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The displacement between the running and the starting (auxiliary) windings in a single-phase induction motor is typically 90 electrical degrees. This phase displacement allows the motor to generate a rotating magnetic field, which is necessary for starting and running the motor. By having the windings displaced by 90 degrees, the motor can produce a more balanced torque, aiding in its starting and improving its efficiency during operation. The starting winding is often engaged with the help of a centrifugal switch or an electronic controller and is disconnected once the motor reaches a certain speed.
: b
Explanation: The split phase starting makes use of the starting windings along with the
running windings. The running winding displaces the starting windings by 900.