Re: ARSG Motors (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 26 Aug 2007 12:18:35 -0500
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: ARSG Motors (fwd)


Sometimes in the past we have used these 10,000 rpm motors.  For cooling, 
they like to be run at full speed.  We just used pillow blocks and a belt 
drive and pulleys to get the reduction down to 3,000 RPM.



Dr. Resonance


Resonance Research Corp.
www.resonanceresearch.com


----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, August 25, 2007 2:59 PM
Subject: Re: ARSG Motors (fwd)


>
> ---------- Forwarded message ----------
> Date: Sat, 25 Aug 2007 19:57:44 +0000
> From: David Rieben <drieben@xxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Cc: drieben@xxxxxxxxxxx
> Subject: Re: ARSG Motors (fwd)
>
> Hi Chris,
>
> Most asynch rotary gap coilers get excellent results with 300 to 500
> BPS. With a disc with 8 flying electrodes, 3600 RPMs would yield
> 480 BPS. I have seen some ARSGs that are set up with 10,000 RPM
> universal drive motors but their input voltage is almost always "toned
> down" with a variac and most seldom run their RSG at the full rated
> 10,000 RPMs. My ARSG on my Green Monster coil only goes up
> to 3500 RPMs with a treadmill motor and 8 flying electrodes and that
> is plenty fast as I usually get the best results wiht the speed control
> variac set around 75 to 80 on the 0 -100 dial. Of course, with a
> SRSG, you want a break rate that's a direct multiple of the 60 hz
> (50 hz for those coilers across the big pond) of the mains power supply
> (usually 120 or 240 BPS for 60 hz , 100 or 200 BPS for 50 hz).
>
> If the BPS get's too high, the transformer dosen't have enough time
> to fully charge the primary capacitor between each bang and therefore
> each bang will fire at a reduced voltage. I'm sure others can explain the
> theory better but there's a point where the reduced capacitor discharge
> voltage is no longer able to keep extending the ionized path and from
> that point on, the sparks will get shorter, not longer, with additional 
> in-
> crease in the BPS.
>
> Also, the centrifugal and vibrational forces on the rotary disc will 
> increase
> as the square of the RPMs, so running relatively high RPMs (>5000) on any
> homemade disc, other than a very precision made, professionally  machined
> one, can be quite dangerous.
>
>
> David Rieben
>
> -------------- Original message -------------- 
> From: "Tesla list" <tesla@xxxxxxxxxx>
>
>>
>> ---------- Forwarded message ---------- 
>> Date: Fri, 24 Aug 2007 10:39:45 -0500
>> From: Crispy
>> To: Tesla list
>> Subject: Re: ARSG Motors (fwd)
>>
>> What is "too fast" for an ARSG? Is it just power consumption, or is
>> there another issue? I may be wrong, but it seems to be that the faster
>> the speed on the ARSG, the more frequent bangs, and the better old
>> ionized trails help new sparks extend to new lengths by being allowed
>> less time to dissipate.
>>
>> Chris
>>
>> On Fri, 2007-08-24 at 06:42 -0600, Tesla list wrote:
>> > ---------- Forwarded message ---------- 
>> > Date: Fri, 24 Aug 2007 15:11:19 +0930
>> > From: The Engine Centre
>> > To: Tesla list
>> > Subject: Re: ARSG Motors (fwd)
>> >
>> > A washing machine, spin motor or a main motor, most are universal brush
>> > motors,they are easy to get and cheap, i have one which runs 13000 no 
>> > load,
>> > which is far too fast BUT with a small variac you can control the speed 
>> > to
>> > what ever you want.
>> > Paul,--- Original Message ----- 
>> > From: "Tesla list"
>> > To:
>> > Sent: Friday, August 24, 2007 12:34 PM
>> > Subject: ARSG Motors (fwd)
>> >
>> >
>> > >
>> > > ---------- Forwarded message ---------- 
>> > > Date: Thu, 23 Aug 2007 21:51:14 -0500
>> > > From: Crispy
>> > > To: tesla@xxxxxxxxxx
>> > > Subject: ARSG Motors
>> > >
>> > > Hello,
>> > >
>> > > Can anyone suggest reasonably fast (10000rpm+) and cheap motors for
>> > > building a propeller-type ARSG? I found some very cheap angle 
>> > > grinders
>> > > ($5 a piece, $15 shipping, 11000rpm) on ebay, but they use 600W, 
>> > > which
>> > > is more than I can support. The motor doesn't have to be that cheap
>> > > either. The imposed total limit is 800W, and the power supply will be 
>> > > a
>> > > 12/30 NST (360W). Thanks a lot.
>> > >
>> > > Chris
>> > >
>> > >
>> > >
>> >
>> >
>> >
>>
>>
>>
>
>
>