1774Views9Replies

Author Options:

Anyone know where I could acquire a 120VAC-24VDC converter that outputs ~20A? Answered

Preferably at a price that doesn't break the bank.  I've been thinking about setting up a UPS for a robot that I'm working on, and 20A should be a bit higher than the amount of current that it would draw when up on jacks.

9 Replies

user
steveastroukBest Answer (author)2011-11-23

It's only 500W, so it's not a difficult one to source. Try people like XP power
This looks about right for you LCL500PS24 207 USD.
Steve

Select as Best AnswerUndo Best Answer

user
nurdee1 (author)2011-11-23

You might try converting two computer power supplies and then hooking them together in series to double the voltage. I have never done this but it should work in theory.-

Select as Best AnswerUndo Best Answer

user
killersquirel11 (author)nurdee12011-11-24

I don't think that would work. Since they have the same ground (i think), you'd create a short between the 12V of the low one and the GND of the high one, which would probably create a briefly entertaining light show, followed by the familiar odor of blue smoke.

Select as Best AnswerUndo Best Answer

user
nurdee1 (author)killersquirel112011-11-24

You could be right I didn't think of that. One other thing you could tryis to get a high end computer p[ower supply like maybe 500-1000 watts and use the negative 12 volts and the positive 12 volts to get a twenty four volt difference. You will need a high wattage power supply to do this because the low wattage ones don't allow you to draw much power from the negative twelve volt.

Hope this works.

P.S. Happy Thanksgiving

Select as Best AnswerUndo Best Answer

user
aelias36 (author)2011-11-23

http://www.google.com/products/catalog?q=24+volt+power+supply+20a&hl=en&bav=on.2,or.r_gc.r_pw.r_cp.,cf.osb&biw=1283&bih=679&um=1&ie=UTF-8&tbm=shop&cid=3237714166376209745&sa=X&ei=4TzNTpm-POnj0QGB5rwY

Tada! I'm not sure wether this wall wart is regulated, though.

Select as Best AnswerUndo Best Answer

user
killersquirel11 (author)aelias362011-11-23

20VA isn't 20A
VA stands for Volt-ampere.  In the DC context, it is equivalent to power.  In the AC context, it is the measure of apparent power.
So what you have shown actually supplies less than one amp.

Google results for what I'm looking for are much less fruitful...

Select as Best AnswerUndo Best Answer

user
killersquirel11 (author)aelias362011-11-23

Only thing that tipped me off was the price, then looking closely I remembered some EE class I took a while ago, followed up by some wikipediage to verify

Select as Best AnswerUndo Best Answer