120w+ TEC (peltier)
 

I'm looking for a bigger pelt to mod my portable refrigerator, anyone got a nice pelt which isn't used anymore?

Also, I need a better power supply to feed the thing, so i'm also looking for a VERY compact 220V AC->12V DC convertor which can deliver +7A on the 12V side.
(I already found small convertors which can handle 1.5A per piece, but will they work if I couple five of those in parallel?)

Re: 120w+ TEC (peltier)
 

can you give me some more information on the converters? It should work, I don't see a reason why it wouldn't

Re: Re: 120w+ TEC (peltier)
 

http://www.velleman.be/images/products/2/pss1215m.jpg

when they differ even the slightest bit in voltage, you have two powersources working against eachother, which would be a huge waste of energy at +10A. Not to mention the heat that waste of energy brings along.

Re: Re: Re: 120w+ TEC (peltier)
 

true, but it depends on the voltage difference there is. how big would the voltage difference be?
peltiers already produce a lot of heat and any transformer (especially such small one) has a considerable loss when transforming power

Re: Re: Re: Re: 120w+ TEC (peltier)
 

Rated +/- 5% I think, so 1,2V max.
power conversion is over 80% so pretty good.
If I go for the 226w pelt, those little things won't last a second, or I need a dozen of them. :)
So i'll have to look for some kind of external transfo, like one from a laptop. Or build one out of a PSU.

does a TEC need a stable input voltage?
I've seen it once, you could just use one big-*** transformator with an average voltage the TEC needs

Doesn't need really stable voltage, but it has to be DC. So that would require some big-*** diodes to rectify the sinal wave.

Last night, I was thinking about making an external power source out of a PSU. Its relatively small, can deliver the power without a problem and with a bit of modding, it looks like a big laptop PSU. :)

I'm looking for a pelt too, someone got one for me? :d

I bought a 230w one from easypanic, but it's too big (50x50 instead of 40x40). I'm going to try to use it anyway, I'll give you a call when it fails.

Ok, tnx
Wish you the best luck with it ;)

you can buy pelts @ www.loveno.be