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Original two-phase AC induction motor of Nikola Tesla

Original two-phase AC induction motor of Nikola Tesla

TWO-PHASE alternating-current (AC) induction motor was built by Tesla in 1887. By energizing pairs of induction coils on either side of the stator with two separate out-of-phase alternating currents, he created a rotating magnetic field that induced an opposing electric field in the rotor, causing it to turn.