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A synchronous electric motor is an AC motor in which at steady state the rotation of the shaft is synchronized with the frequency of the supply current the rotation period is exactly equal to an integral number of AC cycles. Synchronous motors contain multiphase AC electromagnets on the stator of the motor that create a magnetic field which rotates in time with the oscillations of the line

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A synchronous electric motor is an AC motor in which at steady state the rotation of the shaft is synchronized with the frequency of the supply current the rotation period is exactly equal to an integral number of AC cycles. Synchronous motors contain multiphase AC electromagnets on the stator of the motor that create a magnetic field which rotates in time with the oscillations of the line

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### What is a Wound Rotor Motor and How Does it Work

In wound rotor motors the rotor is "wound" with wire similar to the stator with their terminal ends connected to 3 slip rings on the output shaft. These slip rings are attached to brushes and variable power resistor banks where operators can change the speed of the motor by varying the resistance through the rotor

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