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From: "Tarver Engineering"
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com>
Subject: Re: (Avionics) How can this circuit produce an "inductive surge"?
Date: Mon, 30 Sep 2002 14:22:38 -0700
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
"Jim Pennino" wrote in message
> In rec.aviation.owning Tarver Engineering wrote:
> > "Peter Gottlieb" wrote in message
> > news:CLOl9.16392$CN2.firstname.lastname@example.org...
> >> "Tarver Engineering" wrote in message
> >> news:email@example.com...
> >> > > >
> >> > > > You do know that floresent ligting is far harder on an UPS than
> >> > induction
> >> > > > motor, do you not?
> >> > > >
> >> > >
> >> > > So what? These are all 4 quadrant units. I use fl lighting on a
> >> for
> >> > > emergency lighting, much more efficient than incandescent. I
> > say
> >> > the
> >> > > series motor was the *only* test, did I?
> >> >
> >> > Well really, we were running big motor generator sets, to make 400
> > cycles
> >> > (or 408 HZ IBM), off UPS 20 years ago. Running a motor with an UPS
> >> > hardly an accomplishment.
> >> >
> >> > To make the any load claim you would have to be able to drive all
> >> floresent
> >> > lights.
> >> Why would you run a static inverter to make one frequency of AC then
> >> MG set to convert to another frequency?
> > Isolation.
> Prey tell me how any electrical noise on the input to the motor can
> be transmitted across the steel shaft driving the generator or how
> input variations escape the inertia of the big flywheel on such a setup?
> The metrology lab in a place I worked a few years back had a pair of
> such beasts, one 60 Hz and one 400 Hz. We used battery powered test
> equipment to verify the outputs. REALLY clean output.
The 400 cycle UPS had just begun to replace some motor generators 20 years
> The only reason I can see for driving with a UPS is if you are running
> a long, one chance at it, experiment that can not interrupted until
> it finishes.
You mean like batch?
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