Monday, June 27, 2011
8:25 AM | Posted by
Editor in chief |
We will now study how a generator works.you now know the faraday's law. Keep in mind that virtually all generators in service today have coils of wire mounted on stationary housings, called stators, where voltage is produced due to the magnetic field provided on the spinning rotor. The rotor is sometimes called the
field because it is responsible for the magnetic field portion of the generator. The rotor’s strong magnetic field passes the stator windings (coils), thus producing or generating an alternating voltage (AC) that is based on Faraday’s Law.The amplitude of the generator’s output voltage can be changed by changing the strength of rotor’s magnetic field. Thus, the generator’s output voltage can be lowered by reducing the rotor’s magnetic field strength.
Placing a coil of wire (conductor) in the presence of a moving magnetic field produces a voltage, as discovered by Faraday. This principle is graphically presented in above Figure .While reviewing the drawing, note that changing the rotor’s speed changes the frequency of the sine wave. Also recognize the fact that increasing the number of turns (loops) of conductor or wire in the coil increases the resulting output voltage.
Do you feel confused confused about this lesson? Leave your question now in a comment.
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