From: Jim Pennino
Subject: Re: (Avionics) How can this circuit produce an "inductive surge"?
Date: Mon, 30 Sep 2002 05:10:32 +0000 (UTC)
Organization: Special Solutions, LLC
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com>
NNTP-Posting-Date: Mon, 30 Sep 2002 05:10:32 +0000 (UTC)
User-Agent: tin/1.4.5-20010409 ("One More Nightmare") (UNIX) (SunOS/5.9 (sun4u))
In rec.aviation.owning Tarver Engineering wrote:
> "Peter Gottlieb" wrote in message
>> "Tarver Engineering" wrote in message
>> > > >
>> > > > You do know that floresent ligting is far harder on an UPS than an
>> > induction
>> > > > motor, do you not?
>> > > >
>> > >
>> > > So what? These are all 4 quadrant units. I use fl lighting on a UPS
>> > > emergency lighting, much more efficient than incandescent. I didn't
>> > the
>> > > series motor was the *only* test, did I?
>> > Well really, we were running big motor generator sets, to make 400
>> > (or 408 HZ IBM), off UPS 20 years ago. Running a motor with an UPS is
>> > hardly an accomplishment.
>> > To make the any load claim you would have to be able to drive all
>> > lights.
>> Why would you run a static inverter to make one frequency of AC then use a
>> MG set to convert to another frequency?
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 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
>> Seems like a real kludge to me,
>> not to mention, a very noisy setup.
> No, it was the only game in town.
>> You must not have been torturing with the correct motors. A series wound
>> AC-DC motor with its brushes is much nastier than flourescent or HID
>> lighting. "You do know that, do you not?" Try it, but watch the
>> MOVs and FETs!
> You are mistaken.