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What is the main function of the commutator?

What is the main function of the 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.

What is the function of a commutator segment in an armature?

The commutator switches the current from one rotor coil to the adjacent coil. The switching requires the interruption of the coil current.

What important function does the commutator accomplish in DC motor?

The commutator in a DC Motor directs the applied DC voltage/current to the specific coil/coils such that the resultant space flux in the armature is displaced ideally 90deg with respect to the field flux, even though individual coils are rotating along with the armature, thereby ensuring the development of maximum …

What is the function of armature in?

The first is to carry current across the field, thus creating shaft torque in a rotating machine or force in a linear machine. The second role is to generate an electromotive force (EMF). In the armature, an electromotive force is created by the relative motion of the armature and the field.

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

What are the function of brushes?

A brush is a device which conducts current between stationary wires and moving parts, most commonly in a rotating shaft. Typical applications include electricmotors, alternators and electric generators.

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 another name for an armature?

What is another word for armature?

structure framework
fabric skeleton
edifice configuration
infrastructure framing
cadre architecture

What is difference between armature and rotor?

It is located inside the stator and its objective is to rotate so that in turn the motor shaft or generator rotates. So basically, the rotor consists of a field magnet which rotates while the rotor remains stationary and on the other hand the armature carries current and is stationary and part of the stator.

What is the function of brushes in motor?

IN ELECTRIC MOTOR the function of brushes is to make contact with the rotating rings and through them to supply current to the coil. function of commutator in an electric motor is to reverse the direction of current through the coil periodically.

Why carbon is used in brushes?

Carbon is used because of its self-lubricating properties, this means less wear on the commutator in comparison with brushes made of harder metals such as copper or steel, in addition to this, it is a good conductor.

What is the other name of commutator?

commutator; reverser; current-reverser; switch.

What is the function of the commutator on the armature?

Because we consider the commutator as the rotor, which is the most important part of the DC generator, these are some of the reasons: It connects between the rotating armature conductors and stationary external circuits by the brushes. It converts the alternating current produced in armature conductors to a unidirectional current in the external load circuit. Sequentially it also converts the alternating torque to continuous torque in the armature in motor action.

What is the difference between rotor and armature?

A rotor is the rotating part in AC motors whilst an armature is the rotating part part in DC motors. A rotor has no commutator bars but an armature has commutator bars which carry currient from the supplier to the windings.

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 armature and use of armature?

Armature is a power-producing component of a motor and its key function is to convert electrical energy to mechanical energy. Armatures used in starter motors are made up of coils which carry current and rotate in a magnetic field.