Re: Eastern Air Devices Sync Motors

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

Original poster: "Harold Weiss" <hweiss-at-new.rr-dot-com> 

Hi Ken,

These heatsinks wrap around the motor and secure with hose clamps.  I don't
think it will need a fan then.  I was always taught that if it runs hot, it
needs to be uprated.  I think the motor was intended to run fans, and that
that would help cool the motor, and the internal fan would just take care of
a hot spot.  That's probably why they run hot in SRSG use.

David E Weiss

 > Original poster: "Crow Leader" <tesla-at-lists.symmetric-dot-net>
 >
 > Hello,
 >
 > It's good to the motor has a wonderful new home.
 >
 > I found a small square cooling fan kept the temp down too. The internal
 > "fan" seemed pretty worthless
 >
 > KEN
 >
 >  > Original poster: "Harold Weiss" <hweiss-at-new.rr-dot-com>
 >  >
 >  > Hi All,
 >  >
 >  > For those that have the 1/20 HP Eastern Air Devices hysterisis sync
 >  > motors.  I have noticed with mine that they run hot.  I have a
 >  > solution!  Wicks Aircraft Supply has a engine oil filter heatsink.
This
 >  > heatsink has a 3 5/8" bore and two lengths available, 3 5/8" and 4
 >  > 5/8".  From the website it also comes with a couple of hose clamps to
 >  > secure it.  Part numbers are CC109 for the 4 5/8" length and CC110 for
the
 >  > 3 5/8" length.  Price is $32.99 for each model.  With a little heatsink
 >  > grease these should keep those motors running cooler.
 >  >
 >  > Also, these motors do work with the J.F. phase controller.  With the
 > motors
 >  > 4uF run cap, 7.5A Powerstat 116, and 40uf cap, I can get about 45
degrees
 >  > of shift before the votlage drops the motor out of sync at around
 >  > 50-60V.  I am looking at increasing the cap size, as the peak seems to
be
 >  > at the start of the windings for the variac.  They are a bit of a pain
as
 >  > they don't always come up right, but seem ok once they get dialed in.
 > They
 >  > also seem not to sync right away with the phase controller.  It takes
 > about
 >  > a second or two to run up and lock.
 >  >
 >  > David E Weiss