Lub Zog ReseAtor Xaiv Siv

Yog tias xaiv lub zog tiv thaiv hluav taws xob tsim nyog ib txwm muaj teeb meem nyuaj rau peb lub zog engineering, ntawm no yog qee cov ntaub ntawv rau cov teeb meem no:
1. Lub zog ntawm resistor
Lub sijhawm ntsuas ntawm lub resistor yog txhais tias yog lub zog tshaj plaws tso cai yuav tsum tau noj los ntawm kev ua haujlwm ib txwm muaj ntawm cov chaw muaj cua sov tshwj xeeb, kwv yees tias huab cua tsis yog floriulating. Qhov ntsuas kub tau tshwj xeeb yog feem ntau 25 degree, 70 degree, thiab 125 degree. Nws yuav tsum tau taw qhia tias kev ua haujlwm ib txwm ua haujlwm ntawm lub resistor txhais tau tias tsis muaj kev puas tsuaj, tab sis kuj hais tias lub resistor tsis yog puas yuav tsum nyob hauv qhov tsis pub muaj ntau.
Feem ntau peb siv cov kev txo hwj chim kom piav qhia txog kev sib raug zoo ntawm lub hwj chim thiab qhov chaw kub ntawm lub resistor. Qhov siab dua cov huab cua sov, qhov ntau txwv qhov muaj peev xwm sov dissipation muaj peev xwm ntawm lub resistor thiab tus me zog. Thaum lub ambient kub txog qhov txwv, lub resistor poob nws lub peev xwm ua cua sov thiab nws lub hwj chim poob qis rau xoom.
2. Kev faib tawm cov muaj zog tiv taus
Feem ntau yog lub resistor nrog lub zog rated ntau dua tuaj yeem hu ua lub zog resistor. Raws li theem muaj zog sib txawv, nws muab faib ua cov khoom siv tsis zoo thiab muaj zog tiv taus. Raws li cov ntaub ntawv sib txawv thiab cov txheej txheem sib txawv, cov zog tiv thaiv feem ntau muab faib ua peb pawg: zaj duab xis tiv thaiv, thiab khoom cov ceramic resesors.
Wirewound lub zog tiv thaiv yog lub zog tiv taus. Wirewound resors feem ntau yog ua los ntawm winding ua hlau ntawm lub ceramic insulating substrate. Lawv tau cim los ntawm cov txheej txheem yooj yim, tus nqi pheej yig, thiab lub zog ntawm ib tus resistor tuaj yeem ncav ntau dua 3kW. Qhov tsis zoo yog qhov loj me, tsis pub lwm tus paub, kev ntseeg tau tsis zoo, thiab tsis sib luag zoo. Cov hauv qab no yog ntau cov wirewound lub zog tiv: pleev xim rau wirewone wirewound deistors, thiab high-fais fab corrugated wirewound resistors.
Zaj duab xis tiv thaiv feem xyuam tsuas yog xa mus rau cov phiaj xwm tuab tuab, uas feem ntau yog ua yeeb yaj duab tuab tawm ntawm alumina lossis txhuas nitride substrates. Hom kev tiv thaiv no muaj lub zog muaj zog loj thiab tsis muaj peev xwm lossis siv tau rau kev siv nyob rau hauv qhov chaw tsawg kawg nkaus tab sis muaj cua sov dissipation mob. Ib qho ntxiv, piv nrog wirewound resistors, zaj duab xis muaj ntau yam dav tsis kam tiv taus milliohms rau manehms. Film resistors kuj muaj qhov tsis xws luag. Qhov thib ib yog tias lub peev xwm tshaj dhau yog txwv thiab nws yooj yim rau kev puas tsuaj hauv lub zog mem tes, yog li kev ntseeg tau tsis muaj siab. Tsis tas li ntawd, zaj yeeb yaj kiab tawm tsam muaj cov xwm txheej ua kom sov, thiab lub dab dej uas haum rau kom ua tiav kom ua tiav lub zog. Kaibu Electronics tau tsim lub dav hlau tiv thaiv raws li cov yeeb yaj kiab hluavtaws tshuab. Lub hwj chim ceev yog tas li ua ke nrog ntawm tuab zaj duab xis ua kom lub cev, thiab kev ntseeg tau thiab muaj kev ruaj khov ntawm cov tsim tawm tau zoo dua. Hauv qab no yog ntau lub dav hlau hluav taws xob tiv taus raws li lub zog zaj duab xis thev naus laus zis.
Kev tsim khoom lag luam ntawm cov khoom tiv thaiv cericic tawm ntawm qhov sib txawv ntawm cov wirewound resistors thiab phiaj xwm lub zog tiv taus. Tom qab cov hmoov cov plowed cov ntaub ntawv tau sib xyaw, lawv tau tsim, sintered ntawm qhov kub thiab siv electrode, thiab thaum kawg tau ntim thiab kuaj. Qhov loj tshaj plaws ntawm cov khoom tiv thaiv ceramic ceramic thiab wirewone resistors thiab yog qhov haum rau lub zog tso tawm, uas yog capactring thiab tshem tawm. Khoom ceramic tsis txaus ntseeg yog tsis-inductive thiab ntseeg tau tias. Lawv muab faib ua hom hwj huam thiab mem tes raws li cov ntawv thov sib txawv.
3. Cov kev tsis sib haum xeeb tshwj xeeb hauv kev xaiv ntawm lub zog tiv taus
(1) Nws yog ib qho tsim nyog kom paub qhov txawv ntawm lub zog siab thiab cov ntawv thov high-chamte.
In many applications, such as battery pack pre-charging, capacitor charging and discharging, starting current limiting, arc protection, etc., the resistor does not need to work continuously for a long time at high power, but needs to withstand one or more periodic pulse energies. Qhov tsim nyog tshaj plaws tiv resistor rau daim ntawv thov no yog lub zog-lub zog tswj cov lag luam, tsis yog lub zog resistor. Ntawm chav kawm, xaiv ib qho resistor nrog lub zog txaus kuj tseem tuaj yeem ua tau raws li kev xav tau, tab sis tej yam muaj peev xwm muaj kev txaus ntshai. Piv txwv li, hauv lub high-zog wirewound resistor, tsuas yog cov tshuaj tiv thaiv Alloy yog qhov kev coj ua. Qhov hnyav ntawm cov xov hlau alloy tsuas yog ib feem me me ntawm tag nrho cov resistor. Thaum raug rau lub sijhawm luv luv ntawm cov mem tes cuam tshuam, cov cua sov tsis muaj sijhawm los ua kom muaj lub zog ua haujlwm, yog li cov pa roj carnating, uas yuav ua rau muaj kev phom sij rau lub resistor lossis cov kev pheej hmoo. Ntau cov neeg siv hluav taws kub tsis tsim los rau lub zog ua kom muaj zog thiab cov mem tes high-pulse load tsis tau coj mus rau hauv cov ntsiab lus thiab cov txheej txheem. Ib zaug thov rau mem tes circuits, nws yog ib qho yooj yim kom swb. Lub sijhawm them ua ntej tsim los ntawm Shenzhen Star Electronic Technology tag nrho cov kev kho mob hauv pulses thiab cov ntaub ntawv xaim hluav taws xob thiab cua sov sai sai.
(2) Tsis txhob them nyiaj rau kev tsim cua sov dissipation, thiab dhau- lossis hauv qab-reserving zog chaw.
Raws li peb tau hais ua ntej, lub zog ntawm ib qho resistor yog nws lub peev xwm sov dissipation. Cov cua sov tsis muaj peev xwm ntawm lub resistor tuaj yeem txhim kho los ntawm kev ua kom sov kom tsim nyog, cua txias, tshwj xeeb yog cov dav dav dav hlau, cia siab rau ntawm lub tshav kub loj. A to220 ntim cov phiajcim hluav taws xob tiv thaiv tuaj yeem muaj lub zog hluav taws xob ntawm 50W nrog lub tshuab cua sov, tab sis tsuas yog 1.5W yam tsis muaj lub dab dej sov.
Feem ntau cov kws tshaj lij yuav siv lub zog tiv taus ntawm kev txo cov kev ntsuas. Raws li cov tub rog cov qauv, qhov kev ntsuam xyuas feem ntau raug txo los ntawm ib nrab. Qee zaum, kev txo qis ntxiv yog qhov yuav tsum tau los txo cov kauj vab kub. Txawm li cas los xij, qhov nyiaj txo yuav tsum tau txiav txim siab ua ke nrog kev ua haujlwm nrog kev ua haujlwm ib puag ncig thiab huab cua sov dissipation. Piv txwv li, lub zog tiv taus nrog lub zog ntsuas ntawm 750W yuav raug txo qis rau 500W thaum uas muaj zog ntxiv mus rau 1000W los ntawm huab cua txias (cua ceev 150m / min).
Thaum tus neeg tiv thaiv yuav tsum tau nruab nrog lub tshuab cua sov kom ncav cuag tus nominal rated zog, daim ntawv qhia tshwj xeeb yuav qhia tau lub hwj chim nrog thiab tsis muaj lub tshuab cua sov. Nco ntsoov ua tib zoo mloog cov kev sib txawv no thaum xaiv lub zog tiv thaiv.
(3) Underestimation ntawm qhov tsis pom kev ntawm wirewound resistors
Raws li peb txhua tus paub, qhov teeb meem loj tshaj plaws ntawm wirewound resistors yog muaj kev tsis pom tseeb. Kev tiv thaiv kab hluav taws xob qis-cuam tshuam tau los ntawm txoj kev ntawm cov tsis muaj cua tsis yog-inductive winding, tab sis nws tsis yog tsis kiag li tsis yog-inductive. Cov lus qhia no tuaj yeem tsis quav ntsej hauv kev ncig nrog ib zaus ntawm ob peb puas hertz. Txawm li cas los xij, wirewound resistors tsis siv tau nyob rau hauv high-freatency loads xws li tshaj tawm cov khoom sib txuas lus. Film-Hom phiaj xwm phiaj hluav taws xob tiv taus thiab cov khoom tiv thaiv cericic tuaj yeem muab ob qho tib si muab cov yam ntxwv tsis yog ua rau tsis yog tus yam ntxwv tsis yog qhov ua tsis tau. Lub parasitic inductance ntawm cov resors no tsawg li nh qib. Piv txwv li, txoj cai inductance ntawm lub dav hlau hluav taws xob tiv thaiv tsim los ntawm Kaibu Electronics yog tsawg dua 10NH. Hauv kev siv cov ntawv thov siab thiab ntau ntawm cov tshuaj mem tes, tsis yog tsuas yog cov khoom lag luam uas tsis yog-inductive, tab sis lawv kuj tau muaj lub zog hluav taws xob tsis kam. Lub plug-nyob rau hauv tsis yog-inductive winding cov txheej txheem shidatronic siv tshuab hluav taws xob Technology
(4) Xaiv qhov tseeb
Ntawm no peb tsuas yog tham txog lub zog tiv thaiv rau cov ntawv thov tsis yog qhov tseeb. Thaum xaiv lub zog tiv thaiv, txawm hais tias qhov tseeb tsis yog qhov taw qhia tseem ceeb rau cov ntawv thov feem ntau, qhov raug yog los ntawm tsis muaj kev txiav txim siab txiav txim siab. Peb feem ntau pom zoo rau kev ua raws li qhov tseeb thiab txav chaw ntawm lub neej, thiab tom qab ntawd xaiv qhov tseeb raws li cov ntsiab cai ntawm ntau yam. Lub hauv paus ntsiab lus ntawm qhov tseeb yog tsis tsuas yog pab txo qis rau cov nqi txuag, nws tuaj yeem txhim kho kev ntseeg tau ntawm resistors, tshwj xeeb tshaj yog rau zaj duab xis. Qhov no yog vim tias thiaj li ua tiav qhov tseeb dua, cov txheej txheem ntawm kev hloov kho cov khoom lag luam resistor, thiab txo qhov peev xwm txo lub peev xwm ntawm lub peev xwm ntawm lub resistor. Qee qhov chaw tsim hluav taws xob yuav ua tiav lub hom phiaj ntawm kev hloov kho ntawm cov xaim xaim, uas yuav txo cov peev xwm ntawm lub peev xwm ntawm lub resistor los ntawm tsawg kawg ib nrab. Yog li ntawd, thov ua raws li txoj ntsiab cai ntawm ntau yam thaum xaiv qhov tseeb ntawm cov khoom siv tiv thaiv lub zog. Piv txwv li, thaum qhov tseeb ntawm ± 10% tuaj yeem ua tau raws li qhov yuav tsum tau ua tiav tom qab muaj kev xaiv tau qhov tseeb ± 5% lossis ± 1%.