What does armature reaction in DC motor means?

The armature reaction is the effect of the armature flux on the main flux. In case of a DC motor the resultant flux is strengthened at the leading pole and weakened at the trailing pole tips.

What is armature reaction Wikipedia?

The armature reaction changes the distribution of the magnetic field, which affects the operation of the machine. The effects of the armature flux can be offset by adding a compensating winding to the main poles, or in some machines adding intermediate magnetic poles, connected in the armature circuit.

What is armature reaction in alternator?

Armature reaction in alternator is defined as the effect of armature flux on the main flux produced by the field poles. When there exists a relative motion between the magnetic flux and armature winding, the armature conductor cuts the field flux. Hence there will be a change in flux linkage in the conductor.

What are the function of 1 armature core?

Armature: It is a rectangular iron core wrapped by the copper coil through which electricity passes and due to magnetic field it experiences a force and rotates. Brushes: It conducts current between stationary wires and moving parts, most commonly in a rotating shaft.

What is armature in dc machine?

DC Armature. The armature of an electric machine is the name historically given to the winding where a voltage is induced and power transfer between electrical and mechanical systems occurs. It is a term used in dc machines and ac synchronous machines. In a dc machine, the armature is the rotating circuit.

What is 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.

What is armature reaction Quora?

Armature reaction is effect of armature flux on main field flux. Basically there are two windings in a dc motor – Armature winding (on rotor) and field winding (on stator). When we excite the field winding, it produces a flux which links with the armature. This causes an emf and hence a current in the armature.

How do you reduce the armature reaction in an alternator?

Reduce Armature reaction in DC Machine

1. The armature reaction causes the distortion in main field flux.
2. If reluctance at pole tips is increased it will reduce distorting effect of armature reaction.
3. The effect of armature reaction can be neutralized by use of compensating winding.

What are the main effects of armature reaction?

Armature reaction has two undesirable effects: First, it distorts the main field. Secondly, it reduces the main field flux or both. When the main field is distorted, then there will be a cross magnetizing effect.

What is an armature in physics?

(ˈɑːmətjʊə) n. 1. ( General Physics) a revolving structure in an electric motor or generator, wound with the coils that carry the current.