Slip ring
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A slip ring or collector ring is an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure. A slip ring can be used in any elec
Slip rings on a hydroelectric generator: A - stationary spring-loaded graphite brushes B - rotating steel contact ring C - insulated connections to generator field winding D - top end of generator shaft
The two most common types of slip ring
Field coil
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A field coil is an electromagnet used to generate a magnetic field in an electro-magnetic machine, typically a rotating electrical machine such as a motor or generator. It consists of a coil of wire t
Modern (c. 2009) low-cost universal motor, from a vacuum cleaner. Field windings are dark copper colored, toward the back, on both sides. The rotor's laminated core is gray metallic, with dark slots for winding the coils. The commutator (partly hidden) has become dark from use; it's toward the front. The large brown molded-plastic piece in the foreground supports the brush guides and brushes (both sides), as well as the front motor bearing.
Salient field bipolar generator
Consequent field bipolar generator
Consequent field, four-pole, shunt-wound DC generator