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RE: RSG


From: 	Bert Hickman[SMTP:bert.hickman-at-aquila-dot-com]
Reply To: 	bert.hickman-at-aquila-dot-com
Sent: 	Monday, November 24, 1997 8:30 AM
To: 	Tesla List
Subject: 	Re: RSG

Tesla List wrote:
> 
> From:   Barton B. Anderson[SMTP:mopar-at-mn.uswest-dot-net]
> Sent:   Saturday, November 22, 1997 5:36 AM
> To:     Tesla List
> Subject:        RSG
> 
> I'm designing a RSG. Consider this:
> Pulley driven shaft (in a 4 x 8 inch all aluminum housing) with a 9 inch
> aluminum flywheel (the housing, flywheel, and shaft are the same
> electrically). Electrode heat dissipation on this setup should not be a
> problem. The shaft is driven from a round belt (a polyethylene material
> which is strong, orange in color, non-conductive). I have driven the
> flywheel and shaft with this belt and it works great. 1/3HP AC motor at
> 1800rpm. (electrically/physically isolated from the flywheel shaft).
> 
> First:
> I was considering 4 electrodes and two stationary gaps (now one
> stationary). I am now considering 8 electrodes to bring the bps to 240
> instead of 120. I've tried the RotJit program, but it doesn't allow an 8
> electrode case. Is there any real reason to do this (or something else)?
> 
> Second:
> Two stationary gaps appeared unnecessary. Since the housing is
> electrically connected to the flywheel, I can make a permanent
> connection to the flywheel (so to speak via the housing) leaving a
> simple single stationary gap for adjustment. Gotta work great, right?
> 
> Bart Anderson
> "freez'in in Minnesota"

Bart,

Don't ever try running tank current through the bearings - they will
internally arc-erode and prematurely fail! Also, is the motor
synchronous (exactly 1800 RMP) or is it simply an regular induction
motor (1725 RPM)? If the latter, you may want to consider using a
smaller diameter pulley on the rotary gap side to step up the rotor
velocity in addition to going with 8 points so that you can get maximum
breakrates in the 360 - 480 BPS range. By connecting to more/fewer
electrodes, you can then adjust the breakrate you want in finite
increments. Fewer breaks/second may lead to phasing problems ("beating")
between the incoming AC power and the "slipping" rotor speed of the
induction motor.

Safe gappin' to you!

-- Bert --