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Hi easy peasy thx, but how if I am paralleling big current switching? I have 5 switching modul 30a each,to get 150a in total, do I need a big watt too in using a resistor for output to load?generally join the "+" to the "+" and the (-) to the (-) and hope the psu's have droop paralleling and current limit built in,
else you can put 0.22 ohms in each pos lead - going to the paralleling point - this is real world droop paralleling ....
But I think for sett the same voltages it is difficult thing peasy, coz that can be different even milivolt fault. My modul have 12volt and 30a each, this i send you the imagewhat features do the power supplies have?
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alternatively - use the same lengths of copper to connect to a common point - this will help current share if the output voltages are all set exactly the same ...
Hi brad thanks for ur detail answer, I will do experiment to get correct value of resistor in ohm/wattageThe aim is to create a voltage drop across each resistor. It should be the smallest amount necessary to make sure no power supply goes above 30A.
Greater voltage drop at the domineering supply. Least voltage drop at the underachiever.
It's hard to be sure what ohm value the resistors should be. Each time you try a different value it changes the distribution of current from all the power supplies.
Install diodes while experimenting, if you want to be certain no supply is forced into reverse current flow. Later you can remove the diodes.
Thx for your calculation peasy I will do experiment0.005 ohms in each line would give 0.15 volts @ 4.5W each .... likely enough for reasonable paralleling