seven_segment
Member level 2
Power supply problem
Hello there. I'm planning to construct a low voltage AC power supply with outputs for 12v, 24v and 36v. I plan to run all these voltages down a 3 core cable as follows:
Core 1: Gnd
Core 2: 12v
Core 3: 36v
This should allow me 36v between cores 1 and 3, 24v between cores 2 and 3, and 12v between cores 1 and 2. It seems unlikely that I will be able to find a transformer with the tappings I need, so instead I will use two seperate transformers out of phase.
The problem is this: A 36v transformer of say, 1000VA, will have a lower current rating than the equivavalent 12v transformer. Let's say I only want to use 24v, at 1000VA I *should* be able to pull just over 41 Amps. Unfortunately my 36v transformer is limited to 27 Amps, although the 12v transformer is rated to a huge 83 Amps. Will the 24v output be limited by the maximum current of my 36VA transformer? Can I draw a full 41 Amps?
Hopefully the above made sense! Cheers!
Hello there. I'm planning to construct a low voltage AC power supply with outputs for 12v, 24v and 36v. I plan to run all these voltages down a 3 core cable as follows:
Core 1: Gnd
Core 2: 12v
Core 3: 36v
This should allow me 36v between cores 1 and 3, 24v between cores 2 and 3, and 12v between cores 1 and 2. It seems unlikely that I will be able to find a transformer with the tappings I need, so instead I will use two seperate transformers out of phase.
The problem is this: A 36v transformer of say, 1000VA, will have a lower current rating than the equivavalent 12v transformer. Let's say I only want to use 24v, at 1000VA I *should* be able to pull just over 41 Amps. Unfortunately my 36v transformer is limited to 27 Amps, although the 12v transformer is rated to a huge 83 Amps. Will the 24v output be limited by the maximum current of my 36VA transformer? Can I draw a full 41 Amps?
Hopefully the above made sense! Cheers!