The inventions, researches and writings of Nikola Tesla : with special reference to his work in polyphase currents and high potential lighting (1894)
Martin, Thomas C, Tesla, Nikola · The Electrical Engineer · leaf 40
produced upon the other elements should always be main tained in the proper relation to the former , irrespective of the speed of the motor . Such a condition exists in a continuous current motor ; but in a synchronous motor , such as described , this condition is fulfilled only when the speed is… … in Fig . 14 , are sufficient , but a greater number may be advan tageously employed . It results from this disposition that when the poles of the ring are shifted , currents are generated in the closed armature coils . These currents are the most intense at or near the points of the greatest…
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