Koj tau tua ib qho Khoom Siv Hauv Xeev (SSR), tab sis koj lub multimeter tseem qhia tau qhov tseem ceeb ntawm qhov tso zis tawm. Qhov no yog qhov tshwm sim thiab tsis meej pem. Nws tuaj yeem ceeb heev. Tej zaum koj yuav xav tias: SSR puas tau ua tsis tiav hauv lub xeev kaw?
Qhov no yog qhov kev txhawj xeeb siv tau. Tab sis feem ntau nws tsis yog ib qho kev qhia ntawm faulty relay. Hloov chaw, nws yog qhov ua tau zoo ntawm qhov ua tau zoo li cas - xeev relays ua haujlwm los ntawm kev tsim. Qhov voltage koj ntsuas yog tiag tiag. Txawm li cas los xij, feem ntau nws tsis tuaj yeem muab tam sim no txaus rau cov khoom siv feem ntau. Yog vim li cas peb hu nws "phantom voltage."
Qhov no tshwm sim vim li cas semiconductor keyboards ua haujlwm thiab kev tiv thaiv circuits ua rau lawv. Nkag siab qhov twg qhov hluav taws xob no los ntawm yog qhov tseem ceeb. Nws pab nrog kev saib xyuas zoo thiab ua kom ntseeg tau kev ua haujlwm ntawm cov khoom siv hluav taws xob qis qis.
Kab lus no yuav muab rau koj ua tiav engineering piav qhia. Koj yuav kawm:
Yuav ua li cas SSRs txawv ntawm ib txwm siv tshuab relays
Qhov chaw tiag tiag ntawm off- xeev voltage: inherent to tam sim no thiab sab hauv RC snubber circuit
Kev nyab xeeb txaus ntshai thiab teeb meem kev ua haujlwm no "phantom voltage" tuaj yeem ua rau
Ib kauj ruam -los ntawm- cov lus qhia kauj ruam rau kev suav thiab txhim kho lub bleeder resistor kom tshem tawm qhov hluav taws xob seem tag nrho
Qhov txawv ntawm Core
Yuav kom nkag siab tias yog vim li cas ib qho hluav taws xob SSR "leak" thaum tawm, peb yuav tsum tau muab piv nrog cov khoom siv hluav taws xob ua ntej. Lawv txoj kev hloov pauv yog txawv kiag li.
Ib qho SSR tsis yog ib qho zoo dua mechanical relay. Nws yog qhov sib txawv kiag li thev naus laus zis nrog nws tus kheej tus cwj pwm, qhov zoo, thiab qhov tsis zoo. Lub tswv yim ntawm lub xeev "tawm" qhia qhov sib txawv no kom meej meej.
Qhov "Air Gap"
Ib qho electromechanical relay (EMR) siv lub kauj los tsim ib qho chaw sib nqus. Qhov no lub cev txav ib qho kev sib cuag hlau los qhib lossis kaw lub voj voog. Thaum lub relay raug kaw, cov neeg sib cuag yog lub cev sib cais los ntawm qhov deb me me.
Qhov kev sib cais ntawm lub cev no tsim ib qho "air gap." Cua yog ib qho zoo heev insulator. Nws muab ze rau - hluav taws xob tsis kawg. Qhov sib txawv no ua kom muaj tseeb thiab ua tiav Circuit Court disconnection, tso cai rau zero tam sim no dhau mus.
Qhov "Semiconductor Junction"
Ib Lub Xeev Relay tsis muaj qhov txav txav. Nws hloov cov load siv cov khoom siv semiconductor. Feem ntau, cov no yog ib khub ntawm SCRs (Silicon-Controlled Rectifiers) lossis TRIAC (Triode for Alternating Current).
Thaum SSR yog "tawm," cov khoom siv hluav taws xob no nkag mus rau hauv lub xeev uas tsis yog{0}} coj. Tab sis lawv tsis yog qhov sib txawv ntawm huab cua. Lawv tseem yog ib qho khoom siv ntawm silicon txuas rau cov tswv yim thiab cov zis terminals. Cov khoom txuas ntxiv no, txawm tias "tawm," muaj cov khoom siv hluav taws xob. Cov no tiv thaiv nws los ntawm kev ua tiav qhov ze - tsis muaj qhov tsis taus ntawm qhov sib txawv ntawm lub cev.
|
Feature |
Electromechanical Relay (EMR) |
Solid State Relay (SSR) |
|
Hloov Mechanism |
Kev sib cuag ntawm lub cev |
Cov khoom siv semiconductor (TRIAC / SCR) |
|
Tawm -Txoj Kev Txuas Hauv Xeev |
Lub cev huab cua sib txawv; kev txiav txim tseeb |
Semiconductor kev sib tshuam; tsis yog -kev ua haujlwm |
|
Kuj (Tawm) |
Ze ntawm -infinite (Gigaohms lossis siab dua) |
Siab, tab sis finite (Megaohms) |
|
Leakage Tam sim no |
Zoo xoom (picoamperes) |
Me me tab sis ntsuas tau (microamperes rau milliamperes) |
|
Arcing |
Yog; kev sib cuag tuaj yeem arc thiab hnav tawm |
Tsis muaj; tsis muaj qhov txav mus rau arc lossis hnav |
Cov lus no qhia tau meej meej tias lub xeev "tawm" ntawm SSR yog qhov tseem ceeb ntawm -kev tawm tsam, tsis yog tag nrho kev cuam tshuam. Qhov no yog lub hauv paus rau kev nkag siab qhov twg qhov hluav taws xob seem los ntawm.
Ob tug neeg txhaum
Qhov tawm -lub xeev qhov hluav taws xob koj ntsuas tau los ntawm qhov tam sim no me me dhau los ntawm SSR. Qhov tam sim no yog los ntawm ob qhov chaw sib txawv nyob rau hauv lub relay tus tsim.
Ob leeg pab txhawb, tab sis ib qho yog feem ntau tseem ceeb dua li lwm qhov, tshwj xeeb tshaj yog hauv AC daim ntawv thov.
Ua rau #1: Inherent Semiconductor Leakage
Tag nrho cov khoom siv hluav taws xob semiconductor muaj tus yam ntxwv hu ua tawm - lub xeev xau tam sim no. Qhov no suav nrog diodes, transistors, SCRs, thiab TRIACs. Nws yog ib qho me me ntawm tam sim no uas ntws los ntawm lub cuab yeej txawm tias nws nyob hauv nws tsis yog - ua lossis "tawm" lub xeev.
Qhov kev xau no yog cov cuab yeej tseem ceeb ntawm semiconductor physics. Nws tau teev nyob rau hauv daim ntawv teev cov khoom. Rau feem ntau ntawm SSRs, qhov kev nkag mus hauv qhov no me me, feem ntau nyob rau hauv microampere (µA) ntau. Thaum nws pab txhawb rau tag nrho cov txiaj ntsig, nws tsis tshua muaj qhov tseem ceeb ntawm kev nyeem cov hluav taws xob siab uas ua rau tsis meej pem.
Ua rau #2: RC Snubber Circuit Court
Qhov laj thawj tseem ceeb ntawm kev tawm - lub xeev qhov hluav taws xob hauv feem ntau AC SSRs yog qhov kev tiv thaiv sab hauv hu ua RC snubber. Qhov Circuit Court no yog qhov tseem ceeb rau kev ua kom muaj sia nyob, tab sis nws muaj qhov cuam tshuam loj heev.
Lub snubber circuit muaj ib tug resistor (R) thiab ib tug capacitor (C) txuas nyob rau hauv series. Qhov R-C network no tau muab tso rau hauv qhov sib npaug ntawm SSR cov khoom siv hluav taws xob. Nws lub hom phiaj yog los tiv thaiv SSR cov khoom siv hluav taws xob tso tawm (TRIAC lossis SCRs) los ntawm kev puas tsuaj. Qhov kev puas tsuaj no los ntawm kev hloov pauv sai, hu ua dv/dt cov xwm txheej siab. Cov xwm txheej no tshwm sim thaum hloov cov khoom inductive xws li motors lossis solenoids.
Qhov tseem ceeb, qhov kev tiv thaiv Circuit Court no tsim ib txoj hauv kev rau tam sim no. Lub capacitor, los ntawm nws qhov xwm txheej, yuav dhau ib qho me me ntawm kev hloov pauv tam sim no (AC) thaum thaiv tam sim no (DC).
Txawm tias thaum lub SSR lub ntsiab hloov lub ntsiab yog tawm, RC snubber tseem txuas nrog hla txoj kab thiab thauj khoom terminals. Hauv AC Circuit Court, lub capacitor hauv snubber muab txoj hauv kev txuas mus ntxiv. Ib qho me me AC tam sim no ntws los ntawm SSR. Qhov tam sim no yog qhov peb hu ua SSR leakage tam sim no.
Qhov dej xau tam sim no, ntws los ntawm snubber circuit, dhau los ntawm koj lub nra. Yog hais tias lub load muaj impedance siab (los yog yog tias koj ntsuas nrog lub siab -impedance multimeter uas tsis muaj load txuas), qhov me me tam sim no tsim ib qho tseem ceeb voltage poob. Qhov no yog lub xeev khoom relay phantom voltage koj ntsuas.
Phantom vs. Real Voltage
Lub sij hawm "phantom voltage" tuaj yeem nkag siab. Lub peev xwm voltage yog tiag tiag. Tab sis nws feem ntau txhawb nqa los ntawm qhov tam sim no me me uas nws tsis tuaj yeem ua haujlwm tau zoo. Cov cuab yeej koj siv rau kev ntsuas thiab qhov xwm txheej ntawm koj cov khoom hluav taws xob txiav txim siab seb qhov voltage no puas yog qhov teeb meem lossis tsuas yog xav paub.
Siab vs. Tsawg impedance
Lub tswv yim tseem ceeb ntawm no yog impedance. Lub siab -impedance Circuit Court muaj kev tawm tsam zoo rau cov dej ntws tam sim no. Tsawg-impedance Circuit Court muab txoj hauv kev yooj yim.
Niaj hnub nimno digital multimeter (DMM) yog qhov ntsuas siab -impedance. Nws feem ntau muaj qhov input impedance ntawm 10 Megaohms (10,000,000 Ω) lossis ntau dua. Nws tau tsim txoj hauv kev no kom tsis txhob kos qhov tseem ceeb tam sim no los ntawm Circuit Court nws ntsuas. Qhov no xyuas kom meej qhov kev nyeem ntawv voltage.
Hloov pauv, qhov qis -impedance load, zoo li lub cav winding lossis incandescent teeb, tej zaum yuav muaj qhov impedance ntawm ob peb puas ohms.
Thaum cov hluav taws xob me me los ntawm SSR's snubber ntsib koj DMM's impedance siab heev, nws tsis tuaj yeem ntws tau yooj yim. Qhov no "siab" tsim, thiab lub meter nyeem high voltage. Txawm li cas los xij, thaum tib qhov me me tam sim no ntsib qhov qis - impedance load, nws ntws yooj yim los ntawm kev thauj mus rau nruab nrab. Qhov voltage hla lub load poob rau zero. Lub load tseem ceeb "absorbs" los yog shunts cov xau tam sim no.
Vim li cas koj DMM pom qhov hluav taws xob
Koj DMM yog lub cuab yeej zoo tshaj plaws los txheeb xyuas qhov tshwm sim no. Vim tias nws rub yuav luag tsis muaj tam sim no, nws tso cai rau tag nrho qhov hluav taws xob muaj peev xwm tsim los ntawm cov xau tam sim no los tsim thoob plaws nws cov tswv yim terminals.
Qhov no piav qhia vim li cas koj tuaj yeem ntsuas 85VAC hla qhov tso zis ntawm "tawm" SSR nrog koj lub ntsuas. Tab sis thaum koj txuas lub teeb me me, lub teeb tsis tig thiab ntsuas qhov ntsuas hluav taws xob poob rau zero. Qhov qis impedance ntawm lub teeb muab ib txoj hauv kev rau cov xau tam sim no. Qhov no tiv thaiv qhov voltage ntawm kev tsim.
Tiag tiag -Kev tshwm sim hauv ntiaj teb
Txawm hais tias feem ntau tsis muaj teeb meem, tsis quav ntsej qhov seem ntawm qhov hluav taws xob no tuaj yeem ua rau muaj kev nyab xeeb tseem ceeb, cov khoom siv tsis zoo, thiab cov sij hawm siv sij hawm los daws teeb meem.
Kev nkag siab txog qhov yuav tshwm sim yog qhov tseem ceeb rau txhua tus kws tshaj lij lossis cov kws tshaj lij ua haujlwm nrog cov kev tswj hwm hauv xeev -.
Txoj Kev Nyab Xeeb Tseem Ceeb
Qhov no yog qhov kev txiav txim siab tseem ceeb tshaj plaws. Lub xub ntiag ntawm qhov seem hluav taws xob ua rau muaj kev phom sij txaus ntshai ntawm lub de-energized circuit. Qhov no tuaj yeem kov yeej Lockout / Tagout (LOTO) cov txheej txheem kev nyab xeeb.
Xav txog ib tus kws kho mob ua haujlwm nrog kev pabcuam lub tshuab twj tso kua mis tswj los ntawm SSR. Ua raws li cov txheej txheem, lawv muaj qhov kev tswj hwm tig lub SSR "tawm." Raws li kev kuaj xyuas kev nyab xeeb zaum kawg, lawv siv lawv qhov siab -DMM zoo los txheeb xyuas xoom lub zog ntawm lub tshuab hluav taws xob. Lawv ntsuas 90VAC.
Qhov no tsim ib qho teeb meem ntawm kev tsis meej pem. Tus kws tshaj lij yuav xav tias SSR tau ua tsis tiav thiab tseem nyob. Tej zaum lawv yuav nkim sij hawm los daws qhov teeb meem ntawm relay los yog tswj cov xov hlau.
Qhov phem tshaj, tus kws tshaj lij tsis paub txog yuav tso qhov kev nyeem ntawv li "tsuas yog phantom voltage" thiab txuas ntxiv mus ua haujlwm. Thaum cov dej ntws tawm nws tus kheej me me (feem ntau 5-20 mA), nws tsis yog qhov tam sim no uas yog thawj qhov kev poob siab. Qhov phom sij yog qhov muaj peev xwm voltage. Kov cov terminals tseem tuaj yeem ua rau mob thiab pib hluav taws xob poob siab. Qhov no tuaj yeem ua rau muaj kev raug mob thib ob los ntawm kev ntog lossis kev ua haujlwm rov qab.
Teeb meem kev ua haujlwm tsis zoo
Tshaj li qhov kev pheej hmoo ntawm kev nyab xeeb, cov dej ntws tam sim no tuaj yeem ua rau kev ua haujlwm tsis zoo. Qhov no muaj tseeb tshwj xeeb nrog cov khoom siv hluav taws xob niaj hnub, qis - fais fab tuag.
Ib qho teeb meem tshwm sim heev yog qhov ci ntsa iab lossis flickering ntawm LED ntsuas lossis teeb. Qhov me me tam sim no, thaum tsis txaus rau lub hwj chim ntawm lub teeb ci, feem ntau tsuas yog txaus rau ib nrab rau pem hauv ntej -kev tsis ncaj ncees ntawm LEDs. Qhov no ua rau lawv ci ntsa iab txawm tias thaum lawv yuav tsum tawm.
Ib yam li ntawd, rhiab logic inputs tuaj yeem cuam tshuam. Piv txwv suav nrog cov ntawm PLC lossis lwm tus tswj hwm. Cov inputs no siab -impedance los ntawm kev tsim. Qhov seem hluav taws xob los ntawm SSR qhov xau tuaj yeem siab txaus los hla lub logic- siab pib. Qhov no ua rau tus maub los tsis raug sau npe "ON" teeb liab los ntawm lub sensor uas yuav tsum tau tawm.
Daim Ntawv Sib Piv Risk
Qhov kev pheej hmoo tshwm sim los ntawm qhov seem hluav taws xob nyob ntawm qhov hnyav ntawm cov khoom txuas nrog SSR.
|
Load Hom |
Piv txwv |
Associated Risk |
|
Siab impedance Load |
PLC Digital Input, VFD Qhib |
Siab:False triggering, incorrect logic state. |
|
Tsawg zog Load |
LED Indicator Vaj Huam Sib Luag, Me Me Pilot Teeb |
Nruab nrab:Dim glowing, flickering, perceived li "tawm." |
|
Siab zog Resistive Load |
Cov Cuab Yeej Loj Loj |
Tsawg (ua haujlwm):Qhov cuam tshuam tsawg kawg thaum ua haujlwm. |
|
Inductive Load |
Lub cev muaj zog, Contactor Coil, Solenoid |
Siab (Kev tu):Qhov teeb meem cuam tshuam loj heev thaum ua haujlwm. |
Kev daws teeb meem
Qhov teeb meem ntawm qhov hluav taws xob seem yog qhov zoo - nkag siab. Txoj kev daws teeb meem yog ncaj nraim, txhim khu kev qha, thiab ua raws li cov hauv paus ntsiab lus hluav taws xob. Txoj kev kho yuav ntxiv ib qho kev tivthaiv rau koj lub voj voog.
Qhov kev daws teeb meem no yog siv cov tshuaj tiv thaiv ntshav rau SSR daim ntawv thov. Nws kuj tseem hu ua dummy load lossis parallel load resistor.
Bleeder Resistor yog dab tsi?
Ib tug bleeder resistor yog ib tug resistor tso nyob rau hauv parallel nrog koj load. Nws lub hom phiaj yog los muab kev hloov pauv, qis - txoj kev tawm tsam rau SSR cov dej ntws tawm kom ntws mus rau nruab nrab.
Los ntawm kev muab txoj kev yooj yim no, tus resistor "los ntshav tawm" cov dej ntws tam sim no. Qhov no tiv thaiv qhov hluav taws xob los ntawm kev txhim kho thoob plaws qhov siab -impedance load lossis koj lub multimeter's terminals. Tam sim no cov dej xau tam sim no ntws los ntawm cov hlab ntsha resistor es tsis txhob ua rau lub zog nce.
Thaum raug qhov loj me, qhov resistor no yuav muaj kev tiv thaiv tsawg txaus kom ua tau zoo shunt lub to tam sim no. Tab sis nws yog qhov siab txaus kom tsis txhob kos lub zog ntau dhau thaum SSR nyob rau.
Xam cov Bleeder Resistor
Xaiv qhov tseeb los ntshav resistor tsis yog kwv yees. Nws yog ob - feem xam. Koj yuav tsum txiav txim siab nws qhov tsis kam (hauv Ohms) los ntshav qhov hluav taws xob thiab nws qhov ntsuas hluav taws xob (hauv Watts) kom ntseeg tau tias nws tsis kub dhau thiab ua tsis tiav.
Ua tib zoo ua raws li cov kauj ruam no.
Kauj Ruam 1: Txiav txim siab qhov System Voltage (V) thiab Leakage Tam Sim No (I_leakage).
Koj qhov system voltage paub (piv txwv li, 120VAC, 240VAC). SSR qhov siab tshaj plaws tawm - lub xeev xau tam sim no tuaj yeem pom hauv nws cov ntaub ntawv. Yog tias tsis muaj, tus nqi raug rau ntau AC SSRs yog nruab nrab ntawm 5mA thiab 20mA. Rau qhov kev suav no, peb yuav siv tus nqi qis ntawm 15mA (0.015A).
Kauj Ruam 2: Xaiv Lub Hom Phiaj Residual Voltage (V_residual).
Txiav txim siab seb qib twg tawm - lub xeev qhov hluav taws xob tau txais. Rau feem ntau cov logic digital thiab tiv thaiv kev poob siab, tus nqi qis dua 10V yog lub hom phiaj nyab xeeb. Peb yuav siv V_residual=10V.
Kauj Ruam 3: Muab xam qhov Yuav Tsum Tau Ua (R).
Siv Ohm Txoj Cai. Qhov kev tiv thaiv yuav tsum tsis tshua muaj txaus kom poob qhov voltage mus rau koj lub hom phiaj qib muab cov xau tam sim no.
Formula:R=V_residual / I_leakage
Piv txwv:R=10V / 0.015A=667Ω. Ib qho piv txwv tus nqi resistor nyob ze qhov no yog 680Ω. Rau feem ntau daim ntawv thov, tus nqi siab dua li 10kΩ lossis 15kΩ kuj ua haujlwm zoo thiab muaj txiaj ntsig ntawm dissipating tsawg zog. Wb rov- soj ntsuam nrog ib qho kev xaiv, 15kΩ (15,000Ω). Qhov seem voltage yuav yog V=I * R=0.015A * 15000Ω=225V. Qhov no siab dhau lawm. Qhov no qhia tau tias yuav tsum muaj kev tiv thaiv qis dua. Wb sim 2.2kΩ (2,200Ω). V=0.015A * 2200Ω=33V. Tseem me ntsis siab. Kev suav thawj zaug 680Ω yog qhov tsim nyog dua.
Kauj Ruam 4: Xam cov Fais Fab Dissipation (P).
Qhov no yog ib kauj ruam tseem ceeb ntawm kev nyab xeeb. Lub resistor yuav dissipate lub zog raws li cua sov thaum twg SSR yog ON, raws li nws tau txuas ncaj qha hla cov kab hluav taws xob. Koj yuav tsum xam lub hwj chim no los xaiv tus resistor uas yuav tsis hlawv.
Formula:P=V² / R (qhov twg V yog tag nrho qhov system voltage)
Piv txwv (siv peb suav 680Ω ntawm 120VAC system):P=(120V)² / 680Ω=14400 / 680=21.2W. Qhov no yog lub zog loj heev dissipation thiab yuav xav tau ib tug loj, kim zog resistor. Qhov no qhia peb peb qhov kev xav thawj zaug xav tau kev hloov kho.
Cia peb rov xav dua. Lub hom phiaj yog kom shunt lub to tam sim no. Ib qho kev coj ua hauv kev lag luam yog siv cov resistor nyob ib ncig ntawm 15kΩ nrog 0.1μF capacitor hauv series. Txawm li cas los xij, kev daws teeb meem yooj yim tsuas yog tus resistor xwb. Qhov teeb meem nyob rau hauv kev xam saum toj no yog xav tias qhov phem tshaj - kis to. Cia peb siv cov dej ntws ntau dua ntawm 8mA (0.008A) thiab saib seb tus qauv 15kΩ resistor ua li cas.
V_residual=0.008A * 15000Ω=120V. Tseem siab dhau lawm.
Cia peb rov pib qhov kev suav nrog lub hom phiaj meej dua. Peb xav tau ib txoj kev uas yog qhov qis impedance tshaj lub 'meter', tab sis tsis hlawv. Cia peb xaiv tus qauv resistor tus nqi thiab xam los ntawm qhov ntawd. Ib qho kev xaiv yog 2.5kΩ txog 5kΩ resistor.
Cia peb xaiv R=3kΩ (3,000Ω).
Recalculate V_residual (xav tias 15mA to):V=0.015A * 3000Ω=45V. Zoo dua, tab sis tseem yuav siab dhau rau qee qhov PLCs.
Recalculate Fais Fab Dissipation ntawm 120VAC: P = (120V)² / 3000Ω = 14400 / 3000 = 4.8W.
Kauj Ruam 5: Xaiv qhov Resistor's Power Rating.
Koj yuav tsum siv lub resistor nrog lub zog ntsuas siab dua li qhov koj suav cov dissipation kom muaj kev nyab xeeb thiab siv tau ntev. Ib qho kev nyab xeeb yam tsawg kawg yog 2x yog qhov yuav tsum tau ua . 3x rau 5x yog qhov zoo dua.
Piv txwv:Rau peb 4.8W xam, 5W resistor tsis txaus. Ib qho 10W resistor yuav yog qhov tsawg kawg nkaus (2x yam). Tab sis 20W lossis 25W chassis-mount resistor yuav yog qhov kev xaiv muaj kev nyab xeeb thiab ntseeg tau ntau dua, vim nws yuav khiav txias dua.
Kev teeb tsa thiab kev nyab xeeb
Ib txwm txiav thiab kaw tag nrho cov khoom siv hluav taws xob ua ntej ua ib qho kev teeb tsa lossis hloov kho rau hauv Circuit Court.
Mount lub bleeder resistor rau ntawm lub chassis hlau los yog nyob rau hauv ib qho chaw uas txaus airflow. Nws yog tsim los kom sov lossis kub thaum ua haujlwm. Tsis txhob muab kaw rau hauv ib lub thawv me me, tsis muaj qhov cua.
Xyuas kom tus resistor tus kheej qhov ntsuas voltage (tsis yog rau txhua hom, tab sis tseem ceeb rau qee qhov) txaus rau qhov system voltage.
Siv cov xaim me me uas tsim nyog thiab muaj kev sib txuas tag nrho. Xyuas kom meej tias tsis muaj cov hlau lead tsis tuaj yeem cuam tshuam nrog lwm cov khoom lossis cov neeg ua haujlwm.
Xaus
Qhov seem hluav taws xob ntsuas ntawm qhov tso zis ntawm "tawm" Khoom Lub Xeev Relay tsis yog qhov cim ntawm qhov tsis ua haujlwm. Nws yog ib qho kev kwv yees thiab cov yam ntxwv ib txwm muaj hauv paus hauv SSR's semiconductor tsim. Nws yog tshwm sim los ntawm kev sib xyaw ua ke ntawm cov dej ntws tawm thiab, qhov tseem ceeb tshaj, sab hauv RC snubber circuit.
Thaum qhov hluav taws xob phantom no yog ib qho hluav taws xob zoo nkauj, nws lub peev xwm los tsim kev nyab xeeb kev nyab xeeb thaum tu thiab ua rau muaj teeb meem kev ua haujlwm nrog cov khoom siv hluav taws xob tsis zoo yuav tsis quav ntsej. Nws sawv cev qhov sib txawv tseem ceeb ntawm semiconductor thiab mechanical switches uas txhua tus engineers thiab cov kws tshaj lij yuav tsum hwm.
Los ntawm kev nkag siab tias qhov hluav taws xob no yog qhov tseeb tab sis tam sim no - txwv, thiab los ntawm kev paub yuav ua li cas kom raug xam thiab nruab ib qho yooj yim los ntshav resistor, koj tuaj yeem paub tus cwj pwm no. Tam sim no koj tuaj yeem ntseeg siab tsim, daws teeb meem, thiab tswj cov tshuab uas tsis yog tsuas yog txhim khu kev qha tab sis, qhov tseem ceeb tshaj plaws, muaj kev nyab xeeb dua rau txhua tus neeg ua haujlwm ntawm lawv.
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