Re: terminology help for newbie (pleeze<=)>

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

Original poster: "R Heidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

on 10/11/01 6:00 PM, Tesla list at tesla-at-pupman-dot-com wrote:

> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <jbdetails-at-prodigy-dot-net>
> 
> I am new to the technical side of electronics so sometimes terms
> used are a little confusing. Could someone possibly point me towards
> a web site or explain to me what "MOV, Coupling, KVA, and maybe
> somewhere that explains AC motor speed control. (specifically a 1/3hp
> AC motor that has windings around the rotor, no windings in the
> rotor, and doesn't require a capacitor)
> 
> Thanks, 
> Bob Bozarth
> 
> 
> 
COUPLING: THE MAGNETIC CONNECTION BETWEEN COILS.LOOSE HIGH LOSS OF MAGNETIC
ENERGY that is not felt by the secondary. This provides narrow band width.
TIGHT low loss magnetic connection with high power transphered to the
secondary, this also transpheres all harmonics wanted and unwanted.
   KVA: killo-volt-amp   (watts).    Motors are constructed in various ways,
some use coil stationaries, Perminate magnet stationaries. Multi phase icoil
stationaries. The rotar can be conctructed in like manner. AC motors may be
constructed with a solid or laminated iron core that uses an induced
magnetic field provided by the stator requiring no rotor power wires (most
common) and can be constructed or modified to be syncronous with the input
p0wer, that is in the same mecanical position with the same electrical phase
position every time it rotates. Some motors require a capasitor to shift the
phase of the incoming power to run a phase shifted coil with single phase
power. This is also required if you run a three phase motor on single phase
power. Motor speed control changes the rpm of a motor. This is commonly used
in variable speed electric drills and electric blenders.
   I hope this helps
       Robert H