Paralleling Power Supply Units Made Easy ???
I am considering paralleling a couple of 20a variable adjustable psu's for 40a charging. According to what I have read on the world wide inter-web, it can be done quite easily, provided the following ...
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The two supplies will share current when they are in current limit. That means setting both supplies to 15.5V or what ever when battery is discharged. You will get 40A.
If you set the supplies to 14.4V and when the battery reaches that voltage the supplies will switch from current mode to voltage mode. When in voltage mode, power supplies do not share current well. The higher voltage supply will back bias the other supply. Depending on the cable resistance, you may get something from the lower voltage supply.
I think it's a lot easier to get a 40A supply than to constantly baby sit the voltage adjust to get them to share.
If you set the supplies to 14.4V and when the battery reaches that voltage the supplies will switch from current mode to voltage mode. When in voltage mode, power supplies do not share current well. The higher voltage supply will back bias the other supply. Depending on the cable resistance, you may get something from the lower voltage supply.
I think it's a lot easier to get a 40A supply than to constantly baby sit the voltage adjust to get them to share.
