Nikola Tesla, a Serbian-American inventor, discovered the rotating magnetic field principle in 1882, which is the basis of the current machinery AC. He also found the system of motors and generators, polyphase ac that gives energy to modern society. The rotary electric generator intended to produce electromotive forces are sinusoidal functions of time. The single-phase alternators produce a single electromotive force, the phase produced three and in general, the phases of n cause n electromotive forces. The alternator is a machine designed to convert mechanical energy into electricity, generating, by phenomena of electromagnetic induction, an alternating current. The alternators are founded on the principle that, in a conductor subjected to a varying magnetic field creates an induced voltage whose polarity depends on the direction of the field and its value atraviesa.Un it flow generator consists of two main parts: an inductor creates a magnetic field and an armature which is crossed by lines of force of the magnetic field. The size of the alternator is very variable, from the enormous size that is in power plants, the medium which are located in the small wind turbines or generators that are installed automobiles and other modes of transport.
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