Re: MOTs & Thoughts

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Crow Leader by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla-at-lists.symmetric-dot-net>

I want to see the voltage and current waveforms of these so called
"saturated" transformers. Show me clipped output voltage waveforms at no
load.

do these "saturated" transformers dissipate 600 watts of heat?

KEN


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, July 22, 2002 5:38 PM
Subject: Re: MOTs & Thoughts


> Original poster: "Marry Krutsch by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>
>
> Hi Tim, all,
>
> I'm not sure about your MOT, but all of mine are partially saturated at
> 120 volts.  They start to vibrate, and the primary no-load current goes
> up to between 2 and 4 amps, depending on the unit being tested.  I have
> graphed the no-load current vs input voltage, and the graph stays linear
> until 90 volts, then begins rising exponentially after that.  I have 5
> MOTs, each differing in size/output, and they all begin to saturate with
> 90 volts in.  The input current really begins to take off at 100 volts
> in.  I wish I had a transformer like yours :-).
>
> Peace,
> Winston K.
>
> PS- If anyone is interested (let me know), I can send you a copy of my
> measurements, complete with graphs (they look cool :-)).  It's done in
> Excel.
>
> "Marry Krutsch" <u236-at-earthlink-dot-net>
>
>
>
> Tesla list wrote:
> >
> > Original poster: "Tim J by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <digital_raven45-at-hotmail-dot-com>
> >
> > I have to agree with KEN on this one!
> >
> > MOT's DON'T saturate at 120VAC...it wouldn't make sense if they did.
> > Personally, I've done tests to 160 VAC on a 120 VAC rated MOT, and that
was
> > the absolute max I could push the transformer before I started hearing a
> > loud buzz...peak output voltage/ current began to drop off like crazy.
Now
> > that was a classic case of saturation. This did not happen at 120 VAC or
140
> > VAC...I can assure you.
>
>
>
>