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AC motors are particularly suited for constant-speed applications. Because its speed is determined by the frequency of AC voltage applied to the motor terminals. AC synchronous motors operate at a constant speed up to full load. The rotor speed is equal to the speed of the rotating magnetic field of the stator. AC Torque motors are suitable for controlling tension and pushing applications in winding operations. Torque can be set to any desired level by changing the input voltage. Synchronous linear motors are often used where the exact speed of a motor must be maintained. In AC induction or traction design motors, the current is induced into the rotor windings without any physical connection with the stator windings. They provide considerable power and variable speed control. They are available in capacitor run, single and three-phase motor. Stepper motors provide precise positioning and ease of use.
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