Selsyns
Selsyns
(OP)
Anybody rememer 'selsyns'? The little synchronous motors made by GE used to transmit position or torque to another device (ie another synchronous motor so both would be in same position). Anyway I have dug up some info on these and heard claims that there is a product that accepts the signal (position) of these little guys to display the position on something more modern. I do not claim to understand these entirely but I gather they have 3 windings and hence 3 signal wires to be sent to another motor to properly position the motor. I am trying to find the device that accepts this position signal (3 wires) and displays it in a digital format. Anyone help?
GE site has some info and maybe they make a digital display but I was not able to find such an animal. If no luck here, I will have to call them (hate calling into GE's web of phones). Thanks
GE site has some info and maybe they make a digital display but I was not able to find such an animal. If no luck here, I will have to call them (hate calling into GE's web of phones). Thanks





RE: Selsyns
<nbucska@pcperipherals.com>
RE: Selsyns
I will likely change out all these dated systems. Just now sure how quickly. I will replace them with absolute resolvers.
RE: Selsyns
Long Shot — Try www.slosyn.com/
RE: Selsyns
1.) using 0-cross detector and high frequency counter.
Use the 3 input phases as reference and convert these
and the secondary to logic level square- wave.
You may improve accuracy by filtering the inputs.
2.) Use one or more analog multiplier(s), multiply the secondary with a phase used as reference, integrate for one period and convert it do digital.
<nbucska@pcperipherals.com>
RE: Selsyns
I did find this link after posting my original post that makes me hopeful there is a digital display. It also has some dwg's of what is going on. Although, it is concerned with torque, I beleive most principles apply.
http://gess.ge.com/docs/4-8.PDF
Thanks
RE: Selsyns
know if yours is single or dual speed. I think below is a company that sells them as plug ins for a computer.
http://www.naii.com/
RE: Selsyns
RE: Selsyns
RE: Selsyns
www.intelcon.com/products/prs/1250.htm
The 1250 device is exactly what you want.
RE: Selsyns
and as you said three distibuted coils on the stator connected in star with the other ends brought out to terminals.
A Ac volage was applied to the rotor which induced voltage in the stator. The Amount of voltage induced in each stator
winding being proportional to the rotor position.
If you conected the stator windings of one selsyn to the stator of another selsyn and then applied voltage to both
selsyn rotors the shaft of the remote selsyn would follow
any movement of local selsyn
RE: Selsyns
http://www.warships1.com/index_tech/tech-051.htm
TTFN
RE: Selsyns
BEI MOTION SYSTEMS 2111 Palomar Airport Road Carlsbad, CA 92009, USA
Website is:
http://www.pamir.com/manufacturers/manufacturers.cfm?ID=12
and
http://www.eugeneleeslover.com/SELSYN-SYNCHRO.html
RE: Selsyns
Selsyn is a trademark name used by GE to describe a synchro as suggested by IR.
RE: Selsyns
http://www.thomasregister.com
and type Synchros under Product or Service, which will return 16 companies to approach to