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Re: [Shop-talk] Phase converters???

To: <shop-talk@autox.team.net>
Subject: Re: [Shop-talk] Phase converters???
From: Steve Shipley <shiples@comcast.net>
Date: Mon, 27 Apr 2009 13:39:47 -0700
Check Ebay....
At 12:49 PM 4/27/2009 -0700, Randall wrote:
> > Good Day Group   I am interested in a phase converter or
> > phase shifter.  A
> > Capacitor type to run a 2 to 3 hp 3phase motor on 240 single
> > phase.  They come in a metal box about 8`x8` 3-4 hundred
> > dollars??
>
>Art, I don't have all the links handy, but there should be lots of info on
>the web about building your own.  There are several approaches; one way is
>to find a surplus 3-phase motor that is similar or slightly larger than the
>one you intend to power and use it as a "rotary transformer".  Here's one
>page with the basics:
>http://www.nojolt.com/how-to-build-a-rotary-phase-converter.shtml
>
>A simple capacitive type "converter" isn't going to work as well; and needs
>to be 'tuned' to the load, which is problematic for most "home shop" loads.
>Still adequate for some uses though; primarily cases where the load motor
>can be started under no load and you don't need full power from it (like a
>lathe or mill).
>
>But $300-$400 (even Canadian) should get you a full-blown 2-3hp VFD; eg,
>http://tinyurl.com/cav4xz
>
>Randall
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