In the armature, an electromotive force is created by the relative motion of the armature and the field. When the machine or motor is used as a motor, this EMF opposes the armature current, and the armature converts electrical power to mechanical power in the form of torque, and transfers it via the shaft.
What is the use of armature in a motor?
An armature is used as an electric motor or generator. The armature is used to communicate between two magnetic fluxes. When the armature is used as an electric motor, due to relative motion between flux produced by the field winding and the flux produced by the armature winding the EMF is induced.
How do you know if your engine armature is bad?
Signs of a bad armature
Burnt-out armature: It may be the result of several issues like poor airflow, overloading, stalling, earthing, insulation breakdown, regulator failure, and so forth. If a burnt-out armature is the problem, you will have to rewind the armature.
What is the function of armature in electric motor Class 10?
1) Armature- Rotates when electric current is passed hence its kinetic energy can be used for various purposes. 2) Brushes- Maintains contact of the armature coil with the main circuit while rotating. 3) Split Rings- Prevents the rotation of the main circuit while the rotation of armature coil.
Where is the armature in a motor?
A DC motor has coils of wire mounted in slots on a cylinder of ferromagnetic material, which is termed the armature. The armature is mounted on bearings and is free to rotate. It is mounted in the magnetic field produced by permanent magnets or current passing through coils of wire, which are called the field coils.
What is the difference between armature and commutator?
An armature is a combination of the winding, commutator, brushes, and ball bearings.
What is Commutator?
|It produces flux that interacts with the main field to produce armature reaction||Due to the armature reaction, the commutator is able is to receive the current from the core winding.|
What is difference between armature and rotor?
The armature is the winding to which the load is connected. In small generators, the field windings are often on the stator, and the armature windings are on the rotor. Most large machines, however, have a rotating field and a stationary armature. … Thus, the armature is the stator and the field is the rotor.
What causes armature failure?
Worn commutators are one of the most common causes of armature failure. When commutators become worn or damaged, they wear down carbon brushes much quicker which can result in a damaged or destroyed armature.
How do you test an engine armature?
The third and final test is to measure the resistance of every commutator bar to the iron armature stack. If the motor armature stack is directly pressed onto the armature shaft, you can use the armature shaft for the measurement.
Can a commutator be repaired?
In this situation, there are typically two possible options remaining for repairing the problem: Refilling the commutator – involves reusing the steel core, but manufacturing new copper, risers, and insulation.
What is the function 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.
What is the principle of motor?
The principle of an electric motor is based on the current carrying conductor which produces magnetic field around it. A current carrying conductor is placed perpendicular to the magnetic field so that it experiences a force.
What is the function of armature coil?
Armature – It is a rectangular coil that is placed in a uniform magnetic field. The main function of the armature is to rotate the shaft or axel to which it is attached.
How do you make an electric motor more powerful?
We can increase the turning force (or torque) that the motor can create in three ways: either we can have a more powerful permanent magnet, or we can increase the electric current flowing through the wire, or we can make the coil so it has many “turns” (loops) of very thin wire instead of one “turn” of thick wire.
What does armature mean?
1 : an organ or structure (such as teeth or thorns) for offense or defense. 2a : a piece of soft iron or steel that connects the poles of a magnet or of adjacent magnets.
What are the similarities and differences between electric motor and generator?
The motor and the generator are almost similar from the construction point of view, as both have stator and rotor. The main difference between the two is that the Motor is an electric device which converts electrical energy into mechanical energy. The generator is vice versa of that motor.