Electronics > Beginners
Heavy duty AC to DC converter required
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mche1997:
Hi Dan, holy !, I must have looked at the different ones on the internet, they're big stacks like the size of a shoe box. Thanks for the extra info, I'll have another look tomorrow.
If I can't find the appropriate ones like you mentioned, can you sell me some ?

Thanks
tron9000:

--- Quote from: mche1997 on April 25, 2018, 08:30:58 pm ---...but its to go inside an enclosure the size of a 2 drawer filing cabinet and always gets transported around...

--- End quote ---
So something like this:


this is a 19" rack mounted case, 19" rack mounted stuff is pretty standard, save you from having to design your own enclosures: http://sierracases.com/19-inch-rack-mount-transit-cases
oldway:
Choosing a voltage lower than 300V is a much safer solution ....
 :-+
The switching power supplies for telecommunication have a nominal voltage of 56V, it's a great choice.

This is another approach to the problem that you had imposed in your first post.

First buy the used AC / DC converter (s) then do the electrolyser project according to what you have found...

The only limitation is the availability of such converters at a cheap price, especially if you want to make multiple copies.
BravoV:

--- Quote from: mche1997 on April 25, 2018, 10:58:25 pm ---Hi Dan, holy !, I must have looked at the different ones on the internet, they're big stacks like the size of a shoe box. Thanks for the extra info, I'll have another look tomorrow.
If I can't find the appropriate ones like you mentioned, can you sell me some ?

Thanks

--- End quote ---

Hint where to look for, try find cellular base stations installers/contractors, do few social engineering communication either thru email or phone calls, with the main purpose of getting informations on who/where/how cellular operators disposed/dismantled their outdated towers.

Not sure in UK, but there must be someones that do these cleaning and installing job as cellular towers get refreshed quite often.

This is how I got my quality industrial PSUs, some are even bigger wattage or higher voltage, even used, they're still very usable.

Most important thing is they're dirt cheap.

Example my hoards last year, got few of these for <$30/pcs.

Most of these quality PSUs are "designed" capable of running in series, parallel, master & slave & etc.

Just google the below PSU for it's new price.   >:D



Wish you good luck on your hunt.
dmills:
There are some 4kW Eltek SMPSU 4000 on ebay at the moment, not the smallest things I have ever seen and very slightly off the pace for efficiency, but very solid kit, and good for 85A @ 48V each!

IIRC somewhere in the region of £125 quid each, and brand new, you couldn't build it for twice that!

Alternatively there are Eltek flatpack HEs, but they want a little too much money, they are however compact.

I would second talking to telecoms service types, cell base stations are mad for every point on the power efficiency they can win, you not so much, and the telcomms gear tends to be REALLY nice stuff.

Regards, Dan.
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