The main function of DC generators is to change mechanical energy into electricity. DC’s generators produce electrical power based on the principle of Faraday’s law of electromagnetic induction.
The four most important component of a DC generator are:
- Stator: Supply magnetic fields around which the coils spin.
- Rotor: The rotor or the armature core is another important part of a DC generator.
- Commutator: The operation of the commutator is like a rectifier to convert AC voltage to DC voltage in the reinforcement of the armature winding.
- Brushes: The electrical connection between the commutator and the external load circuit can be assured.
Working of DC generator
A DC generator is an energy converter that turns mechanical energy into electrical. This change in the form of energy happens based on the principle of electromagnetic induction which means wherever a change in the magnetic flux happens associated with a conductor, an EMF or an electromagnetic force is induced in it. DC generator operates on the principle of the dynamically induced electromagnetic force. When a conductor is placed in a varying magnetic field, an electromotive force gets induced within the conductor. This induced e.m.f magnitude is measured using the equation of the electromotive force of a generator. If the conductor is provided with a closed path, the induced current will circulate within the closed path. In this generator, field coils will generate an electromagnetic field as well as the armature conductors are turned into the field. Therefore, an electromagnetically induced electromotive force (e.m.f) will be generated within the armature conductors. The path of the induced current is provided by Fleming’s right-hand rule.