Brian Roth
Well-known member
I am writing this because of some battles I'm having with the switcher PSU's for a Neve Capricorn digital recording desk. The "DSP rack" has two 5 Volt/200 Amp switching power modules with DC outputs which are hard-wired/bolted to each other via large/thick copper bus bars. The service manual info is kinda vague on how to set the voltage trims (like "each has to be within 0.1 VDC of the other"), so I've been in contact with AMS-Neve tech support for assistance. (IE, under what conditions are the trims supposed to be set...idling? Under load? If under load, how can I "iso" one from the other? etc etc)
In the past, I've encountered dual PSUs in things like large PA desks, but each PSU was isolated from the other via high current diodes.
So, I now realize I need some knowledge as to how two (or more?) PSUs can have their DC outputs literally paralleled and yet not "fight each other". I guess large computer mainframes/servers use this same sort of load sharing, but I've never looked deeply into how it is supposed to be done correctly.
In a way, it all reminds me of the issues when using jumper cables to parallel the 12v batteries between two automobiles....
Best,
Bri
In the past, I've encountered dual PSUs in things like large PA desks, but each PSU was isolated from the other via high current diodes.
So, I now realize I need some knowledge as to how two (or more?) PSUs can have their DC outputs literally paralleled and yet not "fight each other". I guess large computer mainframes/servers use this same sort of load sharing, but I've never looked deeply into how it is supposed to be done correctly.
In a way, it all reminds me of the issues when using jumper cables to parallel the 12v batteries between two automobiles....
Best,
Bri