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  2. History of perpetual motion machines - Wikipedia

    en.wikipedia.org/wiki/History_of_perpetual...

    Investigation into the device eventually found a source of power that drove it. [20] John Ernst Worrell Keely claimed the invention of an induction resonance motion motor. He explained that he used "etheric technology". In 1872, Keely announced that he had discovered a principle for power production based on the vibrations of tuning forks ...

  3. Induction generator - Wikipedia

    en.wikipedia.org/wiki/Induction_generator

    An induction generator produces electrical power when its rotor is turned faster than the synchronous speed.For a four-pole motor (two pairs of poles on stator) powered by a 60 Hz source, the synchronous speed is 1800 rotations per minute (rpm) and 1500 RPM powered at 50 Hz.

  4. Magnetohydrodynamic generator - Wikipedia

    en.wikipedia.org/wiki/Magnetohydrodynamic_generator

    A magnetohydrodynamic generator (MHD generator) is a magnetohydrodynamic converter that transforms thermal energy and kinetic energy directly into electricity.An MHD generator, like a conventional generator, relies on moving a conductor through a magnetic field to generate electric current.

  5. Magic item - Wikipedia

    en.wikipedia.org/wiki/Magic_item

    Magic items are commonly found in both folklore and modern fantasy. Their fictional appearance is as old as the Iliad in which Aphrodite's magical girdle is used by Hera as a love charm. [1] Magic items often act as a plot device to grant magical abilities. They may give magical abilities to a person lacking in them, or enhance the power of a ...

  6. Magic in fiction - Wikipedia

    en.wikipedia.org/wiki/Magic_in_fiction

    Within a work of fantasy, magic can help to advance the plot, often providing power to heroes or to their opponents. The use of magic frequently manifests itself in a transformation of a character, if not the transformation of the fictional world. [2]: 143 For magic to carry out its functions, it often comes at a price equal to its value.

  7. Permanent magnet synchronous generator - Wikipedia

    en.wikipedia.org/wiki/Permanent_magnet...

    A permanent magnet synchronous generator is a generator where the excitation field is provided by a permanent magnet instead of a coil. The term synchronous refers here to the fact that the rotor and magnetic field rotate with the same speed, because the magnetic field is generated through a shaft-mounted permanent magnet mechanism, and current is induced into the stationary armature.

  8. Electric generator - Wikipedia

    en.wikipedia.org/wiki/Electric_generator

    U.S. NRC image of a modern steam turbine generator (STG). In electricity generation, a generator [1] is a device that converts motion-based power (potential and kinetic energy) or fuel-based power (chemical energy) into electric power for use in an external circuit.

  9. Engine–generator - Wikipedia

    en.wikipedia.org/wiki/Engine–generator

    An engine–generator is the combination of an electrical generator and an engine (prime mover) mounted together to form a single piece of equipment. This combination is also called an engine–generator set or a gen-set. In many contexts, the engine is taken for granted and the combined unit is simply called a generator. An engine–generator ...