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What is commutator and how it works?
The commutator assures that the current from the generator always flows in one direction. On DC and most AC motors the purpose of the commutator is to insure that the current flowing through the rotor windings is always in the same direction, and the proper coil on the rotor is energized in respect to the field coils.
What is the function of commutator in?
The function of commutator ring in an electric motor is to reverse the direction of current flowing through the coil every time coil just passes the vertical position during a revolution. Hence as the direction of the current is reversed, the torque is changed in the direction.
What is the commutation process?
Commutation in DC machines is the process by which the reversal of current takes place. In DC generator this process is used to convert the induced AC in the conductors to a DC output. In DC motors commutation is used to reverse the directions of DC current before being applied to the coils of the motor.
What does a commutator look like?
The commutator itself is a split ring, typically made of copper, with each segment of the ring attached to each end of the armature coil. If the armature has multiple coils, the commutator will similarly have multiple segments—one for each end of each coil.
What is bad commutation?
A machine is said to have poor or bad commutation if there is sparking at the brushes and commutator surface . the bad commutation may be caused by mechanical or electrical conditions. The mechanical conditions include uneven commutator surface non uniform brush pressure, vibration of brushes in the brush holders etc.
How is a commutator made?
What is the function of a commutator?
Answer / vindhya vasini. the function of commutator is to lead current from external stationary leads to the rotating coils of the armature winding in case of motor and to draw current from armature winding to external circuit in case of generator.
What are the uses of commutator?
A commutator is a rotary electrical switch that periodically reverses the direction of the current between the rotor and the external circuit. The commutator was discovered by William Ritchie and Hippolyte Pixii in 1832. Commutators are used in DC machines ( DC motors and DC generators) as well as in universal motors .
What is the purpose of a commutator in motor?
The commutator of a DC motor is a cylindrical structure that is made of copper segments stacked together but insulated from each other using mica. The primary function of a commutator is to supply electrical current to the armature winding. The brushes of a DC motor are made with graphite and carbon structure.
What does commutator do in an AC motor?
On DC and most AC motors the purpose of the commutator is to insure that the current flowing through the rotor windings is always in the same direction, and the proper coil on the rotor is energized in respect to the field coils.