When I say pro’s, I mean the server grade hot-swap power supply manufacturers. ETASIS, 3Y and Delta.
When I was talking about stealing designs, I was explaining why it may be so hard to find info about paralleling “switched mode power supplies”, one of the popular generic names for this type of power conversion device.
It is almost impossible to design electronic assemblies that cannot be duplicated and relabeled. If electronics designer-manufacturer “A” designs a hot-swap power supply system that works and becomes popular; then then manufacturer “B” could make it cheaper and sell it for a profit, if he knew how.
Fortunately, for designer-manufacturer “A”; most manufacturers are too cheap, and profit margins are usually so small, to buy something, take it apart and reverse engineer their own product.
There may be reference material on how switched mode power supply paralleling circuits work, but I have not Googled it out yet. The only info that I remember finding is that there is a diode network based passive design and an active design. I have not seen anything beyond that.
End of Parallel SMPS design info search
Master-Slave setups should be fine. There should be no problems as long as “ground” is the only shared output. Problems cannot happen long as both power supplies are NOT directly connected to the same device.
IDE, and SCSI, cable connections between the drives and the motherboard, or controller card, should be okay for standard devices. Neither standard uses a direct power buss connection in the connector cables. (except ground, and I checked SATA too)
BUT, connecting one power supply to the motherboard ATX power connector AND connecting the OTHER power supply to the motherboard’s secondary connector is probably a BAD thing. Unless you have a motherboard that was designed (like some server mobo’s) to use two power supplies. By secondary I mean the ATX 12V connector or hard drive style connector that some mobo makers add to help people with old fashioned non-ATX12V power supplies.
So long, bye, I have enuff other things to do, I am gone until next time.