Re: Sync vs. Async

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Matt,

Since the motor and the charging frequency vary by ~2.5Hz, your gap will go
in and out of the "sweet spot" creating sort of a wooowooowooowooo sound.
The efficiency is only about 50% of what a sync gap would be.  So it would
be nice if your motor was converted to a sync type ;-)

http://hot-streamer-dot-com/TeslaCoils/Misc/syncmot.zip

However, you can always just put a regular static gap in parallel with the
rotary gap and that will protect every thing.  If the rotary gap misses,
the static gap will fire.  The MMC current may be a little higher but the
big Geek caps won't care.

Cheers,

	Terry


At 10:10 PM 6/17/2001 -0400, you wrote:
>Hi All,
>
>I am trying to build a rotory gap for my 1kw coil. Several people have told 
>me that I need a sync gap to keep my caps from dying because of 
>overcharging. I have SW caps right now and I'd have to push them to 40kV 
>before they show any sign of stress, so thats not a problem. But come 2 
>weeks from now I'm going to have a Geek MMC. Now I don't want this $60 MMC 
>to die because of my RSG. I need to know if I need exact BPS or real close 
>to it.
>
>Soooooooo, Whats the difference?
>
>The specs on my motor are as follows:
>
>1725 RPM
>1/4 HP
>Itsa GE dryer motor
>
>I calculated that flying electrodes will give me almost exactly 120BPS.
>
>
>Thanks,
>Matt Shayka
>
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