Commutator is a split ring which reverses the current .when the commutator turns around due to magnetic force and because of it even the current gets reversed
A switch that reverses the direction of the current in a motor is called a forward reverse drum switch. It is a single phase motor that turns from clockwise to counter clockwise.
The commutator is a rotating switch, which reverse the polarity of the generated voltage every half-cycle. So it acts to rectify the output voltage.
The commutator is part of the armature on a DC motor and this assembly is the rotating element of a motor.
Found one DC motor having small sparking,but the commutator is light and dark bar pattern.commutator is round. We 500kw dC motor operted at 500rpm with 480Amp's .The DC motor full load current is 1050Amp's. Why the commutator had small spaerking.
A series-wound commutator motor has the best starting torque because the torque is proportional to the square of the current, and the starting current is set by a current-limiting resistor which is switched out as the motor builds up speed.
commutator, armature
A commutator is an electrical switch that periodically reverses the current direction in an electric motor or electrical generator. A commutator is a common feature of direct current rotating machines.
The point is that, with a d.c. motor, we don't want the torque to reverse every half-revolution, if the motor is to continue running in the same direction. To achieve this, we use a split-ring commutator/brushes, which rotates with the armature coil. Essentially, a split-ring commutator has twofunctions: (1) to enable us to connect the rotating coil to an external supply circuit and (b) to act as a rotating switch, ensuring that the armature current always flows in the same direction relative to the motor's magnetic field. Thanks to (b), the machine will continue to rotate in the same direction.Without a split-ring commutator, after half a revolution, the armature current will reverse direction relative to the magnetic field, the torque will reverse, and the motor will reverse direction.
A switch that reverses the direction of the current in a motor is called a forward reverse drum switch. It is a single phase motor that turns from clockwise to counter clockwise.
The commutator and brushes...
The commutator is a rotating switch, which reverse the polarity of the generated voltage every half-cycle. So it acts to rectify the output voltage.
It generates a alternating current to keep the motor rotating in the same direction.
to make contact with the brushes and transfer the current to the appropiate windings in the armature.Another AnswerA commutator is a rotary reversing switch. It's function is to reverse the direction of the current through the rotor windings as they rotate, to ensure that the current direction around the windings remain in the same direction relative to the magnetic field, so that the torque always acts in the same direction.
The commutator is part of the armature on a DC motor and this assembly is the rotating element of a motor.
Found one DC motor having small sparking,but the commutator is light and dark bar pattern.commutator is round. We 500kw dC motor operted at 500rpm with 480Amp's .The DC motor full load current is 1050Amp's. Why the commutator had small spaerking.
A series-wound commutator motor has the best starting torque because the torque is proportional to the square of the current, and the starting current is set by a current-limiting resistor which is switched out as the motor builds up speed.
Commutator is a device in a motor through which supply is fed.