Kev taw qhia yooj yim thiab kev tshuaj xyuas kev sib cuag ntawm high voltage DC relay

Nrog rau lub ntiaj teb ua kom sov thiab ua kom nruj zog, kev siv lub teb chaws cov tswv yim zog thiab kev txhim kho txuas ntxiv ntawm tib neeg ib puag ncig kev paub, hluav taws xob tsheb tau maj mam hloov tsheb roj tsheb. Raws li tib neeg qhov kev thov rau hluav taws xob tsheb fais fab kev ua tau zoo thiab kev caij nkoj nce ntxiv, lub zog, tam sim no thiab qhov hluav taws xob ntawm cov tsheb hluav taws xob txuas ntxiv mus ntxiv, uas ua rau muaj kev xav tau ntau dua ntawm kev nyab xeeb kev ua haujlwm ntawm hluav taws xob tsheb hluav taws xob. Raws li ib feem ntawm cov thawj coj uas tswj lub hauv thiab tawm ntawm txhua lub high-voltage Circuit Court, high-voltage DC relays yog ib qho tseem ceeb lav rau kev nyab xeeb ntawm hluav taws xob tsheb. kuv lub teb chaws lub high-voltage DC relay lag luam yog loj hlob sai heev. Nyob rau hauv 2021, tag nrho cov lag luam loj ntawm high-voltage DC relays yog kwv yees li 5 billion yuan, thiab tag nrho cov xov tooj ntawm high-voltage DC relays rau tsheb thiab them pawg tshaj 24 lab. Nws kwv yees tias los ntawm 2025, kev lag luam loj ntawm high-voltage DC relays yuav ncav cuag 13.4 billion yuan. High-voltage DC relays kuj tau siv dav hauv thaj chaw photovoltaic thiab lub zog cia. Kab lus no muab cov lus qhia yooj yim rau high-voltage DC relays. Raws li cov ntsiab lus tseem ceeb ntawm high-voltage DC relays, cov ntaub ntawv tiv tauj tau txais kev saib xyuas dav. Feem ntau cov high-voltage DC relays nyob rau hauv kev ua lag luam raug xaiv thiab lawv cov kev sib cuag tau kawm kom meej.

1.1 Daim ntawv thov scenarios ntawm high-voltage DC relay

Lub zog tshiab tsheb tau nruab nrog high-voltage DC relays ntawm lub roj teeb system thiab lub cev muaj zog ntawm lub tsheb fais fab. Thaum lub kaw lus nres tsis ua haujlwm, nws ua lub luag haujlwm cais thiab lub luag haujlwm txuas thaum lub kaw lus khiav haujlwm. Thaum lub tsheb tsis ua haujlwm, nws tuaj yeem muaj kev nyab xeeb cais lub roj teeb ntawm lub tsheb hluav taws xob rau kev tiv thaiv. Txhua lub zog tshiab neeg caij tsheb yuav tsum tau nruab nrog 5 mus rau 8 high-voltage DC relays. Feem ntau cov kev siv ntawm high-voltage DC relays yog qhia nyob rau hauv daim duab 1, uas feem ntau muaj xws li lub ntsiab relays, pre-them relays, ceev them relays, zoo tib yam them relays, thiab auxiliary relays. Cov relays saum toj no muaj cov haujlwm sib txawv thiab qib tam sim no. Ob lub high-voltage DC relays feem ntau yog teeb tsa ntawm DC them pawg rau them kab tswj thiab kev tiv thaiv.

1 yog lub ntsiab relay, theem tam sim no feem ntau yog 100 A ~ 300 A; 2 yog pre-them relay, theem tam sim no feem ntau yog 10 A ~ 40 A; 3 yog qhov ceev them relay, theem tam sim no feem ntau yog 100 A ~ 400 A; 4 yog qhov yooj yim them relay, theem tam sim no feem ntau yog 10 A ~ 40 A; 5 yog tus pab cuam relay, theem tam sim no feem ntau yog 10 A ~ 40 A; 6 yog lub relay rau them pawg, theem tam sim no feem ntau yog 100 A ~ 600 A.

1.2 Cov qauv ntawm lub zog tshiab high-voltage DC relay

Cov qauv thiab kev sib cuag ntawm high-voltage DC relay yog qhia hauv daim duab 2, uas feem ntau suav nrogSilver Hluav taws xob tiv tauj, coils, hlau cores, static magnetic ncej, tso springs, arc extinguishing chambers thiab shells. Txhawm rau txo qhov kev yaig ntawm cov neeg sib cuag los ntawm arc, lub arc extinguishing chamber hauv lub relay feem ntau yog ntim nrog cov roj sib xyaw ntawm hydrogen. Qhov txo qis ntawm hydrogen tuaj yeem tiv thaiv kev sib cuag oxidation thiab txo kev tiv thaiv kev tiv thaiv, thiab cov thermal conductivity zoo heev ntawm hydrogen yog qhov tsim nyog rau kev tua ntawm arc. Tsis tas li ntawd, lub arc extinguishing chamber feem ntau yog ua ke nrog electromagnetic arc tshuab los txhim khu lub arc extinguishing muaj peev xwm ntawm lub relay, tab sis txoj hauj lwm ntawm arc extinguishing magnetic teb yog tsau thaum lub sij hawm tsim txheej txheem ntawm relay. Qee cov relays muaj cov ncej zoo thiab tsis zoo. Yog tias lawv txuas nrog rov qab thaum siv, lawv cov kev ua yeeb yam ntau yam yuav raug txo kom tsawg.

1.3 Cov kev xav tau ntawm kev ua haujlwm ntawm lub zog tshiab high-voltage DC relays

Kev khiav hauj lwm qhov hluav taws xob ntawm lub zog tshiab yog feem ntau 200 V rau 400 V. Lub zog ntawm lub cev muaj zog ntawm cov neeg caij tsheb tshiab thiab cov tsheb npav feem ntau yog 30 kW thiab 80 kW lossis ntau dua, raws li, thiab lub zog siab tshaj plaws mus txog 60 kW thiab 160 kW. los yog ntau dua, feem. Thaum qhov hluav taws xob tau nce los ntawm 400 V rau 800 V, qhov kev them nqi tau zoo dua qub, lub sij hawm them nqi luv luv, qhov tam sim no hauv kab me me, thiab lub zog poob me me, uas muaj zog.Silver ContactsRau Hluav taws xob txhim kho kev siv cov tsheb tshiab zog. Txawm li cas los xij, qhov nce hauv qhov hluav taws xob thiab lub zog ua rau cov kev xav tau siab dua ntawm cov hluav taws xob DC relays.

Piv nrog cov tsheb siv roj, cov tsheb tshiab lub zog muaj kev ua haujlwm tsis zoo, feem ntau cuam tshuam nrog: ①High voltage thiab tam sim no; Qhov hluav taws xob ntawm cov qauv tseem ceeb nce mus txog 300 V rau 400 V, thiab tam sim no nce mus txog 200 A txog 300 A, thaum lub sij hawm ntsuas hluav taws xob ntawm cov roj tsheb feem ntau yog DC 12 V thiab DC 24 V, thiab cov tam sim no feem ntau yog nyob rau hauv 50 A; ② Kev cuam tshuam tam sim no; ③ Kev ua txhaum loj tam sim no, luv luv tam sim no txawm tias tshaj 10 kA; ④ Lub tshav kub tsim los ntawm cov khoom siv hluav taws xob yog qhov loj thiab qhov kub thiab txias yog pom tseeb. Nws tuaj yeem pom tau tias qhov kev ua tau zoo ntawm cov roj tsheb ib txwm muaj qis thiab tsis tuaj yeem siv rau kev ua haujlwm ntawm lub zog tshiab tsheb.

Cov kev ntsuam xyuas ntau rau DC relays muaj xws li: ① resistive life test, qhov ntsuas tam sim no suav nrog ntsuas tam sim no thiab overcurrent; ② capacitive load hluav taws xob lub neej kuaj, feem ntau tsuas yog txuas tab sis tsis txuas; ③ txwv tsis pub muaj peev xwm kuaj; ④ Kev ntsuas hluav taws xob luv luv tam sim no, yuav tsum tsis muaj qhov tawg tshwm sim thaum lub sijhawm kuaj, thiab qhov yuav tsum tau ua rau luv luv-circuit resistance test yog qhia nyob rau hauv Table 1. Vim yog cov kev ua haujlwm nyuaj ntawm lub tsheb thaum lub sijhawm ua haujlwm, yog tias cov hluav taws xob luv luv. -circuited, lub high-voltage DC relay yuav tsum muaj peev xwm txiav tawm lub voj voog tsis muaj qhov txawv txav xws li kev sib cuag adhesion lossis relay tawg. Cov kev ua tau zoo ntawm high-voltage DC relays txawv ntawm cov chaw tsim khoom rau cov chaw tsim khoom, thiab feem ntau siab dua li cov qauv yuav tsum tau ua.

1.4 Qhov tshwm sim thiab muaj pes tsawg leeg tsom xam ntawm high-voltage DC relay hu

Lub ntiaj teb tshiab lub zog hluav taws xob high-voltage DC relay kev lag luam yog cov concentrated heev. Hauv xyoo 2022, peb lub tuam txhab lag luam thoob ntiaj teb suav nrog kwv yees li 70% ntawm kev ua lag luam. Daim ntawv no tshuaj xyuas lub siab-voltage DC relayKhoom NyiajTiv tauj Rau Hluav Taws Xob los ntawm cov chaw tsim khoom muaj npe nrov. Qhov ntsuas voltage thiab tam sim no ntawm relay yog DC 750 V thiab 250 A feem. Qhov tshwj xeeb pom qhov ntev yog qhia nyob rau hauv Table 2. Cov tsos ntawm kev txav thiab zoo li qub kev sib cuag tau pom nyob rau hauv daim duab 3 thiab 4. Qhov saum npoo ntawm qhov kev sib tiv tauj yog kho nrog nyiaj plating kom txo qhov kev sib cuag. Cov ntaub ntawv muaj pes tsawg leeg tau txheeb xyuas los ntawm X-ray fluorescence spectroscopy, thiab nws tau pom tias muaj pes tsawg leeg ntawm kev txav mus los thiab kev sib cuag zoo li qub. Lub ntsiab tseem ceeb yog Cu, thiab tus so yog cov khoom ntxiv Te, nrog rau cov ntsiab lus ntawm 0.3%. Nyob rau hauv qhov kev txiav txim ntawm lub arc, lub low-melting-point hlau tellurium decomposes los ntawm cov alloy, absorbs ib tug loj npaum li cas ntawm tshav kub thiab muaj ib tug txias nyhuv ntawm arc, yog li nws muaj ib tug tej yam muaj peev xwm tiv thaiv arc yaig; Thaum lub vuam pas dej txias txias, cov ntsiab lus tellurium sib cais ntawm kev sib cuag weld los ua ib qho Cu2Te brittle compound, uas muaj txiaj ntsig zoo rau kev tiv thaiv fusion vuam.

1.5 Kev soj ntsuam ntawm kev sib cuag txhua yam khoom

Cov conductivity ntawm kev sib cuag yog qhia nyob rau hauv Table 3. Cov conductivity ntawm cov tsiv thiab static contacts yog me ntsis qis dua cov ntshiab tooj liab, uas yog hais txog 58 MS / m. Lub hardness ntawm tus thawjKhoom Siv Nyiaj Sib cuag Rivetsyog qhia nyob rau hauv Table 4. Los ntawm cov hardness tshwm sim, nws yuav pom tau hais tias lub hardness ntawm lub tsiv kev sib cuag thiab cov zoo li qub kev sib cuag yog txawv heev.

1.6 Metallographic qauv

Cov qauv metallographic tau qhia hauv daim duab 5. Raws li tuaj yeem pom los ntawm daim duab 5, cov qauv metallographic ntawm kev txav mus los thiab kev sib cuag zoo li qub yog sib xws.

1.7 Scanning electron microscope thiab zog spectrum tshwm sim

Daim duab 6 thiab 7 yog lub zog spectrum tshwm sim ntawm kev txav thiab zoo li qub ntawm 30 npaug ntawm qhov kev pom. Cov txiaj ntsig tau pom tias qhov kev txav mus los thiab zoo li qub yog ob qho tib si ua los ntawm tellurium tooj liab, nrog rau cov ntsiab lus tellurium ntawm kev sib cuag yog 0.32% thiab cov ntsiab lus tellurium ntawm qhov zoo li qub.Nyiaj Hluav Taws XobRau Contactor yog {{0}}.41%. Txij li thaum lub zog spectrum yog ib qho kev soj ntsuam ib nrab, ua ke nrog X-ray fluorescence spectrum thiab metallographic dluab, nws tau txiav txim siab tias cov kev txav thiab cov kev sib cuag zoo li qub yog ua los ntawm cov khoom qub, nrog rau lub ntsiab tseem ceeb yog Cu thiab cov khoom seem yog. Te, nrog rau cov ntsiab lus ntawm 0.3%.

(1) Vim nws cov qauv tshwj xeeb thiab cov kab hluav taws xob tua hluav taws xob, lub zog hluav taws xob DC relays muaj lub zog luv luv-circuit breaking muaj peev xwm thiab kev tiv thaiv kev nyab xeeb, thiab tau siv dav hauv thaj chaw ntawm lub zog tshiab tsheb thiab them pawg.
(2) High-voltage DC relays yuav tsum tau mus dhau qhov kev sim siab xws li qhov kawg ntawm kev tawg muaj peev xwm thiab luv luv-circuit kam rau ua, thaum tseem tswj kev tiv thaiv qis.
(3) Cov kev txav thiab zoo li qub ntawm DC 750 V, 250 A high-voltage DC relays yog ua los ntawm cov khoom qub. Cov qauv metallographic ntawm Cov Khoom Siv Nyiaj Siv Hluav Taws Xob yog qhov sib xws, nrog lub ntsiab lus tseem ceeb yog Cu thiab cov khoom ntxiv ntxiv Te, nrog cov ntsiab lus ntawm 0.3%.

 

 

peb cov khoom

PebKhoom Siv NyiajRau Hluav Taws Xob ua lub luag haujlwm tseem ceeb hauv hluav taws xob. Cov khoom yog tsim los ntawm cov khoom siv nyiaj zoo, uas muab cov khoom siv hluav taws xob zoo thiab thermal conductivity, ua kom ruaj khov thiab ua haujlwm tau zoo ntawm cov khoom siv hluav taws xob tam sim no, txo qis zog poob, thiab muab kev tiv thaiv zoo rau kev ua haujlwm ntawm cov khoom siv hluav taws xob. Cov nyiaj hluav taws xob tiv tauj tau raug ua tiav, nrog lub ntsej muag du thiab tsis tshua muaj kev tiv thaiv. Qhov no ua rau cov lus teb ceev ceev thaum lub sij hawm qhib-tawm kev ua haujlwm, txhim khu kev qha Circuit Court hloov, thiab txhim kho kev ruaj ntseg thiab kev ntseeg siab ntawm cov hluav taws xob.