Electric generator is a device producing electricity by converting mechanical energy into electrical energy. Electric generator exerts a force on the free electrons that electric current can flow to the outer circuit. To be able to generate electricity, electricity generators require external sources of mechanical energy that can be converted into electricity. A common source of mechanical energy used today comes from steam turbine engines, turbines of hydroelectric (hydropower), or it could be from wind power turbines. Generally at this time, our electricity is the result of the electrical generator.
Electric generator consists of a large dynamo who works for power plants. This is part of an electric generator which is responsible for converting mechanical energy into electrical energy. Of history generator, electric generator was first discovered by Faraday in 1831, known as the Faraday disc generator .. Faraday stringing electrical generators made in the form of a coil of wire in a U-shaped iron workings of the electric generator is utilizing the principle of electromagnetic induction, ie by rotating a coil in a magnetic field causing the induction energy.
Electric generator tool has 2 main components, namely: stationary part (Sator) and moving parts (rotor). The rotor will be in touch with the electrical generator shaft rotates at the center of the stator. Furthermore, part of the electrical generator shaft will rotate by using external force, such as that derived from water turbines and steam turbines. Based on the type of electrical current is generated, electricity generators can be divided into two types, namely electricity generator Alternator (AC = alternating current) and the electric dynamo generator (DC = direct current).
The AC electrical generator can be recognized from the presence of 2 pieces of the stator. Magnetic poles are opposite each other are exposed, between the two poles of this magnet's magnetic field is generated. Furthermore, the magnetic field in the coil there that can rotate on its axis. Because the rotation of these coils, resulting in the amount of magnetic force into the coil will vary. Type of electrical current generated by the generator current AC power is back - back with a wave-like shape; amplitude is determined by the magnetic field strength, the number of loops of wire, and a broad cross-section of the coil. Meanwhile, the wave frequency equal to the rotation frequency of the coil.
The DC electrical generator. The way it works is similar to the way AC power generator. The difference lies in the split ring found on this DC power generator. Split ring or commutator is located at the output. This section serves as a modifier commutator induced electrical currents that flowed into the electrical circuit to an electrical current DC (unidirectional) although coil residing in it generates AC current (alternating).
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