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.
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.
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).
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 makes the armature in an electric motor rotate?
A changing magnetic field can induce an electric current. What makes the armature in an electric motor rotate? The magnet of the motor exerts a force (up on one side, down on the other side) on the armature, which causes the armature to rotate. … An electromagnet has a stronger magnetic field than the solenoid has.
What is the function of commutator in an electric motor?
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 are the parts of electric motor Class 10?
Construction of Electric Motor
- (1) Armature coil. It consist of a single loop of an insulated copper wire in the form of a rectangle.
- (2) Strong field magnet. Armature coil is placed between 2 pole pieces of a strong magnet which provide strong magnetic field.
- (3) Split ring type commutator. …
- (5) Battery.
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 is armature voltage?
Armature voltage is the voltage developed at the terminals of the armature winding of an AC or a DC machine during generation of power.
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 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 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?
How does an electric motor work simple?
This simple electric motor works by the magnetic force F = IL x B. The current goes around the coil so that it points one direction in one end of the loop and in the other direction at the other end of the loop. The magnetic field at both of these spots points in the same direction.
What is the basic principle of DC motor?
DC motors operate on Faraday’s principle of electromagnetism which states that a current-carrying conductor experiences a force when placed in a magnetic field.
Does an electric motor transforms matter?
When a wire with a current is placed in a magnetic field, electrical energy is transformed into mechanical energy. … An electric motor transforms potential energy into mechanical energy.
How does a motor rotate?
Large AC motors (used in things like factory machines) work in a slightly different way: they pass alternating current through opposing pairs of magnets to create a rotating magnetic field, which “induces” (creates) a magnetic field in the motor’s rotor, causing it to spin around.