Home » What Will Happen If Commutator Is Not Used In A Dc Motor? Top Answer Update

# What Will Happen If Commutator Is Not Used In A Dc Motor? Top Answer Update

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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.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.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 there is no commutator in 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.

## Why commutator is used in DC 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.

### L16: Role of Commutator in DC motor

L16: Role of Commutator in DC motor
L16: Role of Commutator in DC motor

## Why is a commutator necessary?

To keep the coil rotating in same direction, commutator is needed to change the direction of current in the coil after each half rotation of coil.

## What are the effects on poor commutation of DC machine?

The poor commutation means sparking and bar burning of DC generators.

## What is a commutator in a motor?

A commutator is a rotary electrical switch that periodically reverses 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) universal motors.

## Why does an AC motor not need a commutator?

The main purpose of commutator is only to convert Ac to DC or vice versa, But in case of alternaters Commutator is not required because output will be AC only not DC. In case of DC generators Generation is AC so by using commutator will convert the AC to DC.

## What are the two functions of commutator in DC machine?

The physical connection to the armature winding is made through a commutator-brush arrangement. 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.

## See some more details on the topic What will happen if commutator is not used in a DC motor? here:

### Why Will A Motor Not Work Without A Commutator? – hunbay

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 …

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### What happens when there is no commutator? – Sluiceartfair.com

A D.C. generator without commutator is a AC generator. Why are brushes used in DC motor?

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### Commutator – an overview | ScienceDirect Topics

The commutator on the DC generator converts the AC into pulsating DC. The commutator assures that the current from the generator always flows in one direction.

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### Guess what will happen if there is no split ring commutator in …

Explanation: Without a split ring commutator the current would not reverse when armature reverses, and the magnetic fields of the rotor and …

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## Where are commutators used?

Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced.

## What is the function of a commutator in an 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?

Commutator converts the Alternating to direct current in a DC generator. The alternating current generated in the armature windings of the generator gets converted to direct current after it passes through the commutator and the brushes.

## How does commutator reverse current?

The split ring commutator reverse the current in the armature every half revolution when the commutator changes contact from one brush to another. This reverse in current causes the forces acting on the coil to be reversed. This helps the coil continue to rotate in a clockwise direction.

## Why commutators are sparking heavily?

Commutators are sparking heavily due to the following reasons: Sparking can be induced by various conditions like motor overload, vibration, increased humidity, worn brushes and worn commutators.

Commutation
Commutation

## What is the effect of poor commutation?

If the current reversal is completed during the commutation period, sparking occurs at the contact of brushes and overheating occurs damaging the surface of the commutator. This defect is called Poorly commutated Machine.

## What is commutation in dc machines?

The commutation in DC machine or more specifically commutation in DC generator is the process in which generated alternating current in the armature winding of a dc machine is converted into direct current after going through the commutator and the stationary brushes.

## What are some of the problems with commutation in a real machines?

There are two main issues occurs due to this armature reaction.
• Neutral-Plane Shift.
• Flux Weakening.

## What is a commutator and what is its role in an experiment?

Commutation is the process of switching the field in the armature windings to produce constant torque in one direction, and the commutator is a device connected to the armature, which enables this switching of current. The lever arm for the torque produced on the armature varies with the angle of the coil (cos α).

## What is the requirement of the Good commutation?

What is the requirement of the good commutation? Explanation: Brushes are in contact with commutator. So, for good commutation brushes must be of superior quality so that brushes will give/receive appropriate current to and from commutator.

## What is the difference between armature and commutator?

The combination of the commutator, ball bearings, winding & brushes is called an armature.

Key Difference between Armature & Commutator.
Armature Commutator
It provides current to commutator from the core of the armature It changes AC to DC & vice-versa
It is a set of coils arranged in the core It is a set of segments

## Which type of motor does not have brushes or a commutator?

Brushless DC (BLDC) motors

In the brushless version of our rotary DC motor, the windings are on the stator and the magnets are on the rotor (see figure 5). Because the windings are fixed, direct electrical connections can be made to them easily. As a result, there is no need for a mechanical commutator and brushes.

## Does induction motor have a commutator?

Repulsion Start Induction Motor

The induction motor rotor windings are brought out to commutator segments for starting by a pair of shorted brushes. At near running speed, a centrifugal switch shorts out all commutator segments, giving the effect of a squirrel cage rotor.

## What is the other name of commutator?

commutator; reverser; current-reverser; switch.

## What is the importance of commutator and brushes in DC machine?

The physical connection to the armature winding is made through a commutator-brush arrangement. 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.

### DC Motor without Commutator — xmdemo 024

DC Motor without Commutator — xmdemo 024
DC Motor without Commutator — xmdemo 024

## What is a commutator in DC machines Mcq?

What is a commutator in DC machines? Explanation: Commutator is an electrical device found only in DC machines. It is used to reverse the current direction between rotor and external circuit. It also changes dc voltage to alternating voltage.

## Is slip ring a commutator?

A commutator is a specialized slip ring typically used on Direct Current motors and electrical generators to transfer electrical power between the stationary housing and the rotating armature with the added purpose of reversing the electrical current direction.

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