My needs for a cheap and powerful DC power supply led me to server power supplies. There is an abundance of info out there on different power supplies you can use but most of which have a rather complex and error prone process to use in a series string for higher voltages. The psu I picked is from HP C7000 commercial servers and are rated at 2450w. I got 4 of these bad boys sent to my door for $60 compliments of ebay. https://www.ebay.com/itm/Lot-of-4-HP-Bl ... 2954499121
All that is needed to run these in series for 24, 36, 48... is to remove the inner components placing them on an electrically isolating surface. It is worth mentioning that these are 220-240v power supplies.
Hell no it's not safe, but it works extremely well!
AdvancedEnergySys wrote: ↑Wed Oct 14, 2020 8:21 am
My needs for a cheap and powerful DC power supply led me to server power supplies. There is an abundance of info out there on different power supplies you can use but most of which have a rather complex and error prone process to use in a series string for higher voltages. The psu I picked is from HP C7000 commercial servers and are rated at 2450w. I got 4 of these bad boys sent to my door for $60 compliments of ebay. https://www.ebay.com/itm/Lot-of-4-HP-Bl ... 2954499121
All that is needed to run these in series for 24, 36, 48... is to remove the inner components placing them on an electrically isolating surface. It is worth mentioning that these are 220-240v power supplies.
Hell no it's not safe, but it works extremely well!
I use one Meanwell PSU in my MAzda as my 600W DCDC converter. It works well from 360Vdc even though it is made for 230Vac power. It is able to go up to 420Vdc. Since there is a switcher inside it stabilizes AC first through a diode bridge and then chops it down to 13,6Vdc.
Now if you would use 60Vdc or more models you would use 6x and would wire them in series to get 360Vdc. This will give you 15kW charging capability in 3phase! If you could also control the current on them you could wire a simple control for lowering the power for home charging.
dima wrote: ↑Fri Nov 13, 2020 5:59 pm
I've used 2x IBM (ARTESYN) for 24V. Isolation important! + a signal wire. (server power supplies do not turn on by themselves)
Normally, yes isolation is important and that RC forum is where I started too! I'm not sure what you mean by "by themselves" but the way you "jump" or "hack" them is by bridging pins, I have mine soldered so...mine turn's its self on?
My power supply runs on 220VAC/DC so it's not tied to ground at all. I know, dangerous. In addition the power sections of my power supply are tied together. So there is no need to modify any of the ground planes and the order of the supplies in series doesn't matter either. This also means I can just add on PSU's in series to get higher voltages
