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Polyphase Coil
Polyphase coils are electromagnetic coils connected together in a polyphase system such as a electrical generator, generator or electric motor, motor. In modern systems, the number of phases is usually three or a multiple of three. Each phase carries a sinusoidal alternating current whose phase (waves), phase is delayed relative to one of its neighbours and advanced relative to its other neighbour. The phase currents are separated in time evenly within each period of the alternating current. For example, in a three-phase system, the phases are separated from each other by one-third of the period. Coil construction Like all coils used in electrical machinery, polyphase coils (made from insulated conducting wire) are wound around ferromagnetism, ferromagnetic armatures with radial projections and maximum core-surface exposure to the magnetic field. The windings are physically separated around the circumference of an electrical machine. The result of such an arrangement is a rotatin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electromagnetic Coil
An electromagnetic coil is an electrical Electrical conductivity, conductor such as a wire in the shape of a wiktionary:coil, coil (spiral or helix). Electromagnetic coils are used in electrical engineering, in applications where electric currents interact with magnetic fields, in devices such as electric motors, Electric generator, generators, inductors, electromagnets, transformers, and sensor coils. Either an electric current is passed through the wire of the coil to generate a magnetic field, or conversely, an external ''time-varying'' magnetic field through the interior of the coil generates an Electromotive force, EMF (voltage) in the conductor. A current through any conductor creates a circular magnetic field around the conductor due to Ampere's circuital law, Ampere's law. The advantage of using the coil shape is that it increases the strength of the magnetic field produced by a given current. The magnetic fields generated by the separate turns of wire all pass throug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
