用于实现高密度 AI_ML 机架的机电互连解决方案支持 +_-400V 直流电源.pdf

1、Electromechanical Electromechanical Interconnect Solutions for Interconnect Solutions for HighHigh-Density AI/ML Racks Density AI/ML Racks with+/with+/-400 V DC Power400 V DC PowerMolexMolexNrupathunga Chakravarthy SRTechnology Manager/MolexAnumalasetty Sai Surya TejaTechnology Engineer/MolexElectro

2、mechanical Interconnect Solutions for High-Density AI/ML Racks with+/-400 V DC PowerRACK&POWERAgendaFuture Trends in HVDC ArchitectureIntroduction to HVDC Power Systems for AI/ML RacksTechnical Specifications and Design Considerations Power SystemsComparison of Traditional AC vs.HVDC DistributionSaf

3、ety Aspects of HVDC SystemsInnovative Approaches to Busbar and Connector Design543216Introduction to HVDC Power Systems for AI/ML RacksPower delivered on a three-wire system with+400V,0V,and-400V.This makes insulation easier and allows devices to utilize the full 800V differential.Bipolar Architectu

4、reThis approach leverages mature 400V components developed for electric vehicles.It gains the benefits of an effective 800V distribution with lower current and copper usage.400V ComponentsSupports rack power ratings of 140150 kW and beyond,as required by dense AI/ML racks.This results in a morecompa

5、ct power delivery network.Rack Power RatingsBusbars,connectors,and cables must be re-engineered to handle the higher voltage and current.They must have excellent thermal performance,reliability,safety,and space efficiency.Electromechanical ComponentsTechnical Specifications and Design Considerations

6、 for+/-400V DC Power SystemsVoltage and ArchitectureCurrent per power rail could be 150200 A for a 150-kW load split across the+400 and-400V rails.These currents necessitate careful thermal managementPower CapacityConversion Stages85-90%95%AC SystemsHVDC SystemPower conversion inAC systemsPower conv