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 84
inding should be such as to produce four poles , in order to con stitute a true synchronizing motor . The diagram , Fig . 50 , differs from the previous one only in respect to the order of connections . In the present case the arm ature - coil , instead of being in series with the field - coils ,… … adapted , preferably , to produce the same difference of phase as the field - coils . On starting the motor the shunt is closed around both coils . This is shown in Fig . 51 , in which the armature coils are f < ; . To indicate their different electrical character , there are shown in circuit with…
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