Question

Construction of a Ac generator

Answer 1

Explanation:

${Generator is based on faraday's law. When the rotor of AC Generator is rotated by prime-mover, the magnetic flux linkage with the stationary armature winding (mounted on Stator) changes. ... A permanent magnet is taken as rotor instead of rotor with field winding.$

Answer 2

Answer:

Construction:

(1) Armature: It is a coil of large no. of turns of copper wire wound over an iron core. (because iron has high permeability). The coil is rotated about its axis.

(2) Field Magnets: North and south are the pole pieces of a strong magnet in which the coil is rotated. The axis of the coil is perpendicular to the magnetic field.

(3) Rings (R1 and R2): (also called slip rings): These are the two hollow metallic rings which are connected to the ends of the coil. These rings rotate with the rotation of coil.

(4) Brushes (B1 and B2): These are the two metal plates or carbon rods. They are fixed and kept in contact with R1 and R2. The purpose of the brushes is to pass current from the armature to the external load resistance.