What is the main function of armature core?
The function of an armature is multi-purposed. The main role is to conduct current over the field, thus generating shaft torque within an active machine. The secondary purpose of an armature is to produce Electromotive Force (EMF).
What is meant by armature in a motor?
armature. / (ˈɑːmətjʊə) / noun. a revolving structure in an electric motor or generator, wound with the coils that carry the current. any part of an electric machine or device that moves under the influence of a magnetic field or within which an electromotive force is induced.
What is armature core and armature winding?
Generally, the armature core is a hollow cylindrical shape. And the shaft is placed inside the armature core. The core consists of the number of slots. The armature winding is placed in the slots provided on the outer surface of the armature core.
What is armature core made of?
This is why armature cores are made up of many thin pieces of iron, rather than a large, solid piece. These individual, thin pieces have a higher resistance than one solid piece, and therefore, produce less eddy currents and experience lower eddy current loss.
What is an armature in physics?
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.
Why is it called armature?
Terminology. The word armature was first used in its electrical sense, i.e. keeper of a magnet, in mid 19th century. The parts of an alternator or related equipment can be expressed in either mechanical terms or electrical terms.
What is difference between armature and rotor?
In most generators, the field magnet is rotating, and is a part of the rotor, while the armature is stationary, and is a part of the stator. Both motors and generators can be built in either combination with a rotating field and a stationary armature or a stationary field and a rotating armature.
What is pole core?
Pole core basically carries a field winding which is necessary to produce the flux. It directs the flux produced through air gap to armature core, to the next pole. Pole shoe enlarges the area of armature core to come across the flux, which is necessary to produce larger induced emf.
What is armature for class 10th?
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.
What is armature in dc machine?
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.
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 commutator and armature?
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. The core of an armature includes armature windings, brushes & a commutator.
What is pole and pole core?
The field pole consists of pole cores, pole shoes and field winding. The poles are made of thin laminated sheets, to avoid heating and eddy current loss. Pole cores are the projecting rectangular parts, which produce magnetic flux needed for the generator, when it is excited by the field winding.
What is a yoke in motor?
Motor yoke is an iron body which provides the path for the flux to complete the magnetic circuit as well. It provides the mechanical support for the poles. Yoke is made of low reluctance material such as cast iron, silicon steel, rolled steel, cast steel etc.
What is armature in DC motor Class 10?
The armature of a DC motor is a cylinder of magnetic laminations that are insulated from one another. The armature is perpendicular to the axis of the cylinder. The armature is a rotating part that rotates on its axis and is separated from the field coil by an air gap.
What is armature made of?
Armature wiring is made from copper or aluminum. Copper armature wiring enhances electrical efficiencies due to its higher electrical conductivity. Aluminum armature wiring is lighter and less expensive than copper.