(Solved): 2. 2.1 A 3-phase, 4 pole (2 pole pairs) wound induction motor is connected to a 50 Hz supply. It r ...

2. 2.1 A 3-phase, 4 pole (2 pole pairs) wound induction motor is connected to a 50 Hz supply. It runs as seen from one end, when the rotor terminals are shorted. If the rotor terminals are open circuited, and the rotor is rotated (by external means), determine: 2022clockwise a) the frequency of the voltage across the rotor terminals when rotated at 1,450 rpm anti- clockwise. Also, identify the operating mode of the motor. [3] b) the frequency of the voltage across the rotor terminals when rotated at 1,550 rpm clockwise. Also, identify the operating mode of the motor. [3] 2.2 What are the limitations of V/f control in induction motors? [2] 2.3 List two characteristics of any application using an induction motor with voltage control. [2] N