Dab tsi yog qhov yuav tshwm sim ntawm cov kev sib tw luv luv lossis qhib Circuit Court ntawm lub zog hluav taws xob?

一, cov nyom cov tshuaj tiv thaiv ntawm diode cov kab ke luv luv
1. Luv Luv Circuit Court kev siv thiab ua rau cov xwm txheej
Diode luv luv Circuit Court feem ntau yog tshwm sim los ntawm chip tawg, ntim tawg, lossis cov tawv nqaij tsis zoo. Hauv qhov kub thiab txias thiab huab cua siab ib puag ncig, kev nqus dej noo thiab nthuav dav ntawm cov khoom ntim hauv me me yuav ua rau sab hauv txheej txheem me me me me kom tawg; Nyob rau hauv Overvoltage Scararios, PN junctions tej zaum yuav raug coj mus tas li vim yog avalanche tawg. Piv txwv li, lub photovoltaic inverter project tau ntsib lub voj voog luv luv tsis pub dhau 10ms vim muaj kev tiv thaiv kev tawm tsam los ntawm xob laim.

2. Txheej txheem cuam tshuam
(1) Hloov pauv txoj kev sib luag
Ua tsis tiav ntawm Rectifier Circuit Court: Hauv ib Rectifier Circuit Court, yog tias ib qho Diode yog luv dua li cas, nws yuav ua rau kev hloov kho ACC thiab DC ob tog, ua rau transformer lossis inductor saturation. Vim yog ib lub sijhawm luv luv ntawm Rectifier Diode ntawm ib lub zog cia system project, cov tswv yim tam sim no surged rau peb zaug nyob hauv 5 vib nas this.
Circuit Luv nyob rau hauv lub freewheeling Circuit Court: hauv lub cev muaj zog tsav lossis inductive zog chaw nyob rau hauv lub freewheeling diode tuaj yeem ua kev puas tsuaj rau lub zog tawm tswv yim. Piv txwv li, nyob rau hauv ib lub tsheb hluav taws xob inverter phiaj xwm, vim yog lub zog luv luv ntawm lub cev muaj zog, ua rau IGBT Module mus tawg nyob rau hauv 100 μ s.
(2) tiv thaiv kev ua haujlwm tsis ua haujlwm
Kev tiv thaiv rov qab los tiv thaiv tsis ua haujlwm: Hauv DC tshuab ua tsis tiav: Hauv Circuit Court hauv kev tawm tsam kev puas tsuaj rau cov khoom siv thaum lub zog polarity tau thim rov qab. Lub UPS Project nyob rau hauv ib qho chaw khaws ntaub ntawv hauv ib qho chaw poob qis dua 500000} Circuitier Module Diode, uas ua rau lub rectifier module rau hlawv tawm thaum lub sijhawm txij nkawm tsis ua haujlwm.
Overvoltage tiv thaiv bypass: TVs Diode Luv luv Circuit Court yuav ua rau nws poob nws txoj kev clamping, thiab overvoltage yuav ncaj qha rau cov chaw tom ntej. Vim yog cov TVs Diode luv luv Circuit Court nyob rau qee yam photovoltaic array
(3) Kev phom sij ntawm thermal khiav khiav
Lub voj voog luv ua rau kev hloov pauv ntawm txoj kev tam sim no, ua rau muaj kev nce qib tseem ceeb hauv kev ceev ceev tam sim no. Kev sim ntawm cov cua lub zog hloov pauv tau qhia tau tias tom qab muaj lub zog muaj zog nyob ib sab ntawm 85 qib kev sib tw ntawm 2 feeb, ua rau saw thermal khiav tawm.

2, Qhov system txaus ntshai ntawm diode qhib Circuit Court yuam kev
1. Qhib Circuit Court mechanism thiab cov xwm txheej raug
Qhib Circuit Court feem ntau yog tshwm sim los ntawm vuam vau, nti tawg, lossis breakage. Hauv qhov chaw ua kev sib tw (xws li cov tsheb hluav taws xob), txhuas kev ua kom qaug zog yog ib qho laj thawj; Nyob rau hauv cov xwm txheej kub siab, mismatch ntawm lub thermal nthuav kev coefficient ntawm ntim thiab nti yuav ua rau tawg.

2. Txheej txheem cuam tshuam
(1) Kev cuam tshuam lub zog kis
Kev tso tawm kev tso zis poob: Hauv peb {{- paim theem Raccuitacuit Court, yog tias ib qho dide yog qhib raws li cov khoom siv, nws yuav ua rau muaj cov zis hluav taws xob ripple. Ib qho kev lag luam hluav taws xob muaj txiaj ntsig ua rau cov zis hluav taws xob Riple kom nce ntawm 5% mus rau qhov qhib Circuit Court ntawm Diode, ua rau cov khoom siv tsis raug ntawm cov khoom siv thauj khoom.
Disconnected Circuit Court: Hauv lub zog inductive Circuit Court, qhib freedor kom tau tshaj tawm rau tam sim nowease, uas ua rau muaj hluav taws xob ntau. Ib qho haujlwm tsav tsheb LED kev tsav tsheb muaj kev nyuaj siab rau hauv inductor voltage mus 800v (rated 400v) vim muaj cov khoom siv tsis pub dawb, ua rau luag tuag.
(2) Poob kev tiv thaiv muaj nuj nqi
Overcurrent tiv thaiv tsis ua haujlwm: hauv ib pab pawg sib txuas, yog tias ib qho ntawm diodes qhib, qhov seem yuav tsum tau nqa ib qho loj dua tam sim no. Qee lub zog cia roj teeb lub ntsuas hluav taws xob hluav taws xob ua haujlwm tau ua rau muaj lwm yam diodle ntawm ib diode, uas ua rau lub pob roj teeb.
Kev rho tawm haujlwm tsis ua haujlwm: Hauv photovoltaic moduot theem kev tiv thaiv, qhib Circais hauv cov bypass diode tuaj yeem ua exacerbate qhov kub nyhuv. Vim yog qhib Circais ntawm cov bypass Diode hauv qee qhov chaw nres tsheb fais fab hluav taws xob, qhov kub ntawm ib qho kev tiv thaiv tau nce mus rau lub teeb duab ntxoov ntxoo, ua rau khob tawg.
(3) qhov system ruaj khov txo qis
Qhib Circuit Court tuaj yeem ua rau hloov pauv hauv Circuit Court Topology, uas yuav ua rau kev resonance los yog oscillation. Ib lub tsheb hluav taws xob them cov khoom hluav taws xob tau txais kev txhim kho Circuit Court, ua rau LLC resonant Circuit CouThtual los ua ntau dua ± 15%, ua rau lub kaw lus tiv thaiv.

3, Qhov tshwm sim ntawm kev ua yuam kev hauv cov khoom siv hluav taws xob
1. Photovoltaic zog tiam
Cov kev sib txawv ntawm qib: Qhov qhib Circuit Court nyob rau hauv bypover diode tuaj yeem ua rau lub cev ua kom muaj ntau dua thaum muaj kev laus, ua kom muaj kev laus ntawm cov khoom ntim ntim; Circuit Court luv yuav ua rau DC sab arc txhaum. Raws li kev txheeb cais los ntawm 5Mw photoovoltaic lub chaw nres tsheb fais fab hluav taws xob rau 18% ntawm cov khoom tsis ua tiav, ua rau txhua xyoo poob ntawm ntau dua 500000 ntawm lub hwj chim.
Inverter qib kev cuam tshuam: Luv Circuit Court ntawm Rectifier Diode tuaj yeem ua rau tsis muaj kev tswj hwm DC npav voltage, ua rau igbt modu modu module tawg; Qhib lub ob tog ua rau cov tswv yim sib txawv tam sim no, ua rau muaj suab nrov hloov suab thiab kev co.
2. Lub Zog Cia Lub Cev
Cov teeb meem roj teeb: qhib Circuit Court hauv Circuit Court Diode tuaj yeem ua rau muaj qhov tsis sib xws hauv lub roj teeb pob thiab ua kom lub neej luv voj voog; Lub sijhawm luv luv yuav ua rau overcharging / overdischarging. Vim tias qhov txhaum ntawm qhov ntsuas ntawm lub zog hluav taws xob chaw nres tsheb lub pob hluav taws xob tau nce ntawm 3% / xyoo mus rau 8%.
DC / DC Kev Hloov Siab cuam tshuam cuam tshuam: Qhib Circuit Court of synchronous pectifier diode tuaj yeem ua rau muaj kev ua tau zoo ntawm ntau dua 10%; Circuit Court luv yuav ua rau cov zis voltage overshoot.
3. Tsheb Hluav Taws Xob Them Kev Them Nqi
Them Qhov Teeb Hloov: PFC Circuit Court Circuit Court yuav ua rau cov lus qhia tam sim no distortion tus nqi kom ntau tshaj tus qauv, cim kev tiv thaiv kab phiaj; Kev qhib Circuit Court yuav ua rau lub zog ua kom poob qis dua 0.7 thiab ua rau zoo los ntawm cov phiaj xwm fais fab.
Kev cuam tshuam ntawm kev them nyiaj ntawm lub tsheb Lub sijhawm luvfab yuav ua rau overvoltage hauv lub roj teeb. Hauv qee qhov kev sim tsheb rov qab, ntau dua 20000 lub tsheb tau rov qab vim muaj kev pheej hmoo ntawm Circuit Court.
4, Txhaum kev kuaj thiab kev tiv thaiv kev tiv thaiv
1. Online tshuaj xyuas thev naus laus zis
Voltage / Kev soj ntsuam tam sim no: Lub sijhawm soj ntsuam tiag tiag saib xyuas ntawm cov voltage thiab tam sim no thoob plaws ntawm cov tswv yim, ua rau muaj kev hloov pauv tsis zoo tshaj 10%.
Infrared temperature measurement: Infrared thermal imager is used to monitor the surface temperature of the diode. When the junction temperature exceeds the limit (such as SiC diode>175 degree), nws yuav cia li kaw.
Kev tsim txom Spectrum: Los ntawm kev txhaj tshuaj siab - cov cim qhia txog infinity nyob rau hauv qhib Circuit Court thiab xoom hauv Circuit Court.
2. Redundant Tsim
Parallel Kev Rov Qab: Ntau cov dodes txuas nrog hauv parallel hauv cov voj voog tseem ceeb, thiab lub kaw lus tseem tuaj yeem ua haujlwm nyob rau hauv qhov kev tshwm sim ntawm ib qho kev txhaum. Piv txwv li, qee yam cua fais fab inverter siv 4 parallel sic diodes, thiab qhov system efficiency tsuas yog txo qis los ntawm 2% tom qab ib lub voj voog.
Backup Txoj Kev: Nruab ib lub tshuab hloov pauv hauv parallel nrog cov diode nrog cov kab ke hauv kev tawm tsam Circuit Court, thiab cia li hloov mus rau txoj kev hloov thaum lub DIode swb.
3. Cov khoom siv thiab cov txheej txheem hloov kho
Moh xim av tiv thaiv tshuab hluav taws xob tiv thaiv yog siv los tshawb xyuas kev ntseeg tau los ntawm ob chav kuaj (85% Rh / 1000h).
Kev ntxhov siab qis soldering: Siv cov txhuas - ua rau muaj kev sib tw tsis kam los ntawm kev co kev xeem (xws li 5-2000hz / 10g).
5, Kev Kawm Rooj Zaum: DIode txhaum nyob rau hauv ntug dej ntawm kev hloov pauv cua ncaug
Ib qho chaw tawm hluav taws xob ntawm pob hluav taws xob muaj nyob rau thaj chaw Typhoon, thiab cov thawj tsim qauv siv silicon - rolles diodes. Tom qab 2 xyoos ntawm kev ua haujlwm, ntau yam Diod ua tau tawg (qhib Circuit Court) vim 3 dodes tau luv luv raws li cov tshuaj tsuag. Malfunction ua rau:

Kev cuam tshuam kev cuam tshuam tus mob lub zog: 12 inververers kaw, ua rau txhua hnub poob ntawm ntau dua 50mh ntawm lub zog ib txwm muaj nyob rau hauv Inverter;
Khoom siv saw cov khoom puas: igbt module tawg tshwm sim los ntawm cov kab ke tsis ntev, cov nqi kho tau ntau dua 2 lab yuan;
System Qhab Tawv: Qhib Circuit Court ua rau cov tswv yim sib quas ntus tam sim no, thiab lub suab nrov hloov mus txog 85dB (tsim<65dB).
Txoj kev npaj txhim kho muaj xws li:

Ntaus cov cuab yeej hloov kho: hloov nrog SIC diodes thiab tej ceramic ntim;
Cov txheej txheem kev sib cav: Siv cov nkhaus kev co kom nruj thiab muaj peb lub tsho muaj txiaj ntsig;
Tshuaj xyuas kev hloov kho: tso cov ntsuas kub thiab txias thiab kev co.
Tom qab kev txhim kho, lub kaw lus tau ua tiav tsis tu ncua rau 3 xyoos tsis muaj Diode swb, nrog ib lub zog txhua xyoo nce ntawm 12% thiab tus txij nkawm raug txo 70%.