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700D227912-409 Datasheet(PDF) 4 Page - List of Unclassifed Manufacturers |
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700D227912-409 Datasheet(HTML) 4 Page - List of Unclassifed Manufacturers |
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4 / 4 page  Power Ring Film CapacitorsTM SBE Inc. 81 Parker Road telephone: 802.476.4146 web site: www.SBElectronics.com Barre, Vermont 05641 USA fax: 802.661.3950 e-mail: PowerRing@SBElectronics.com SBE Part 700D227912-409 SBE reserves the right to amend design data Advantages of Power Ring DC Link Capacitors • Abilitytohandlehigherripplecurrentswithless capacitance,weight,andvolume • Useof105°CICEcoolantforpower electronics cooling • DemonstratedMTTF>>20,000hoursforrealistic operatingconditions,duetolowerlossesand betterthermalperformance • MinimizationofIGBTovershootandeliminationofthe needforadditionalsnubbercapacitors • MosteffectiveisolationofDCstorageorsupply fromACswitchingartifacts • LowestindustryESLat<5nHtypicalwitha properly integrated bus structure • Smaller inverter packaging • Overall system cost savings • Capacitancefrom400µFto2500µFandvoltages from250Vdcto1200Vdc TheSBEPowerRingFilmCapacitors™utilizetradition- ally available and economical polypropylene and poly- estercapacitordielectricfilms.However,thepower of the shape™allowsforboththermalandelectrical performancewhichhasbeenunachievableinthefilm capacitor industry to date. Power Ring System Performance ThecombinationoflowestavailableTrise,ESRandESL coupledwithhighestripplecurrenthandlingcapability enablethedevelopmentofindustryleadinginverter designswithunbeatableperformanceandreliability. Lowest available Trise for a given ripple current Lowest available ESL, less than 5nH demonstrated with optimal integrated bus Lowest available ESR, less than 150 micro-Ohms typical Crownterminalarchitectureprovidesforamultitude ofcurrentpathswhichallowsthemonolithiccapacitor tofunctionasadistributedelementwithamuchlower ESRthananequivalentarrayofsmallerparts.SBEhas developedanextgenerationcapacitorsimulationtool thatallowsaccuratecalculationofhotspottempera- turetoallowoptimalratingwithexcellentreliability. Integrating the Power Ring in an Existing Design The“stacked”inverterdesignevolvesfrommodifying atypicalautomotiveinverterbyutilizingtheexcess spaceleftabovetheIGBTmodule(figure1).Bybend- ingtheendofthelaminarbusplate,theIBGT,die, coolingplate,andtheringcapacitorare“stacked”on topofeachotherinasymmetricalfashion.Thering capacitor is placed underneath the cooling plate. ThecoolingplateissharedwiththeIGBTmodule whichismountedonthetop. Figure 1 Figure 2 Figure2showsthe“stacked”inverterdesignafterthe integrationoftheringcapacitorandthelaminarbus plate.Bynowcombiningbothaspectsofverticalinte- grationandthelowtemperaturerisecharacteristics ofthecapacitors,anincreaseto50%ormorevolume reductionisrealisticallypossible.Theseimprovements clearlytranslateintoweightandcostreductions. |
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