav hlawv tawm. Zoo li tus nqi resistor, lub zog dissipation yog tus nqi tas li rau txhua tus resistor. Nws tau teev los ntawm cov chaw tsim khoom. Nyob rau hauv hluav taws xob circuits, lub hwj chim dissipation ntawm resistors yuav tsum tau qhia. Rau nws lub npe, oblique, kab rov tav thiab ntsug yog siv. Los ntawm cov kab uas tau piav qhia ntawm lub cim resistor, kev sib txuas tshwj xeeb yog tsim los qhia txog cov txiaj ntsig sib txawv. Tus qauv tsim nyog nyob rau hauv me me circuits nyob nruab nrab ntawm 1/8 watt thiab tsib watts. Lub zog dissipation rau ib qho resistor tuaj yeem xam los ntawm Ohm txoj cai rau ib feem ntawm lub voj voog. Txhawm rau txiav txim siab nws, koj yuav tsum paub lub zog tam sim no hauv Circuit Court thiab tus nqi nominal tsis kam ntawm tus resistor.

resistor
resistor

Txhua qhov kev ntsuas kev tiv thaiv yog tus qauv. Ntawd yog, muaj qee tus qauv resistor tus nqi. Cov nqi no, hauv lawvtig, kuj tau muab faib ua kab ntawm cov nqi resistor. Rau qhov ncaj qha tam sim no, muaj 6 kab xws li: E6, E12, E24, E48, E96, E192.

Rau kev hloov pauv tam sim no, tsuas yog kab E6 thiab qee zaus E3 siv. Cov lej hauv cov npe ntawm cov kab qhia txog tus lej ntawm cov denominations hauv kab no. Piv txwv li, ib tug xov tooj ntawm E6 ntsuam xyuas tsuas yog cov nram qab no muaj peev xwm kuj: 1, 0; kaum tsib; 2, 2; 3, 3; 4, 7; 6, 8.

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