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How a Slip Rings Works

From Electro-Miniatures Corporation
 

 

A slip ring is a rotary coupling used to transfer electric current from a stationary unit to a rotating unit. This is accomplished by either (1) holding the center core stationary while the brushes and housing rotate around it, or (2) holding the brushes and housing stationary while the center core is allowed to rotate.

The example shown below is the more common “drum” rotor design. The rotor, A, is typically the inner portion of the slip ring while the stator - the stationary portion, is the outer portion. The slip ring has a Silver Graphite composite brush, B, on a Silver surfaced ring, which is typically used for power transmission. The same construction method is used for signal circuits. For these applications, generally a Gold-on-Gold wiper/ring combination is used. Either method provides low dynamic resistance minimizing circuit noise into the 5 milliohm range.

Product Announcements
Schleifring und Apparatebau GmbH - Custom Slip Rings
The slip ring is an essential device which facilitates the supply of power, the transmission of electrical signals from even for high frequency as well as microwave, Databus and optical signals as... (read more)
Aeroflex Airflyte - CAY-125 / CAY-755
Cartridge Brushes, 1.0" Thru Bore, Strain Gauges, Thermocouples... (read more)
Schleifring und Apparatebau GmbH - Standard Series K
Several standard contact configurations and numerous transmission channels guarantee greatest flexibility for many demanding rotating applications. Modified designs or optional features are possible... (read more)
Moog Components Group - Slip Ring Series with Through-Bore Design
Moog Components Group offers a complete line of slip rings that provide solutions for moving data and power from a stationary structure to a rotating device. The company has recently added a new... (read more)
Fabricast, Inc. - .50 Inch Bore Separate Rotor/Brush Block Assembly
The .50 Inch Bore Separate Rotor & Brush Block Assemblies are available with up to 24 rings and manufactured with Solid Coin Silver Rings and Silver Graphite Brushes. These economical, high... (read more)
Fabricast, Inc. - 2.00 Inch Bore Separate Rotor/Brush Block Assembly
The 2.00 Inch Bore Separate Rotor & Brush Block Assemblies are available with up to 12 rings and manufactured with Solid Coin Silver Rings and Silver Graphite Brushes. These economical, high... (read more)
Fabricast, Inc. - .50 Inch Bore Self Contained Stock Assembly
The .50 Inch Bore Self Contained Stock Assemblies are available with up to 24 rings and manufactured with Solid Coin Silver Rings and Silver Graphite Brushes. These economical, high quality Slip Ring... (read more)
Fabricast, Inc. - 1.00 Inch Bore Self Contained Stock Assembly
The 1.00 Inch Bore Self Contained Stock Assemblies are available with up to 24 rings and manufactured with Solid Coin Silver Rings and Silver Graphite Brushes. These economical, high quality Slip Ring... (read more)
Fabricast, Inc. - 1.50 Inch Bore Self Contained Stock Assembly
The 1.50 Inch Bore Self Contained Stock Assemblies are available with up to 24 rings and manufactured with Solid Coin Silver Rings and Silver Graphite Brushes. These economical, high quality Slip Ring... (read more)
 
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