Re: Sync Motor Wanted

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


These motors always sync at either true 90 degree (correct) position or 45
degrees off.  Flip the power switch on and off once or twice to let them
coast for 5-8 sec, then back on at 30% variac power and you are in sync.  If
you are not in sync you will know immediately by the length of the spark at
30% setting.

We've used dozens of these in 3-5 kVA coils and they work great using the
above procedure.  Try it and you will see what I mean.  They are easy to
synch with you finger on the on/off switch.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
 >
 > Are these motors you are currently offering true salient-pole synchronous
 > motors, or are they still the same motors you offered last year that were
 > NOT true salient pole motors? The 1/25 HP, 1800 RPM "synch motors" you
 > offered last year (Eastern Air Devices model H34BBM-8) turned out to be
 > hysteresis synchronous motors, and could start randomly at any one of
 > several possible rotor-housing alignments, requiring that power be cycled
on
 > and off until the correct angular alignment was eventually obtained. This
 > might be acceptable for some users for a low powered "hobby" coil, but for
 > many applications this "hit-or-miss" randomness was not acceptable.
 >
 > If you now have true salient-pole motors available, I'd like to return the
 > FOUR motors I bought (the hysteresis-synchronous motors, still sealed in
 > your original boxes) and trade them for the "real thing".
 >
 > Thanks!
 > Scott Hanson
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Wednesday, April 14, 2004 9:33 PM
 > Subject: Re: Sync Motor Wanted
 >
 >
 >  > Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net>
 >  >
 >  > I would think that if he is offering them for Tesla coil use that they
 > would
 >  > be salient pole and powerful enough for a SRSG... But 43$ is a tad more
 > then
 >  > I wanted to pay.   No one has any used ones?
 >  >
 >  > Regards - Jim Mitchell
 >  > ----- Original Message -----
 >  > From: "Tesla list" <tesla-at-pupman-dot-com>
 >  > To: <tesla-at-pupman-dot-com>
 >  > Sent: Thursday, April 15, 2004 12:20 AM
 >  > Subject: Re: Sync Motor Wanted
 >  >
 >  >
 >  >  > Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>
 >  >  >
 >  >  > Hi DC,
 >  >  >
 >  >  > Your's may not be salient pole though?  Also might not be very
powerful
 >  >  > depending on the rotor size?
 >  >  >
 >  >  > Cheers,
 >  >  >
 >  >  >          Terry
 >  >  >
 >  >  > At 09:55 PM 4/14/2004, you wrote:
 >  >  >
 >  >  > >Yes, I have some in stock.  1800 RPM at 120 VAC.  $35 plus $8.50
 >  > shipping.
 >  >  > >
 >  >  > >Dr. Resonance
 >  >  > >
 >  >  > >Resonance Research Corporation
 >  >  > >E11870 Shadylane Rd.
 >  >  > >Baraboo   WI   53913
 >  >  > >----- Original Message -----
 >  >  > >From: "Tesla list" <tesla-at-pupman-dot-com>
 >  >  > >To: <tesla-at-pupman-dot-com>
 >  >  > >Sent: Wednesday, April 14, 2004 5:37 PM
 >  >  > >Subject: Sync Motor Wanted
 >  >  > >
 >  >  > >
 >  >  > > > Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net>
 >  >  > > >
 >  >  > > > Hello list,
 >  >  > > >
 >  >  > > > Does anyone have a Sync. motor for sale suitable for a SRSG?  I
 > didn't
 >  >  > >have
 >  >  > > > any luck grinding flats into my motor,  it just searches for
sync
 > but
 >  > wont
 >  >  > > > lock on.
 >  >  > > >
 >  >  > > > Regards - Jim Mitchell
 >  >  > > >
 >  >  > > >
 >  >  > > >
 >
 >
 >