300W AC-DC converter AC 220V 230V to DC 24V 12.5-15A (peak current) power switching Transformer.
Would it be possible to run two of these in parallel?, and would this then give you a total output of 600W DC. 25 - 30A (peak current) ?.

 

300W AC-DC converter AC 220V 230V to DC 24V 12.5-15A (peak current) power switching Transformer.
Would it be possible to run two of these in parallel?, and would this then give you a total output of 600W DC. 25 - 30A (peak current) ?.

You would need to connect them in such a way as to prevent "current hogging".

 

You would need to connect them in such a way as to prevent "current hogging".

Thank you for you reply to my thread.

 

300W AC-DC converter AC 220V 230V to DC 24V 12.5-15A (peak current) power switching Transformer.
Would it be possible to run two of these in parallel?, and would this then give you a total output of 600W DC. 25 - 30A (peak current) ?.

I guess, it's easy. Supply the load via diodes, two 15-20A diodes needed.

CONVERT1 + ----- +diode1- ----- load+
CONVERT2 + ------ +diode2- ----- load+
CONVERT1 - -------CONVERT2- -------- load-

 

300W AC-DC converter AC 220V 230V to DC 24V 12.5-15A (peak current) power switching Transformer.
Would it be possible to run two of these in parallel?, and would this then give you a total output of 600W DC. 25 - 30A (peak current) ?.

Maybe. It depends on how they deal with overloads. If they go into current limiting at 300W, then they will work fine. If they trip out and restart, your not onto a winner.

 

One question not asked yet is about isolation of the supplies between input and output. That would make a huge difference if they are not adequately isolated. I am guessing that the supplies are two of the same kind, nominally identical.
A simple test will be to connect them in parallel using 1/4 watt ten ohm resistors, both positive to positive and negative to negative, and mains inputs in parallel as well. The resistors will serve as fuses if there is a problem and no damage will be done. It will be easy to measure the voltage across the resistors and see how close the supplies are. I am guessing that the supplies do not have connections for remote sensing.
If the resistors are not warm after a few minutes, or the voltage across them is close to zero, then you should be all right connecting them directly in parallel.

 

One question not asked yet is about isolation of the supplies between input and output. That would make a huge difference if they are not adequately isolated. I am guessing that the supplies are two of the same kind, nominally identical.
A simple test will be to connect them in parallel using 1/4 watt ten ohm resistors, both positive to positive and negative to negative, and mains inputs in parallel as well. The resistors will serve as fuses if there is a problem and no damage will be done. It will be easy to measure the voltage across the resistors and see how close the supplies are. I am guessing that the supplies do not have connections for remote sensing.
If the resistors are not warm after a few minutes, or the voltage across them is close to zero, then you should be all right connecting them directly in parallel.

Thank you for your reply to my thread.
I have since posting my thread, and before reading your reply, run them in parallel, on one of the circuit boards, the two heat sinks got a lot hotter, than on the other circuit board.

 

Thank you for your reply to my thread.
I have since posting my thread, and before reading your reply, run them in parallel, on one of the circuit boards, the two heat sinks got a lot hotter, than on the other circuit board.

But did they get any hotter than the would have done supplying 300W?

 

I guess, it's easy. Supply the load via diodes, two 15-20A diodes needed.

CONVERT1 + ----- +diode1- ----- load+
CONVERT2 + ------ +diode2- ----- load+
CONVERT1 - -------CONVERT2- -------- load-

Thank you for your reply to my thread, they say great minds think alike, the same suggestion was given to me on another forum website.

 

But did they get any hotter than the would have done supplying 300W?

Good Question, I will have to check that out.

 

The diodes will prevent back feeding but not do much to balance the loads, you need resistors for that.

 

Thank you for your reply to my thread, they say great minds think alike, the same suggestion was given to me on another forum website.

Each supply will have a rectifier somewhere near the output. Unless there is some weird synchronous rectifier arrangement it is highly unlikely any significant amount of power could be fed back into the supply via the output.
There is no need for the currents to be perfectly balanced provided that neither supply is being overloaded.