In article ,
Gunner wrote:
On 25 Aug 2004 13:18:31 -0700, jim rozen
wrote:


You have to understand that most of the designs you
see are highly optimized. Using an oversized idler
motor that is started with a pony motor means you
don't need any power factor correction, no balancing,
and no starting circuitry.

It gets built for free, runs forever, and never
has to be thought about. Example is the patented
"jim's stone age converter" seen he

http://www.metalworking.com/DropBox/_2000_retired_files/Conv.jpg

Got a wiring diagram? Ive got a 20hp 3600rpm Western Electric waiting
to be turned into a RPC. Pony motors Ive got by the score.

*What* wiring diagram? Switch power to two windings of the
idler motor, and to the single-phase pony motor to spin it up, then
switch off the pony after it has thrown its belt. (Based on what I
remember of Jim's setup.) Wire the three windings of the idler to the
three inputs of the target tool.

You just need a larger idler than with a well tuned one, and
since you are not tuning for the power factor, you may blow circuit
breakers more often than you would like, depending on the size of the
idler motor.

You also might have problems running electronics from the
generated power if it is across the wild (generated) leg. If you can be
sure that all electronics are connected to the primary two input lines
from the power company, you should be fine.

Note, also, that this has *no* safety circuit to disconnect the
idler when the power fails, so when it comes back on, the motor will sit
there humming until it burns up, or trips the breaker. So *always* turn
it off when you walk away.

If *I* were going for a rotary, I would want the safety circuits,
self starting, and properly tuned to reduce the reactive current drawn
from the wall.

Enjoy,
DoN.

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