3hp 115V Universal motor? What is starting torque?

[skrab]

I have a 3hp 1800Rpm 28amp 115VAC slip-ring type motor that I believe is a universal motor (3 wires marked CW, CCW and unmarked, no caps required, speed is proportional to voltage.) Nameplate says DYNA motor corp, Dayton Ohio.

This motor was un-earthed from the obsolete motor bin. My guess is that it is 15-20 years old. I have never seen a universal motor this large. I would like to know the starting torque characteristics. If anyone has a source for motor data, I would appreciate if you would post. Any information would be helpful.

Thanks to all who respond.

 

[jbartos]

Suggestion: Please, would you clarify the slip rings versus the commutator? The universal motor uses the commutator that is similar to the dc motor, perhaps somewhat bigger. The slip rings are used by wound rotor induction motors. There is a big difference between those two.

 

[Marke]

I wonder if this is actually a schrage motor?
AC to both stator and rotor via a comutator.
Best regards,

Mark Empson

http://www.lmphotonics.com

 

[skrab]

I finally got a chance to look at the motor. It is powered
via commutator. Also of note, this 3hp motor weighs approx 75lb and is built in a 215 frame. It is single voltage, single phase 115v.

thanks in advance
please more info on schrage motor, I've never heard that term.
joe

 

[SteveKW]

What you have is an externally reverible Repulsion motor.

 

[SteveKW]

An externally or electrically reversible Repulsion motor has high starting torque and variable speed capability. Compared to a capacitor start motor, it has a low starting current.

 

[jbartos]

Suggestion: Visit

http://www.thomasregister.com

and type Motors: Universal under Product or Service, which will return 41 companies to inquire about the universal motor parameters
also, visit

http://www.meatesting.com/mtsys.htm#1

for universal motor characteristics

 

[jbartos]

Suggestion: Visit

http://www.emona.com.au/catalogue/E15.html

for Schrage motor