I am currently working on an application that involves converting +48vdc to -48vdc.
- I have an inverter that converts 120vac to 48vdc
- The 48vdc travels trough 22awg wire to a unit that requires a -48vdc input.
How can I get a -48vdc out of my inverter?
Hello Manny, Thank You for posting to the Forum.
Here are some suggestions.
1. if the 120VAC to 48VDC is isolated, you can connect the +48VDC output to ground and create a -48V output with the -48VDC output.
2. if the 120VAC to 48VDC is NOT isolated, your downstream -48 "unit" could be connected such that its + input connects to the ground and its - input connect to +48
3. if your first supply and second supply are not isolated, and share the same ground, then you will need a converter to take +48@xWatts and make -48@xWatts
Here is an example.
If I want to test this design, PMP7756, -48Vin 6V@18A out, I would take a +48V power source and connect:
+Vout of the source to PMP7756 ground, GND P100
-Vout(ground) of the source to PMP7756 -48V P101
Here is a picture of PMP7756.
This is an isolated output 6V 8A.
Your -48 "unit" may be isolated as well.
If the system grounding requires an intermediate stage, please provide details of the power required.
