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2 Meanwells in parallel?

1422 Views 11 Replies 7 Participants Last post by  mahtareika
So I was looking at ebay since they have 15% off buy it now auctions, and I could get two 350 watt 24 volt Meanwell power supplies for 84 bucks shipped. Can I use these in parallel to power a 62mm Peltier?
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Why would you do parallel? Don't you get more power in a series?

Also, I don't see why not.
Quote:

Originally Posted by HITandRUN View Post
Yes it is possible. What is the rating on the Pelti?
I was thinking about going with the 437W Qmax peltier, which I think has a max wattage rating of 875W.

ps: Thanks for the link! Rep+

Quote:

Originally Posted by xHassassin View Post
Why would you do parallel? Don't you get more power in a series?

Also, I don't see why not.
I'm not even sure what power supplies in series would look like. Can you elaborate? Also, why would you get more power in series?
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Quote:

Originally Posted by zootielolo View Post
I was thinking about going with the 437W Qmax peltier, which I think has a max wattage rating of 875W.

ps: Thanks for the link! Rep+

I'm not even sure what power supplies in series would look like. Can you elaborate? Also, why would you get more power in series?
No problem mate. I think I still have a Meanwell 24V 150W PSU and a cold plate from my Pelti days if you need it.
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Quote:

Originally Posted by zootielolo View Post
I was thinking about going with the 437W Qmax peltier, which I think has a max wattage rating of 875W.

ps: Thanks for the link! Rep+

I'm not even sure what power supplies in series would look like. Can you elaborate? Also, why would you get more power in series?
Apparently you get more voltage in a series, but more amps in a parallel, so would give out the same power, my bad... Not sure which would be more beneficial in this situation though


I assume that connecting power supplies in series would be just plugging them into each other, instead of each one into the circuit.
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if you wired the meanwells in series that would give you 48 volts not 24 .. and in any case the meawells are regulated so you can't run them at 48 volts (which you dont want anyway)

But to answer the original question of can you connect two 24 volt psu together and get twice the amps the answer is yes.. and i know this for a fact because that is what im using 2x 350 watt 24 meanwells they do take up twice as much space though .. and you need to adjust there out put to the same before connecting them up
Why don't you just get one of these: http://www.frozencpu.com/products/82...tl=g30c105s190. Cheaper and more efficient in the long run.
Quote:


Originally Posted by flak-spammer
View Post

Why don't you just get one of these: http://www.frozencpu.com/products/82...tl=g30c105s190. Cheaper and more efficient in the long run.

The two PSU's i'm looking at are 42-43 bucks a piece shipped. Do you mean a larger psu would be more efficient?
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No what I meant was that in general it's just simpler than trying to deal with two power supplies and the possible dangers that could ensue. They should actually be the same efficiency 87%. It's just easier if you have one PSU and you want to control the voltage.
Quote:


Originally Posted by xHassassin
View Post

Apparently you get more voltage in a series, but more amps in a parallel, so would give out the same power, my bad... Not sure which would be more beneficial in this situation though

I assume that connecting power supplies in series would be just plugging them into each other, instead of each one into the circuit.

You are attaching 2 PSUs to one load so both currents are added together.

You should ensure both supplies are set to the same voltage then the current draw will be shared equally. Differing voltages will cause problems.

There is no reason why you cant parallel PSU's together as Ultrasonic said but you cannot join them in series. At least not without a lot of modding internally.

I hate to say this but I don't think some of you have read hit and run's "Yes it is possible" link. Or possibly you did you didn't understand it.

To do what it said in that link you need specific meanwell supplies (or another brand.) where you can physically set one PSU to constant voltage (or master.) and the other to constant current these are specific modular PSU's designed to be daisy-chained together they are not the usual type of PSU.
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I'm using two of these with great success. The seller came down in price and shipped right away. They've been running ever since.

ETA 24 VDC 20 Amp, Power Supply
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