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Re: Rotary gap speed and type

Original poster: FutureT@xxxxxxx In a message dated 5/24/06 8:11:44 PM Eastern Daylight Time, tesla@xxxxxxxxxx writes:

Original poster: "MakingLightning" <MakingLightning@xxxxxxxxxxx>

  1725 & 3450 rpm motors and their sparks were just brought up,
noting that the 3450 gave more exciting and violent sparks. I am
assuming these are SYNC type of systems?


The systems mentioned above are not synchronous systems.
They are async.

How do those compare to using an ASYNC system running at various speeds?

There's not a lot of difference in output sparks or performance in general
for sync vs. async operation.  Sync happens to work out well with
small NST powered systems because it can utilize the NST to best
effect.  Sync is most important at low breakrates such as 120 BPS
which is good for such NST systems.  Sync motors will operate
at exactly 1800 or 3600 rpm.  Normal 1725 and 3450 rpm induction
motors can be modified by grinding flats onto the armature to
make them run synchronously.  For a given coil, low BPS operation
will require a larger value capacitor than high BPS operation for a given
power throughput.


There must be some people here that have had the same system used
with the 2 different types of RSG, and have noted the differences.