Re: [CAD_CAM_EDM_DRO] rotary phase converter

You can't get there from here. You need a 220v converter, and a
transformer. I designed, and had a 15KVA (about 20 hp) isolation trx built
for me with 220/230 taps on the primary, and a zig-zag wye secondary with
440/460/480 outputs taps, so I could zero-in real close on the voltage.
The reason for the zig-zag was to pull current through all three coils for
each output to balance the 'stray' leg-voltage that rotary converters are
usually stricken with. Cost me about $800, but maybe they'd do a second one
for less now. Contact me off-line, if that's the way you want to go. (I'll
tell you about the problems I had trying to get a 'commercial' unit to do
what I wanted.)

RayHex

p.s. I'm in N.E. Wisconsin, are you a YOUpper, or are you acrost the pond?

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> From: k8zre <rfs@...>
>
> I need to generate 460v 3 phase from 220v 1 phase line. I have read
> prior posted comments on rotary phase converters. There are a variety of

rotary phase converter products both new and used available. Any
recommendations, things to look for and things to avoid?? I need drive a
CNC mill that is wired for 460v 3 phase. Also using VFD GPD 506 for the
head(s).

>
> Thanx...Richard in Michigan.