Slip ring - quick question regarding term

[low1]

Good morning.

I had a quick question regarding terminology. "Slip ring" is the term for the conductive rings mounted to the rotating assembly, correct? What is the proper term for the stationary ring to which the carbon brushes are attached? Someone mentioned "collector ring" but I think that is a synonym for slip ring.

Any help would be appreciated.

Thank you.

 

[jraef]

"Collector ring" is usually a term applied to the ring at each end of a rotor cage in a squirrel cage induction motor that connects the rotor bars together. Also called an "end ring". Slip ring is the correct term for the ring that the brushes touch on a wound rotor induction motor, which does NOT have a collector ring, because it has windings on the rotor, not rotor bars (hence the term "wound" rotor).


"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington

 

[low1]

Alright, so what is the term for the stationary ring to which the brushes are connected? I'm pretty sure it doesn't matter, but this is on a hydroelectric generating unit.

 

[ScottyUK]

Collector ring is synonymous with slipring in generator terms. Collector gear is synonymous with brushgear. If someone talks about endrings I usually assume they mean the alloy steel rings shrunk onto the rotor forging to retain the ductile copper rotor winding at the ends where it is not supported by the rotor slots. Without the endrings the rotor endwinding would disintegrate under centrifugal forces.

I'm not aware of a specific name for the stationary ring you refer to but I'm from a turbo-alternator background and the big low-speed salient pole machines are quite different in construction.

 

[crshears]

An old drawing I have said it's called a brush holder; if it was up to me, I'd call it a brush yoke.

Sorry I couldn't be of more help.

CR

"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

 

[waross]

I have always known the brush supporting mechanism together with the brush holders and the brushes as the Brush Gear.
Many machines have the brushes supported by rods or bars parallel to the shaft, rather than being supported by annular rings.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[low1]

Thanks everyone. I suppose that's why I couldn't find a technical term for it. We were just discussing meggaring a rotor in the shop, and there was some confusion with some of the junior staff about what were actually "slip rings". After explaining what the slip rings were, someone asked what the stationary ring was called.

 

[bohdand]

On a recent project for a hydro machine where GE provided it new, they called it the Brush Rigging.