Alternator:
An alternator is a mechanical device that converts mechanical energy into AC electrical energy. It is a type of generator where the magnetic field rotates around the armature. The magnetic field generated by either permanent magnet or electromagnet using DC supply. The electromagnet is in housing surrounding the armature. The magnetic field rotated by any means, known as the prime mover. Its rotation causes the change in the magnetic field lines intersecting the armature conductors. As a result, an electric current is induced in the armature.
Generator:
A generator is a mechanical device that converts mechanical energy into AC or DC electrical energy. In the generator, the outer housing that surrounds the armature is made of either permanent magnet or an electromagnet that is stationary known as the stator. The armature is made up of coils of conductors that rotate around its axis inside this stationary magnetic field.
