# Quick Answer: Why commutator is used in electric motor?

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Commutators and brushes are used on all DC generators and DC motors. … 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 commutation in electric motor?

In order to generate motion in a three-phase linear motor there must be switching between the phases to energize appropriate windings. The process of switching between the phases is called commutation.

## Where is the commutator on an electric motor?

A commutator itself is a split rotary ring, typically made of copper, with each segment of the ring attached to each end of the armature coil that is used in some types of electric motors and electrical generators whose job is to periodically reverse the current direction between the rotor and the external circuit.

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## What is the function of commutator in electric motor Class 10?

Answer: The function of commutator or slip ring is to change the direction of current through the coil after every half rotation.

## Can commutator convert AC to DC?

The commutator doesn’t allow the current to change direction in the brushes, so it converts AC to DC. The AC current goes up and down. First it goes from 0 to positive, then it goes from negative to positive, and finally it goes from negative to positive.

## What is armature and commutator?

An armature is an essential component in a DC machine. A commutator is a rotating electrical switch. It gets the flow of current from the windings of an armature. It gets the flow of current from the core of an armature.

## What is the difference between commutator and slip ring?

The main difference is that commutator is used for the conversion of AC to DC. … Slip rings are used in AC motors to provide a continuous transfer of power whereas the commutators are used in DC motors to reverse the polarity of the current in the armature windings.

## What is the purpose of commutator?

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.

## Why we use commutator in a circuit?

Principle of operation

As the shaft rotates, the commutator reverses the flow of current in a winding. … In both the motor and generator case, the commutator periodically reverses the direction of current flow through the winding so that current flow in the circuit external to the machine continues in only one direction.

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## What is the other name of commutator?

commutator; reverser; current-reverser; switch.

## What is role of commutator in DC motor How can we increase the strength of an electric motor?

DC motors use DC current and voltage to power the motor. … A commutator is directly connected to the current-carrying conductor, so it will rotate with the rotor. The commutator maintains electrical contact with its external DC electrical power source by using metal or hard carbon brushes.

## 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 is AC commutator motor?

In electric motor: Alternating-current commutator motors. A specially designed series-commutator motor may be operated from a single-phase alternating voltage supply. When the supply current reverses, both the magnetic field and the armature current are reversed. Thus, the torque remains in the same direction.

## Is commutator present in AC generator?

AC generator does not have commutators. DC generators have commutators to make the current flow in one direction only. AC generators have slip-rings.