Will this work for building a bench supply ?

120VAC---->isolation transformer---->rectifier---->160VDC---->filtering---->pot.controlledIGBT---->output 0-to-100+VDC

The IGBT is better as a switch then a regulator.

What kind of loads are you thinking about? I'd go with a very high frequency Switcher design but it depends on what you're after.

Also, if you get a step-down transformer you can clip some waste off of your filtered 160vdc you're planning to use to feed your 0-100v regulator. 60v is a lot of headroom. 120 to 100 transformers are pretty common.

ZipZapOuch said:

What kind of loads are you thinking about?

Click to expand...

Charging 12V, 21V, 40V and 80V batteries. Mostly not beyond 5 Amperes.
What do you refer to as 'common' 120-to-100VAC transformer in defunct equipment that can be salvaged ?