What's the load (5A?  50A?), and the required regulation (5%, 10%, in
the neighborhood, etc)?

If 10% under is ok, then make a full wave rectifier from AC mains.

120V RMS = 169.68V p-p
Full wave with appropiately sized caps = ~84vdc

-Adam

Chris Loiacono wrote:

>Once again, I'm not looking for anyone to do my work for me - just hoping
>someone can give me a little push down the hill.
>
>I'm after the lowest cost way to make the 90V needed for a brush motor PWM
>speed control w/ current limit.....Any ideas as to where I might start
>looking?
>
>TA,
>Chris
>
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