Zoo li ntau lub tshuab hluav taws xob, resistors tuaj ntau hom duab, qhov ntau thiab tsawg, cov kev pabcuam thiab hom. Tag nrho cov tsis tuaj yeem tsis tsim muaj vaj huam sib luag, li cas los xij. Txhua hom ntawm resistor muaj qhov sib txawv qhov tseem ceeb rau kev tswj suab, tiv taus, qhov ntsuas qhov ntsuas, kub coefficient, voltage coefficient, lus teb rau ntau, me me, thiab kev cia siab. Cov kev sib txawv no ua rau kom zoo thiab muaj kev txwv kom ua tau zoo rau qee qhov kev tawm tsam hauv qee cov kev siv thiab qhov teebmeem npau suav phem rau lwm tus.
Carbon Combustion Resistors
Cov kab mob hauv nruab nrab cov kab mob uas siv los ua ntau hom kev tiv taus uas siv hauv tshuab hluav taws xob vim lawv tus nqi qis dua thiab lawv txoj kev ntseeg zoo. Cov kab mob ntawm cov kab uas siv cov kab mob siv cov khoom thaiv los ntawm cov hmoov ua kua, cov kab hlau insulating, thiab ib phau ntawv. Cov tsis haum yog tswj los ntawm qhov sib txawv ntawm cov pa roj carbon rau cov ntaub ntawv cov ntaub ntawv. Cov kab sau nyob rau hauv cov resistor yog mob los ntawm tej yam kev mob, tshwj xeeb tshaj yog humidity, thiab nyhav hloov hauv kev tawm tsam lub sij hawm. Vim li no, cov kab mob hauv cov kwj pwm muaj qhov tsis kam lees, feem ntau tsuas yog 5% xwb. Cov cwj pwm ntawm cov roj carbon dioxide muaj peev xwm txwv tsis pub siv fais fab li ntawm 1 watt. Nyob rau hauv sib piv rau lawv cov neeg pluag tolerances thiab tsis muaj hwj chim, cov kab mob hauv cov zauv uas muaj cov lus teb zoo uas ua rau lawv muaj kev xaiv rau kev siv ntau zaus.
Cov yeeb yaj kiab ua Resistors
Cov yeeb yaj kiab carbon fiber ntau siv cov pa roj carbon ntawm sab saum toj ntawm ib cov kab uas tsis muaj kab tsho uas tau txiav rau txoj kev nqaim, ntev ntev. Los ntawm kev tswj qhov ntev ntawm txoj kev thiab qhov dav, qhov kev ua hauj yuav ua tau precisely tswj nrog tolerances kom nruj li 1%. Zuag qhia tag nrho, qhov muaj peev xwm ntawm cov yeeb yaj kiab ntawm cov yeeb yaj kiab yog zoo dua li cov pa roj carbon dioxide resistor, nrog fais fab kev mus txog 5 watts thiab zoo zog. Txawm li cas los xij, lawv cov lus teb tuaj yeem ua rau mob loj dua vim qhov inductance thiab capacitance los ntawm txoj kev tawm tsam mus rau hauv movie.
Hlau zaj duab xis Resistors
Ib qho ntawm hom ntau hom kab xev tshaj li niaj hnub siv yog cov xim hlau zaj dab neeg. Lawv zoo heev hauv kev tsim kho rau cov yeeb yaj kiab fib fab, nrog rau qhov sib txawv loj yog siv cov hlau hlau ua cov khoom siv tiv thaiv es tsis yog carbon. Cov hlau txhuam siv, feem ntau yog cov xaim nickel-chromium alloy, nws muaj peev xwm muab tighter kuj tolerance dua carbon cov kob fib fab uas nrog tolerances li kaw li 0.01%. Cov yeeb yaj kiab ntawm hlau yog muaj txog li 35 watts, tab sis cov hau kev xaiv kuj pib ploj zuj zus mus 1-2 watts. Hlau zaj duab xis uas yog cov uas tsis tshua muaj suab nrov, thiab ruaj khov nrog kev hloov me ntsis vim muaj qhov kub thiab txias.
Thick Film Resistors
Los ua neeg nyiam nyob rau xyoo 1970s, tuab tuab zaj duab xis uas yog cov teeb saum feem ntau ntawm cov teeb meem niaj hnub no. Lawv ua nyob rau hauv ib qho screen printing txheej txheem uas siv cov khoom siv hluav taws xob thiab iav sib xyaw kom haum hauv cov kua. Thaum cov resistor tau npo luam tawm, nws yog ci ntawm high kub kom tshem tawm cov kua thiab fuse qhov ceramic thiab iav composite. Pib, tuab zaj duab xis uas tsis muaj zog, tab sis hnub no lawv muaj kev kam nrog ua kom tsawg li 0.1% hauv cov pob khoom uas tuaj yeem ntes txog 250 watts. Tuab khawm zaj duab xis uas muaj qhov kub siab coefficient, nrog rau 100 ° C kub hloov ua kom txog li 2.5% hloov hauv kev ua haujlwm.
Thin Film Resistors
Kev qiv nyiaj los ntawm semiconductor processes, nyias zaj duab xis resistors yog los ntawm kev siv lub tshuab nqus tsev vacuum hu ua sputtering qhov twg nyias txheej ntawm cov khoom siv hluav taws xob tso rau hauv ib qho insulating substrate. No cov txheej txheem nyias ces yog yees duab etched los tsim cov qauv khov kho. Los ntawm txoj kev tswj cov khoom ntawm cov khoom siv thiab cov qauv tiv taus, ua kom nruj li ntawm 0.01% yuav ua tiav nrog cov yeeb yaj kiab nyias. Nyias cov yeeb yaj kiab uas tawv nqaij tsuas yog siv li ntawm 2.5 watts thiab qis dua qhov sib txawv dua li lwm hom resistor, tiam sis cov resistors ruaj khov heev. Muaj ib qho nqi rau lub precision ntawm nyias zaj duab xis uas feem ntau yog ob zaug tus nqi ntawm tuab zaj duab xis resistors.
Wirewound Resistors
Lub hwj chim siab tshaj plaws thiab feem ntau cov resistors yog wirewound resistors, tab sis tsis tshua muaj lawv ob leeg muaj hwj chim thiab meej ib zaug. Wirewound resistors yog tsim los ntawm wrapping lub siab tiv thaiv xaim, feem ntau yog ib tug nickel chromium alloy, ib ncig ntawm ib tug ceramic bobbin. Los ntawm kev sib tw, ntev, hlau los ntawm cov xaim thiab qhov qhwv qauv ntawm cov qauv ntawm lub wirewound resistor tuaj yeem ua rau daim ntawv thov. Kev tiv taus kev ua haujlwm yog li nrawm li 0.005% rau kev tswj ntawm qhov ntsuas ntawm qhov muaj tseeb wirewound thiab tuaj yeem pom nrog fais fab kev ntsuas txog li ntawm 50 watts. Lub hwj chim wirewound resistors feem ntau muaj peev xwm ntawm 5 los sis 10% tab sis muaj fais fab kev ntsuas hauv lub kauj vab ntau. Wirewound resistors tsis raug kev txom nyem los ntawm high inductance thiab cov peev xwm ntawm qhov kev tsim ntawm lawv kev tsim, uas txwv lawv tsawg daim ntaub ntawv.
Potentiometers
Varying ib lub teeb liab los yog kaw ib lub voj voog yog ib qho tshwm sim hauv hluav taws xob. Ib qho yooj yim rau kev tswj tus teeb liab yog los ntawm kev hloov resistor lossis potentiometer. Potentiometers feem ntau siv rau cov neeg siv analog hauv inputs xws li ntim ntawm cov tswj. Cov me me saum nruab ntug versions siv los qhib los yog txhim kho lub voj voog ntawm PCB ua ntej raug ntim thiab xa rov qab rau cov neeg siv khoom. Potentiometers yuav ua tau zoo heev, tig mus rau ntau qhov uas tsis tau hloov, tab sis feem ntau lawv yog cov yooj yim tib tig li uas txav ib wiper raws li txoj kev siv txoj kev hloov ntawm kev tawm tsam ze xoom mus rau qhov siab tshaj tus nqi. Potentiometers feem ntau muaj qhov qis tshaj qhov tsis muaj zog, cov cwj pwm tsis zoo, thiab qhov tsis sib haum xeeb. Txawm li cas los xij, lub peev xwm los hloov qhov tsis kam thiab kho ib lub teeb liab ua rau cov potentiometers muaj nuj nqis hauv ntau lub tswv yim tsim thiab hauv prototyping.
Lwm hom mob
Raws li nrog feem ntau yam, ntau yam tshwj xeeb resistor variants nyob ua ib ke. Qhov tseeb, muaj ntau yam xws li lub caij ua haujlwm hauv lub teeb pom kev zoo. Qee qhov txawv qee tus qauv tshwj xeeb yog muaj cua sov, hlau ntawv ci, oxide, shunts, cermet, thiab grid resistors rau npe ob peb.