From figure 2.5 (a) if the rotor magnetic field in the occurred because an alternating current will cause an induction voltage up to Rotor (similar to the case where the transformer).In the magnetic field caused by the inductive coupling is against the direction of the magnetic field and the สเตเตอร์ has equal value, the result is the rotor rotor will not turnThe rotor สเตเตอร์ so, it is not the roll or not torque motor, but began to turn up in torque will occur in rotor and rotor spin. By the leading.electrical current will flow
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