Describe the principle, construction and working of an A.C generator in detail
Answers
Answer:
Explanation:
PRINCIPLE: Whenever in a closed circuit the magnetic field lines change, an induced current is produced.
CONSTRUCTION: It consists of the following parts:
a) Armature: The armature, in contrast, must carry current, so it is always a conductor or a conductive coil, oriented normal to both the field and to the direction of motion, torque (rotating machine), or force (linear machine). The armature's role is twofold. Commutator and Brushes on DC Motor.
b) Field Magnet: Field magnet refers to a magnet used to produce a magnetic field in a device. It may be a permanent magnet or an electromagnet.
c) Slip Rings: Slip rings are two hollow rings to which two ends of the armature coil are connected. These rings rotate with the rotation of the coil. Its purpose is to allow for electrical contact with the brushes.
d) Brushes: It's function is to make contact with the rotating rings, and supply current to the coil.
WORKING: The working of a AC Generator is clear.When the armature rotates between the poles of the magnet upon an axis perpendicular to the magnetic field, the flux which links with the armature changes continuously. Due to this, an emf is induced in the armature. This produces an electric current through the galvanometer and the slip rings and brushes.
The galvanometer swings between the positive and negative values. This indicates that there is an alternating current flowing through the galvanometer.
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