A Ward Leonard control is a rotating machine like an electrical generator that provides amplification of electrical signals by the conversion of mechanical energy to electrical energy. Changes in generator field current result in larger changes in the output current of the generator, providing gain. This class of device was used for smooth control of large motors, primarily for elevators and naval guns.
Field modulation of a very high speed AC generator was also used for some early AM radio transmissions.[3] See Alexanderson alternator.
Field modulation of a very high speed AC generator was also used for some early AM radio transmissions.[3] See Alexanderson alternator.
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