What is Generator ?

hi

Generator is a machine that converts mechanical energy into electrical energy.

It works based on principle of faraday law

electromagnetic induction

The faradays law states that whenever a conductor is placed in a varying magnetic field

this induced EMF is equal to the rate of change of flux linkages

This EMF can be generated when there is either relative space or relative time

variation between the conductor and magnetic field

So the important elements of a generator are:
Magnetic field
Motion of conductor in magnetic field

Working of Generators

Generators are basically coils of electric conductors, normally copper wire

that are tightly wound onto a metal core and are mounted to turn around inside an exhibit of large magnets

An electric conductor moves through a magnetic field

the magnetism will interface with the electrons in the conductor to induce a flow of electrical current inside it.

The conductor coil and its core are called the armature

connecting the armature to the shaft of a mechanical power source

the copper conductor can turn at exceptionally increased speed over the magnetic field.

The point when the generator armature first starts to turn

then there is a weak magnetic field in the iron pole shoes.

Some of this voltage is making on the field windings through the generator regulator.

This impressed voltage builds up stronger winding current, raises the strength of the magnetic field.

The expanded field produces more voltage in the armature. This, in turn, make more current in the field windings, with a resultant higher armature voltage.

At this time the signs of the shoes depended on the direction of flow of current in the field winding.

The opposite signs will give current to flow in wrong direction.

Types of Generators