Re: ASRG & DC power oddity

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

Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>" <youngs-at-konnections-dot-net>

You are hearing the 60 Hz hum from vibrating windings or laminations and the
57.5 RPS repetitive motor noise beating with each other.
--Steve

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, January 27, 2002 2:12 PM
Subject: Re: ASRG & DC power oddity


> Original poster: "J. B. Weazle McCreath by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <weazle-at-hurontel.on.ca>
>
>
> At 12:12 PM 27/01/02 -0700, you wrote:
>
> >Original poster: "Christopher Boden by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <chrisboden-at-hotmail-dot-com>
> >
> >I'll take a stab at this :)
> >
> >If you play with a ASRG that is being spun by a DC motor this becomes
> >evident very quickly.
> >
> >What's happening is you're cycleing through the various points of the AC
> >waveform slowly. If you use a DC motor where you can accurately vary the
> >speed (I use motors from old IBM tape drives, rated 34VDC nominal and
will
> >spin all day long at 2VDC to 50VDC). Because the instantanious voltage at
> >any given moment in time can be anywhere from 0 to 120V as your gap fires
in
> >close alignment to the waveform you're getting different voltages.
> >
> >With a perfectly synced motor you can just as easly have electrode
> >presentations happen at 0VDC as at the maximum. It's just a matter of
> >turning the motor housing :)
> >
> >This means that it IS possible to have a SRSG aligned to a point where
> >everything is set up perfectly, and full power is applied to the coil,
and
> >NOTHING happens because when the gap comes into alignment the electrodes
are
> >at 0V....at least in theory. I've done this with just a transformer, but
not
> >in a tank circuit (as it's deadly to the transformer).
> >
> >Because you're ASRG is *close* to the sync speed, but not dead-on, your
> >electrodes are coming into alignment at a slightly different point in
each
> >succsessive wave of the AC input cycle. Thus, you've created the Beat
> >Frequency effect :)
> >
> >Get it? It's really hard to explain, it's one of those...you gotta get
the
> >feel of it things. :)
> >
> >Now I'm going to go take advantage of the milder weather....but not by
> >coiling.....I'm going STREET LUGEING! :) ha ha ha ha ha ha............
> >
> >duck
> >
>
> Hello Duck, Coilers,
>
> Your explanation makes perfect sense, but you didn't answer my question
> as to why the motor makes this beating noise.  It does it even without
> the high voltage supply turned on, making me think there's something a
> bit amiss with the motor.  I mentioned the business about noticing the
> arcs varying just as a passing comment, as it's doing exactly what you
> said it would.  It's the motor hunting all by itself that I'm wondering
> all about.  Thanks in any case!
>
> 73, Weazle, VE3EAR/VE3WZL
>
> Listening: 147.030+ and 442.075+
> E-mail:    weazle-at-hurontel.on.ca
>            or ve3ear-at-rac.ca
> Web site:  http://www.hurontel.on.ca/~weazle
>
>
>