In electrical engineering, an armature is the component of an electric machine which carries alternating current. … 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.
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 definition of armature?
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 is an armature in an electric motor Class 10?
(i) 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. (ii) Brushes: It conducts current between stationary wires and moving parts, most commonly in a rotating shaft.
What is the 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 are the 6 parts of an electric motor?
These six components include:
- 1) The Rotor. The rotor is the moving part of your electric motor. …
- 3) The Bearings. The rotor in your electric motor is supported by bearings, which allow it to turn on its axis. …
- 4) The Windings. …
- 5) The Air Gap. …
- 6) The Commutator. …
- What Do All of These Components Have in Common?
What is the difference between armature and commutator?
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 use of armature?
The main role of an armature is multi purposed. The primary role is to transmit current across the field, therefore generating shaft torque within an active machine otherwise strength in a linear machine. The second role of an armature is to produce an EMF (electromotive force).
What is armature wire?
In sculpture, an armature is a framework around which the sculpture is built. … An armature is often made of heavy, dark aluminium wire which is stiff, but can be bent and twisted into shape without much difficulty. The wire is affixed to a base which is usually made of wood.
What is the principle of electric motors?
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.
Where do we use electric motors?
The largest electric motors are used for ship propulsion, pipeline compression and pumped-storage applications with ratings reaching 100 megawatts. Electric motors are found in industrial fans, blowers and pumps, machine tools, household appliances, power tools and disk drives.
What is role of brushes in an electric motor?
A brush or carbon brush is an electrical contact which conducts current between stationary wires and moving parts, most commonly in a rotating shaft. Typical applications include electric motors, alternators and electric generators.
Why stator is used in motor?
In an electric motor, the stator provides a rotating magnetic field that drives the rotating armature; in a generator, the stator converts the rotating magnetic field to electric current. In fluid powered devices, the stator guides the flow of fluid to or from the rotating part of the system.
Is the rotor excitation current AC or DC?
Required magnetic flux is created in the rotor by supplying DC (Direct Current) to the rotor circuit. This Direct Current (DC) is called excitation current. Which is required to generate magnetic flux in the rotor circuit. 2.
What is purpose 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.