A piece of apparatus used for reversing the direction of an electrical current; an attachment to certain electrical machines, by means of which alternating currents are made to be continuous or to have the same direction. It may be attached to the end of the spindle of an electric motor, where a brush is in contact sequentially with the parts of the spindle that conduct current to the different windings of the motor.
Mounted on the shaft of the armature, this element consists of segments or bars that are directly connected to the different phases of the motor windings. Brushes contact the bars and when the armature rotates, current is switched from one phase of the winding to the next.
Device used to change the direction of an electrical current. Alternately, a revolving part in a motor or dynamo that collects the current from or distributes it to the brushes.
the rotating contact on the motor's armature that transfers power from the motor brushes to the field coils.
A cylindrically shaped assembly that is fastened to the shaft of a motor or generator and is considered part of the armature assembly. It consists of segments of "bars" that are electrically connected to the two ends of one or more armature coils.
The rotating part of an electric motor which contacts stationary carbon brushes to complete the electrical circuit.
The rotating part of a DC generator.
mechanical device in a brushed DC motor that passes current from the brushes to the windings.
ring or similar object fixed to end of armature. Allows continuous contact with power source.
switch for reversing the direction of an electric current
a mechanical inverter, reversing the polarity of the windings as it switches
a multi-part cylinder made of copper which allows the brushes to pull energy from the coils only when they are in one position relative to the magnetic poles
a sliding contact that not only makes electrical contact with a rotating loop of wire but also allows the current direction to reverse every half-cycle of rotation
A segmented ring attached to one end of an armature in a motor, providing an electrical connection between the armature and brushes. It provides a direct current path to the armature.
A mechanical cylinder consisting of alternating segments of conductive and insulating material. This cylinder used in DC motors passes currents from the brushes into the rotor windings and performs motor commutation as the motor rotates.
is a device used to accomplish time-division multiplexing (TDM) by repetitive sequential switching.
A cylindrical device mounted on the armature shaft and consisting of a number of wedge-shaped copper segments arranged around the shaft (insulated from it and each other. The motor brushes ride on the periphery of the commutator and electrically connect and switch the armature coils to the power source.
A mounted cylindrical device, to which the motor brushes are attached, on the armature shaft made of copper segments set around the shaft.
A device for changing the direction of an electric current, especially for changing alternating current into direct current.
A mechanical device that reverses armature connections in motors and generators at the proper instant so that current continues to flow in only one direction. In effect, the commutator changes ac to dc.
The part of a DC motor armature that causes the electrical current to be switched to various armature windings. Properly sequenced switching creates the motor torque. The commutator also provides the means to transmit the electrical current to the moving armature through the brushes that ride on the commutator.
A device that changes AC current to DC.
A commutator is an electrical switch that periodically reverses the current in an electric motor or electrical generator. Commutators enable motors to run on, and generators to produce, direct current instead of alternating current. More generally, commutators can be used to convert between direct and alternating current.