Question

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Answer 1

Hey mate here's your answer by
Sidrakauser ❤

Construction of AC Generator:

An AC Generator essentially consists of two main parts: Stator and Rotor. Stator is the stationary part of machine whereas rotor is rotating part. A prime mover is coupled to this rotor to supply mechanical energy.

Stator:

Stator is stationary component on which armature winding is wound. Armature winding is the winding which carries load current. Here load means any device or equipment which consumes electrical power. This stator is stack of laminated steel assembled to form a cylindrical structure. Steel lamination are used to minimize the eddy current loss.

Slots for housing stator winding (armature winding) are cut along the periphery of the stator.

Rotor:

Rotor is the rotating component of AC Generator. It is also made of laminated steel. DC Field winding or exciting winding is wound on the rotor to create magnetic poles i.e. North and South Poles. This exciting winding is supplied DC current through an assembly of slip ring and carbon brush.

There are basically to designs for rotor. One is Salient Pole Rotor and another is Cylindrical Rotor.
Working Principle of AC Generator:

The basic working principle of AC 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. Due to this an emf is induced in the armature winding. If load is connected, an AC current starts flowing through the load due to the induced emf. This is how an AC Generator works. 

Let us consider the figure below to better understand the AC generator working principle. In the figure, a single armature winding is considered for the sake of simplicity. A permanent magnet is taken as rotor instead of rotor with field winding. Rotor is assumed to be rotating in clockwise direction.

Hope it helps you ✌✌