What is the phase difference between the main and auxiliary winding currents?
The phase difference between the main and auxiliary winding currents in a split phase induction motor typically ranges between 30° to 50°.
Why is the auxiliary winding disconnected once the motor reaches rated speed?
The auxiliary winding is disconnected using a centrifugal switch once the motor reaches around 75-80% of its synchronous speed. This is done because it is no longer needed for developing the starting torque beyond this speed.
How does the rotor produce a rotating magnetic field in a split phase motor?
The interaction between the rotating magnetic field produced by the stator and the induced currents in the short-circuited rotor bars is responsible for producing a rotating magnetic field in the rotor of a split phase induction motor.
What load applications are not suitable for split phase motors?
Loads requiring high starting torque like compressors, pumps, elevators, etc. are not suitable for split phase motors due to their moderate starting capability.
What is the direction of rotation in a split phase induction motor?
The direction of rotation in a split phase induction motor depends upon the phase sequence and can be either clockwise or anti-clockwise as viewed from the motor end. It is determined during the manufacturing itself.