What will happen if commutator is not used in a DC motor?
Well, without commutator, the machine will not develop a unidirectional torque and motoring action will not take place. In a DC motor, at the instant when armature coil passes through magnetic neutral axis, current in armature coil must reverse to maintain torque in the same direction.
What will happen if no commutator is used in DC generator explain?
Without a split ring commutator the current would not reverse when armature reverses, and the magnetic fields of the rotor and stator would clash and the rotor will stick in a position and not turn.
Why does a DC motor need a commutator?
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 happens if a DC motor does not have a split ring commutator?
In a DC motor, if we don’t use split ring commutator, the coil becomes stuck in vertical position, why is that? – Quora. With DC electric current, the polarity determines the North/South orientation of the magnetic field produced by the armature winding (coil of wire).
What is the function of commutator?
A commutator is a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit.
Can dc motor run without commutator?
Can a DC motor run without a commutator? – Quora. No, a direct current motor cannot run without a commutator because there is no induced electromotive force inside the armature. The commutator plays the function of supplying current to the armature from the brush.
What is the function of commutator Class 10?
Answer: The function of commutator or slip ring is to change the direction of current through the coil after every half rotation.
What is the function of commutator in DC motor Mcq?
Commutator is used as mechanical rectifier in DC machines. It converts AC armature current in to DC current. Commutator is used to convert AC current into DC current.
Why commutator is not full ring?
The split in the commutator ring is not just to break or connect the circuit. It’s also to define the direction of current through the wire windings, thereby generating a magnetic field. If there weren’t two gaps, the current would not flow through the wire windings.
Why do we need a split ring commutator?
Summary points: split-ring commutators reverse the direction of the current in the coil each half turn. This allows the motor coil to rotate continuously in one direction.
Why does an AC motor not need a commutator?
In AC induction motor, two windings in stator create a rotating magnetic field, which makes the rotor rotate. So there is no need of supply to rotor and hence no commutator.
What are the functions of commutator in a DC machine?
The function of a commutator in a dc generator is to collect the current generated in armature conductors. While in the case of a dc motor, the commutator helps in providing current to the armature conductors. A commutator consists of a set of copper segments which are insulated from each other.