Need help with AC/DC Converter

Thread Starter

lotrfan76

Joined May 18, 2010
2
Hi everyone!
I am attempting to design a power supply which takes 120Vac and converts it to regulated 70Vdc @ 30A. I have some experience designing SMPS but never anything at this amperage. The last one I designed was +/-75Vdc @ 1.5A per channel.
Can anyone give me tips on higher current design? Is there a preferred method? I know I have probably left some huge holes in my description so if you have questions, ask away. However, at this point, my design is wide open to ideas.
Thanks!
 

marshallf3

Joined Jul 26, 2010
2,358
First of all 30A at 70V is 2,100W - right on the edge of a dedicated circuit 120 VAC duplex outlet with a 20A breaker so you're starting on the edge to begin with. I say "dedicated circuit" as in one that isn't connected to anything else and has #12 AWG running to it - most household outlets are connected as branch circuits and only have duplex outlets rated to 15A - they get a bit warm if you go past that.
 
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