[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TCML] NST's and ARSG's

My rotor weighs nothing, it's made from a polyethelene cutting board.
I have eight 1" brass bolts with acorn nuts.  I just don't have enough
load for the speed to vary with voltage.  The gap has very poor
quenching for a rotary gap.  If I run the coil for any more than than
a minute I have to break out the shop vac and turn it into a rotary
sucker gap.  At any rate, I'm getting rid of the gap for a
synchronous, or I have a vacuum motor for a sucker gap.

On Wed, Jun 11, 2008 at 7:30 PM,  <FutureT@xxxxxxx> wrote:
> In a message dated 6/11/2008 7:21:26 P.M. US Eastern Standard Time,
> pslawinski@xxxxxxxxx writes:
>>This is what I'm describing.
>>Sadly, my motor's speed  does not vary at all with voltage, unless the
>>voltage is so low that  the rotor will not spin.
> --------
> I assume then that you tried varying the speed using a variac?  If  the
> speed doesn't vary at all, then you must have a rather powerful  motor
> relative to the rotor diameter.  Such a situation makes the  speed
> relatively unresponsive to voltage changes.  Although induction  motor
> speed is considered to be rather independent of voltage, a heavily
> loaded motor will react to a change in voltage with a change in  speed.
> It can be helpful also to lower the voltage after getting the motor  to
> spin up.  A lower voltage which can keep the motor spinning,  may
> be too low to start the motor.  It's best to start the motor at full  voltage,
> then lower it carefully, while monitoring the coil's operation for
> elimination of the unwanted surging, pulsing effect.
> If none of this works, then you need a variable speed motor, or  change
> the number of electrodes, or use a heavier rotor with more air  resistance,
> or use a weaker induction motor, or use a special motor controller,  or
> use a belt drive with pulleys, etc.
> Cheers,
> John
> **************Vote for your city's best dining and nightlife. City's Best
> 2008.      (http://citysbest.aol.com?ncid=aolacg00050000000102)
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
Tesla mailing list