Re: [CAD_CAM_EDM_DRO] Re: Mariss' power supply circuit

At the risk of being old fashioned you might consider isolating yourself
from the AC mains using a motor-generator (MG) setup. Moderately severe over
voltage would not be a problem to an MG set. They also tend to eat spikes
and short dropouts. Add a big flywheel and you can ride out all sorts of
nastiness <G>. IIRC at one time MGs and LARGE flywheels were the core of the
emergency power for Cheyenne Mountain.

----- Original Message -----
From: "Les Watts" <leswatts@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, June 19, 2002 4:46 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Mariss' power supply circuit


> Yes that sounds about right. I figure peak current is determined
> by either armature saturation or magnet coercivity and has a safety
> factor. I don't think it's thermal because the time is so short.
>
> A high line voltage perhaps causing an amp failure and a motor over rev
> would seem to be one condition where a braking resistor would be
> preferable to shorting the windings though... then the regeneration
> current could exceed max locked rotor. My floating neutral can
> (and quite possibly will) do that. I need a diesel generator or something.
> I may just end up running the computer and servo amps off of 240vac.
>
> Les
>
>
> Leslie Watts
> L M Watts Furniture
> Tiger, Georgia USA
> http://www.rabun.net/~leswatts/wattsfurniturewp.html
> engineering page:
> http://www.rabun.net/~leswatts/shop.html