An amplidyne is an electromechanical amplifier invented during World War II by Ernst Alexanderson. It is usually an AC motor driving a DC generator with modifications to increase the power gain available. A small electrical signal can control the position of a large motor using this approach. ==How an amplidyne works== An amplidyne is a special ty...
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(from the article `Alexanderson, Ernst F.W.`) ...railroads, ship propulsion, and electric motors. In 1916 he patented a selective-tuning device for radio receivers, which became an integral part ...
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