Resistor: dab tsi yog nws rau? Yuav ua li cas kuv thiaj paub li cas ib tug resistor uas yuav tsum tau?

Thaum tsim hluav taws xob circuits ntiav ntau yam. Ib co ntawm cov feem ntau siv, yam uas yog yog luag tsis yooj yim sua rau ua - nws resistors. Yuav ua li cas yog lawv yog? Yuav ua li cas hom yog muaj? Yuav ua li cas yog lawv cov tseem ceeb tshaj plaws parameter? Thiab yog dab tsi nta muaj nyob rau hauv series thiab thaum uas tig mus kev twb kev txuas?

Yuav ua li cas yog tsis kam?

Yog li ntawd hu ua passive caij Circuit Court, uas muab kuj mus tam sim no thaum lub sij hawm nws khiav. Nyob rau hauv loj schemes yog siv ntau feem ntau tshaj li lwm yam electronic caij. Nws yog ib qho tseem ceeb los xyuas kom meej transistor kev tsis ncaj ncees hom thaum siv nyob rau hauv lub amplifier theem. Tab sis qhov tseem ceeb tshaj zog ntawm kev lees paub tswj thiab kev cai ntawm voltage thiab ntxhee nyob rau hauv hluav taws xob circuits. Peb yuav tom qab xav txog dab tsi lawv hom yog. Raws li ib feem ntawm qhov tsab xov xwm no yuav qhia txog 5 ntsiab, uas yog feem ntau siv, tab sis muaj tej zaum yuav lwm leej lwm tus. Thaum peb xam cov resistors, ces nco ntsoov mus ntsuam xyuas li cas hwj chim uas yuav tsum tau.

Koj puas xav kom to taub dab tsi yog yuav tsum tau nyob rau hauv ib tug cov ntaub ntawv?

Yuav ua li cas kuv thiaj paub li cas ib tug resistor uas yuav tsum tau thaum tsim schemes? Chiv, nws yuav tsum tau to taub hais tias yuav tsum tau paub yog tam sim no, los yog tus nqi ntawm cov load kuj. Raws li ib feem ntawm lub ob qho kev xaiv muaj kev cuam tshuam tus yam ntxwv ntawm lub Circuit Court tsab xov xwm yuav muab suav hais tias:

1) Yog hais tias koj tsis paub dab tsi, ces peb coj ib tug nce mus nce los resistor thiab txuas nws nyob rau hauv series nrog lub load. Tig lub pob qhov rooj mus txog rau thaum lub caij thaum peb yuav tsis muaj qhov tseeb voltage. Tam sim no, es tsis txhob ntawm nce mus nce los kuj txuas qhov nrog yuav tsum tau tsis. Ntsuas lub tam sim no uas los tom qab lub resistor thiab multiplies lub resultant nqi nrog lub voltage uas yog muaj ntaub ntawv. Tom qab ntawd peb yuav paub yuav ua li cas thiab rau qhov twg thov kev pab.

2) Nws yog tsim nyog los paub yav tas los teev tam sim no tus nqi thiab lub load. Yuav kom nce lub xam cov neeg, thiab nws tseem yog ntshaw kom paub tus nqi ntawm cov internal kuj lub hwj huam mov.

Wb simulate ib tug me ntsis txawv txiav txim tej yam kev mob. Muaj yog ib tug resistor raws li ib tug load, Ohm txoj cai, thiab yuav tsum tau mus xam yuav tsum tau kuj ntawm lub Circuit Court. Nws yog ib heev ib qho kev nthuav taw tes, thiab nws tsim nyog yuav tsum tau them cov xim rau nws. Yog vim li cas qhov no hais raug xaiv? Qhov tseeb yog hais tias cov neeg uas cia li pib mus koom nyob rau hauv cov creation ntawm schemes, heev feem ntau hais lo lus nug no. Tab sis, alas, txoj kab ntawm kev xav, uas lawv muaj, yog ib tug me ntsis tsis ncaj ncees lawm. Xam qhov yuav tsum tau tus nqi nrog rau ib tug Ohm txoj cai tsis ua hauj lwm ntawm no. Nws yog tsim nyog los ntxiv siv ntxiv resistor xam mis: RRT = CH (NPC-HH) / NN = CH (x-1). Cia peb kawm cov mis:

RRT - ntxiv resistor kuj;

NPC - mov voltage;

CH - load kuj;

X = NPC / NN;

LV - voltage uas yog tsim nyog tau txais cov load.

Peb siv cov mis. Xav hais tias cov kuj nyob rau hauv ohms RRT 1 yuav 0.6 ohms. Yog hais tias peb muab tso rau ib tug 5 ohm, thaum kawg yuav tsum tau 3.3 ohms. Yog vim li cas tag nrho cov no? Qhov no yog vim lub fact tias lub me qhov Performance index yog lub load kuj, cov tam sim no muaj cov yam ntxwv ntawm lub Circuit Court. Qhov no yuav squander lub hwj huam mov, vim hais tias nws kuj tsim tej yam cuam tshuam nrog rau cov zaj uas tam sim no. Thiab muab hais tias qhov no yuav txo tau cov voltage, nws hloov tawm hais tias peb yuav tsum tau ib tug series resistor nrog tus me nta los ua tus yam voltage. Qhov no voltage yog cia "rau tus ntiv tes". Nws yuav tsis yooj yim rau to taub dab tsi thiab yuav ua li cas, tab sis koj sim.

taag resistor

Yog li ntawd hu ua pab kiag li lawm uas yog tuav tseg qhov kuj muaj nqis. Qhov no cov yam ntxwv ntawm lub resistor tsis hloov nyob rau hauv tus ntawm lwm yam (kub, tam sim no khiav, lub teeb, thov voltage) nyob rau hauv tsim nyog txwv. Yog hais tias yog li nrhiav tau tawm txog tag nrho cov neeg hais yuav tau hais tias lawv muaj internal suab nrov thiab tsis khov vim peb-tog cawv. Tab sis feem ntau nws yog tag nrho ces tsis tseem ceeb txaus uas tsis quav ntsej tus pib xyaum ua xov tooj cua electronics, thiab nws yuav ua rau kev txiav txim zoo tsuas yog thaum koj tsim tiag tiag complex systems, uas yog tsis txawm lub fact tias qhov chaw tam sim no yuav mus.

nce mus nce los resistor

Yog li ntawd hu ua pab kiag li lawm uas nws tsis kam nqi yuav raug hloov siv ib tug tshwj xeeb cwj mem (tej zaum nws yuav tsum yog ib tug slider, ib tug khawm los yog teb yam). Vim li cas koj xav tau no hom ntawm resistor? Ib tug piv txwv zoo ntawm txoj kev siv ntawm no lub caij no yog ib lub ntim tswj rau hais lus computer los yog xov tooj txawb.

li-ua resistor

Nws yog hais txog ib tug ntaus ntawv khiav hauj lwm hom uas tsuas hloov puav. Yuav kom kho cov kuj nqi, nws yog tsim nyog los ntswj lub ntswj ntsia hlau qhov, uas muaj ib tug resistor. Yuav ua li cas yog nws rau? Dav faib lawv tau txais nyob rau PCB ntawm lub xov tooj cua raws li ib tug divider tam sim no los yog voltage.

photoresistor

Cov no yog cov tshwj xeeb pab kiag li lawm uas yuav hloov nws kuj muaj nqis nyob rau hauv tus ntawm lub teeb. Photoresistors no yog ua los ntawm semiconductor cov ntaub ntawv. Yog hais tias koj xav mus li cas rau lub xub ntiag ntawm pom qhov kaj yeej siv selenide thiab cadmium sulfide. Rau npe infrared tawg siv germanium.

thermistor

Qhov no tshwj xeeb apparatus, los ntawm cov uas mus ntsuas qhov kub ntawm cov sab nraud ib puag ncig. Lub thermistor kuj yog siv nyob rau hauv lub thermal stabilization circuits rau cov transistor theem. Raws li koj yuav twb twv, cov kuj tej zaum yuav hloov nyob rau hauv tus ntawm kub. Nyob rau hauv hatcheries rau qaib, greenhouses, muaj li - nyob qhov twg koj yuav nrhiav tau qhov no resistor. Yuav ua li cas yog nws rau? Qhov ntawd rau ib tug tej yam kub txwv muaj cua sov \ txias.

dissipated hwj chim

Qhov no absorbed zog yog ib tug resistor uas yog tsim nyob rau tam sim no thiab voltage. Vim lub fact tias nws tshwm sim dissipation, tsis txuag, thiab tus ntaus ntawv yog hu ua passive. Vim li no cov peb yuav tham txog lub resistor li ib tug active caij, uas Attendance yuav ua hauj lwm nyob rau hauv AC circuits thiab DC currents.

Los hwj chim dissipation

Yuav ua li cas koj puas paub tias yuav ua ib tug tas resistor? Ua li no, koj yuav tsum tau saib nws daim ntawv lo:

1. Thaum muaj ob oblique kab, lub hwj chim dissipation yog 0,125 watts.
2. Muaj yog ib tug oblique kab - hwj chim dissipation yog sib npaug zos rau 0.25 watts.
3. Ib tug kab rov tav kab - hwj chim dissipation ntawm 0.5 watts.
4. Ib txoj kab ntsug - hwj chim dissipation 1W.
5. Ob ntsug kab - hwj chim dissipation 2 watts.
6. Ob tug oblique kab uas tsim lub Latin tsab ntawv V, - hwj chim dissipation yog 5 Watts.

Pib los ntawm ib tug watt, rau qhov los siv Roman numerals.

series kev twb kev txuas

Thaum nws ua rau kev nkag siab rau siv no mus kom ze? Yog hais tias koj xav tau kom tau ib tug txiav txim tsis kam, tab sis muaj ib tug resistor nrog ib tug tsawg nominal tus nqi, ces siv lub serial kev twb kev txuas. Yuav kom ntsuam xyuas yuav ua li cas thiab dab tsi yog ua nyob rau hauv lub tswvyim, nws yog tsim nyog los zaum pem lawv cov yam ntxwv.

thaum uas tig mus kev twb kev txuas

Qhov twg tsim nyog, no mus kom ze? Ntawm no, tag nrho cov kuj ntawm lub resistor yog sib npaug zos rau cov zaum, uas yog inversely xwm yeem mus rau nws. Qhov no tus nqi yog tseem xa mus rau raws li "conductivity". Tej zaum koj yuav ua tau ib tug me ntsis yooj yim to taub dab tsi tus neeg sau ua nws, li ntawd, peb muaj ib tug saib rau nram qab no mis (C - Kuj):

1 / P _{tag nrho} = 1 / P ₁ + 1 / C ₂ + ... + 1 / C _x.

daim ntawv thov

Yog li ntawd peb pom tau hais tias xws li ib tug resistor, rau nws yog dab tsi. Duab muab tso rau hauv no tsab xov xwm to taub yuav ua li cas nws zoo nkaus li. Tab sis peb xav kom mloog lus thiab siv thereof. Yog li, resistor. Yuav ua li cas nws yog nyob rau hauv lub tsheb? Raws li koj paub, lub tsheb siv ib tug tseem ceeb npaum li cas ntawm electronics. Ntawm no yog los tswj nws lub lag luam thiab nws cov kev siv. Vim li cas koj xav tau ib tug resistor qhov cub nyob rau hauv lub tsheb? Peb pom ib lub sij hawm los mus hloov lub chaw thiab kub tswj? Uas yog vim li cas muaj yog ib tug tsis kam rhaub! Tom qab tag nrho, tsis muaj nws yuav tsum muaj xwb pre-ntsia tej chaw thiab txhua yam. Tam sim no, xav txog vim li cas koj xav tau ib tug resistor rau LED? Nrog nws koj yuav tau kho cov brightness ntawm nws ci ntsa iab. Raws li tej zaum koj yuav twv, yog koj ua tib zoo nyeem tsab xov xwm, cov lus teb rau lo lus nug zoo li cas ntawm resistors yog yuav tsum tau rau LED - nce mus nce los!

xaus

Raws li koj tau pom, ib tug resistor - nws yog ib tug tsim nyog thiab pab tau tshaj plaws, uas muaj ib tug ntau ntawm cov ntaub ntawv sau npe. Nyob rau hauv kev tshawb xav, koj yuav ua li cas tsis muaj tus resistor nyob rau hauv ib tug yooj yim Circuit Court rau ib tug ob peb ntawm cov ntsiab lus, txawm lub fact tias lub zog yuav tsum heev kom raug xaiv. Tab sis qhov no yog tsis zoo li, thiab mus cuag tej yam tseem ceeb ntawm cov tsis yuav muaj ib tug ntev lub sij hawm yuav tsum khaws cia. Qhov ntawd yog mus piv rau tus txheej txheem thiab resistors siv, vim hais tias lawv tso cai rau cov tseem ceeb kev kawm sib txawv, qhib tau txawm ntau ntawm lawv cov kev hloov.