Can two 12v power supplies be connected together to increase the amperage power
Two identical linear regulated power supplies may be paralleled, should there be a facility to do so.
There are linear regulated power supply models which have the facility to interlink the regulated drive fed to the driver transistors in two identical supplies.
Paralleling them would involve the following:

Adjusting the output voltage of each supply to within 10 mV DC.

Paralleling the output terminals.

Interconnecting the regulated drive terminals.


It goes without saying that both the power supplies are to be kept powered off, while carrying out the interconnection as per steps 2 &amp; 3 above.