RequirementsConsiderations of Next Generation ORv3 PSU and Power Shelves.pdf

1、Requirements/Considerations of Next Generation ORv3 PSU and Power ShelvesCihan Aydin,Sen.Electrical Engineer,Delta Energy SystemsHarry Soin,Senior Director,Advanced EnergyRequirements/Considerations of Next Generation ORv3 PSU and Power ShelvesRACK&POWERPOWER AND COOLINGComparison ORV3 PSU to ORV3 H

2、igh Power Rack PSUCihan AydinDifferences ORV3 High Power Rack to ORV3 3kW PSUPulse load management modeOutline Features.Harry SoinEfficiency CurvePSU to BBU transferThermal performanceContentComparison ORV3 to ORV3 HPR PSUComparison ORV3 PSU to ORV3 HPR PSU520mm to 640mm increase by 23%3kW to 5.5kW

3、increase by 83%Power increase from 18kW to 33kW within same shelf outer dimsensionsTransition to BBUTransition method changed from a output voltage drop by 3V to a AC_LOSS signal from PSU Shelf to BBU to activate BBUsPulse load requirement with adjusted limits(max.increased from 155%to 160%)Differen

4、ces ORV3 High Power Rack to ORV3 VbustimeV_BBU_trigger 48.5V48VPSU runs for 20ms FLBBU runs up to 240sstart of ac outageBBU starts in 4msecPSU voltage drops by 3V after its holdup energy is lost by 50%BBU startsNote1:all numbers with+/-0.25%accuracy.Note2:PSU and BBU voltage droop is 0.5V for 0-100%

5、load.Note3:BBU is triggered after Vbus is 48.5V for 2ms and starts up within 2ms(4ms total).Note4:if BBU current 48.5V for 200ms,BBU goes to the stand by mode.Note5:PSU hold-up energy is 60J for loads up to 150%.Note6:PSU 3V drop should occur after its hold-up energy is lost by 50%.This can be done

6、by setting a proper trigger value on the PSU PFC bulk voltage.Note7:PSU 3V drop fall time is 1ms(3V/ms.)PSU turns on after ac backBBU turns offBBU turns off after 200msec48V47.5V47.5VThe PSU shall have the function of pulse load management,especially for GPU-based load possibly with repetitive peak