Yuav ua li cas tsim cov Diode cov qauv sib dhos hauv lub zog redundant system?

一, Ntaus Xaiv Ntaus: Scene raws li parameter sib txuam
1. Tam sim no muaj peev xwm thiab kev sib cais tswj
Redundant Systems yuav tsum tau tiv nrog ib leeg module tsis ua hauj lwm cov xwm txheej, thiab partodel dodees yuav tsum tau raws li cov yuav tsum tau ua hauv qab no:

Rated tam sim no rov qab ua dua tshiab: Cov rated tam sim no ntawm ib lub raj tam sim no yuav tsum muaj ntau dua los yog sib npaug rau cov kab ke ntau tshaj x 0.8), nrog 20% ​​kev tiv thaiv kev tiv thaiv kev tiv thaiv. Piv txwv li, hauv 48v / 20A system qhov twg 4 kav dej txuas nrog hauv parallel, ib qho qauv yeeb nkab ntawm 30a lossis siab dua.
Tom ntej Voltage poob xwm yeem: VF dispersion ntawm schottky dodes Nyob rau hauv ib lub tsheb hluav taws xob tshiab obc rooj plaub, plaub 30a schottky donottky diodes nrog vf sib txawv ntawm ± 0.1v tau txuas nrog Reveriation tam sim no<± 5% in the entire temperature range.
2. Rov qab cov yam ntxwv thiab kev tiv thaiv
Thim rov qab withstand volgage: lub Diod VRRM xav tau ntau dua lossis sib npaug rau 1.5 zaug qhov siab tshaj plaws hluav taws xob. Piv txwv li, hauv lub xov tooj photuavic sib txuas, qhib Circuit Court tuaj yeem ncav cuag 1000V, thiab TVS DIODES nrog VRRM ntau dua lossis sib npaug.
Rov qab pib lub sijhawm rov qab zoo: ultra vas nthiv rov qab dodes nrog Trr<50ns should be selected for high-frequency switching scenarios. In a power supply case of a certain communication base station, UF4007 diodes (Trr=35ns) were used instead of ordinary rectifiers to reduce reverse recovery losses by 70%.
2, Kev Tsim Qauv Topology: ntsuas kev rov ua dua thiab cais
1. Parallel Cov Kev Sib Koom Tes Tam Sim No
Passering cov phiaj xwm tam sim no: Kev ntsuas tam sim no yog tiav los ntawm kev sib txuas 0.1-0.5 ω Tsawg qis kev sib koom ua ke tam sim no sib koom ua ke. Ib qho kev lag luam plc hluav taws xob ua rau lub raj thib ob sib txuas, thiab cov ceg rov qab tuaj yeem txuas tau nyob hauv 10 μ s thaum lub raj raj tsis ua tiav. Lub zog siv ntawm kev sib koom ua ke tam sim no tau tswj hwm tsis pub dhau 0.5W.
Nquag sib koom cov phiaj xwm tam sim no: Siv cov kev sib koom tam sim no xws li LTC4370, kev faib khoom tam sim no tam sim no yog kev hloov kho lub rooj vag voltage. Hauv cov ntaub ntawv nruab nrab cov ntaub ntawv fais fab hluav taws xob, 4-raj nyob mus ib txhis ua tiav load tam sim no kev faib khoom yuam kev<± 2% through active current sharing control.
2. Kev sib cais tsim
N +1 Cov Qauv Tshaj Tawm Tshwj Xeeb: Cov Qauv Qauv Qauv thiab Backup Module yog cais los ntawm kev ua tsis tiav uas tsis muaj kev cuam tshuam rau cov txheej txheem tawm. Lub zog siv ntawm qee cov khoom siv kho mob tau txais yuav cais tawm ntawm cov qauv tseem ceeb los ntawm kev ua txhaum cai
Rov qab mus hloov cov lus qhia txog kev hloov pauv ntawm Mosfet uas yuav tsum muaj kev sib cais ntawm LTC4416 rov qab nrog LTC4416 tswj tau rov qab ua tiav kev poob qis. Hauv cov ntaub ntawv tiv thaiv neeg rau zaub mov, cov tshuaj no txo ​​cov conduction voltage poob los ntawm 0.45V rau 0.03v, uas ua rau 12% nce rau kev ua haujlwm.
3, thermal kev tswj hwm: synergy ntawm tshav kub dissipation thiab kev ntseeg tau
1. Fais Fab noj xam thiab ua kom sov tawm
Muab xam los ntawm kev ua kom tiav: P {{0} oovg, tsawg vf dodes yuav tsum tau ua ntej rau cov xwm txheej siab tam sim no. Piv txwv li, nyob rau hauv tam sim no ntawm 12a, lub zog siv ntawm 0.45v schottky diode ncav tau nruab nrog 5.4w, thiab cov cua sov yuav tsum tau nruab; Lub 0.3V SIC Schottky diode muaj lub zog siv ntawm tsuas 3.6w thiab tuaj yeem dissipate tshav kub ib txwm.
Thermal Kuj Tswj: Siv tsawg thermal kuj ntim (xws li-220 nrog r} Nyob rau hauv rooj plaub kev tshawb fawb ntawm lub tsheb hluav taws xob them tus nqi, lub teeb tsa hluav taws xob tau txo los ntawm 45℃los ntawm kev ua kom zoo pcb tooj liab ntawv ci (ntau dua los yog sib npaug rau 100mm ² / a).
2. Lemout optimization thiab parasitic parameter sauv
Parasitic Inductance Tswj: Thaum pcb txheej, qhov ntev ntawm diode pin kev kev yuav tsum yog<5mm to avoid the formation of oscillation circuits. In a certain photovoltaic inverter case, by arranging parallel diodes on the same side of the PCB, the parasitic inductance was reduced from 12nH to 2nH, and the reverse recovery overshoot voltage was reduced by 60%.
Thermal Coupling Tsim: Hauv cov xwm txheej siab ceev ceev scenarios, ib txwm cov dej sov so tau siv los xyuas kom muaj kev kub ntxhov ntawm cov kev npau taws. Hauv cov ntaub ntawv sib txuas lus hluav taws xob ntau ntxiv tau txo los ntawm 15℃rau 5℃los ntawm txhim kho plaub dodes tightly tawm tsam lub tshuab cua sov.
4, engineering voov tseeb: kaw -} loop los ntawm kev simulation mus ntsuas tiag tiag
1. Simulation Cov Ntaub Ntawv Pov Hwm
Spice Model qauv simulation: Tsim tus qauv LTSPice rau Diode cov kev sib tw sib tw kom paub tseeb cov nyhuv tam sim no thiab kev faib tawm cov khoom xa tawm tam sim no. Nyob rau hauv ib qho qee cov ntaub ntawv tiv thaiv fais fab fais fab tuag, nws tau pom los ntawm kev sim uas muaj 20% tsis txaus ntseeg nyob rau hauv parallel diodes. Tom qab ua kom zoo tshaj plaws kev sib faib tam sim no tsis kam tiv taus, qhov tsis txaus ntseeg tau txo mus rau 5%.
Thermal simulation tsom xam: cua thiab lwm yam cuab yeej siv los simulate txoj kev thiab ua kom zoo ntawm cov qauv ntawm lub tshuab cua sov. Nyob rau hauv rooj plaub kev tshawb fawb ntawm ib lub zog hloov chaw fais fab, qhov siab ntawm cov kub dab dej finks raug kho los ntawm kev sim ua kom sov, kub tshaj plaws kub ntawm 130℃rau 115 degree.
2. Kev Xav Tau Kev Kuaj
Nres Kev Ntsuam Xyuas: Txheeb xyuas cov qauv kev txwv los ntawm kev ntsuas lub neej muaj kev ua kom nrawm. Nyob rau hauv ib tug tub rog fais fab qauv tsis swb tom qab 1000 mus ncig ntawm 1000 cycles ntawm qhov kub cycling los ntawm -40℃rau {}}} degree.
EMC kuaj: Xyuas seb lub suab nrov uas tau tsim los ntawm Diode rov qab rov qab ntsib tus qauv. Hauv kev tshawb fawb txog kev kho mob fais fab tuag, lub cathpacitor tau txuas nrog rau kev sib txuas los ntawm 45dB μ v txog 35dB μ V.
5, cov ntaub ntawv thov raug
1. Redundant Fais Fab Khoom Siv rau Kev Sib Txuas Hauv Paus
Siv 4 qhov kev sib tw 20a cov khoom siv hluav taws xob, txhua cais los ntawm SR1660 Schottky diodes (16a / 60v). Paub txog kev ntseeg siab los ntawm tus qauv hauv qab no:

Xaiv cov kev sib koom ua tam sim no: 0.3 ω / 5W xis tsim nyog, kom ntseeg tau tias lub raj tam sim no tsis pub tshaj 15A
Cov Qauv Kub Dissipation: Chaw ua cua sov ntau dua los yog sib luag rau 200cm ², kev sib tua kub<110 ℃ under natural heat dissipation conditions
Kev tiv thaiv muaj nuj nqi: TVs Diode (18v / 1kW) surpresses surges, varistor (150v) tiv thaiv overvoltage
2. Them Module rau cov tsheb loj
Hloov cov tsoos diodes nrog sic mosfets kom ua tiav poob qis redundancy:

Topology: rov qab {- -}}}}} rov qab c2m0080116d Siulet (12M ω)
Tswj cov phiaj xwm: LTC4416 tus tsav tsheb, nrog txoj kev tsim nyog voltage poob ntawm tsuas yog 0.1v
Kev Txhim Kho Kev Txhim Kho: piv rau cov kev daws teeb meem Dioode, qhov system efficiency tau nce los ntawm 92% rau 96%