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Re: RE Re: (400Hz) mil. xfmrs
Subject: c
Date: Tue, 6 May 1997 06:33:59 -0400
From: Dave <djb-at-erie-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
At 09:09 AM 5/3/97 -0500, you wrote:
>Subject: RE Re: (400Hz) mil. xfmrs
> Date: Fri, 02 May 1997 18:36:00 GMT
> From: robert.michaels-at-online.sme-dot-org (Robert Michaels)
>Organization: Society of Manufacturing Engineers
> To: tesla-at-pupman-dot-com
>
>
>
>T>Wouldn't it be nice to have 400Hz or higher to play with! Recharge
>those
>T>caps every couple of milliseconds instead of every 16ms.
>T>DLH
>
> Mil. surplus 400-Hz. generators (and motor-generator sets) are
> available from time to time from the usual sources -- including
> "Cross Trade A Plane" since they are airborne equipment.
>
> In the same aviation vein, mil. surplus "ground power units"
> which are comprised of an air-cooled aircraft engine coupled
> to a 400-Hz generator are also available from aviation sur-
> plus dealers and turn up occasionally at amateur aviation
> swap meets/flea markets.
>
> Manufacturers of airborne electrical equipment require
> 400-Hz. power sources for development and testing purposes.
> Ergo, both rotary and solid-state 400-Hz power sources
> are readily available from commercial sources. Bring money.
> (A lot).
>
> "Freq-ing" out in --
> Detroit, USA
>
> Robert Michaels
>
We also use 400hz generators onboard ships in the Navy to supply
additonal
power to various systems in the combat information center, CIC. They are
driven by 450 volt 3-phase AC motors. I imagine even a surplus one of
those
would be a pretty penny.
Dave