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Re: Rotary Sync Gap
Hi Terry,
You could look at using an opto-interrupter with markings
on the disk. Both light and signals could be fed to and from with
complete isolation. You could also use optical feedback from the
stationary electrode and compare that with the mains waveform. I am
planning to use some of these ideas in various ways at some stage.
Malcolm
> Original Poster: Terry Fritz <terryf-at-verinet-dot-com>
>
> Hi All,
>
> I finally got my new synchronous rotary gap together and hooked it up.
> The results were dramatic. My coil's streamers were much better, longer,
> etc. There is no comparison to even my best static gaps. The performance
> is far superior.
> I looked at the output on the scope and there was no quenching to be
found
> (sorry no pics yet). The power bounced back and forth from the primary to
> the secondary several times. The voltage at breakout was a little better
> at around 230kV. The rotary seems to provide a very stable and controlled
> spark which feeds the streamers very well.
> I'll study all this much more in the near future. The points of the gap
> are 3/8 inch brass all thread sections that seem to burn fairly clean.
> They stay very cool in the considerable air flow. The rotor balance is not
> perfect but the frame is pretty strong and it is not serious. These do
> take considerable skill and equipment to build.
> I do have one question. Is there a way to hook up a neon lamp, high
> brightness LED, etc. to shine on the rotor to indicate were in the ac
> cycle the rotor is at. In other words, I am trying to get the gap points
> to line up at the peak of the AC cycle. There must be some simple device
> to do this. I do have a nice inductive timing light that may be a
> possibility too. With my voltage probe down I can't see the cap voltage
> directly.
>
> Terry Fritz
>
>
>