Question

Q1). [36 marks in total]

a) Explain why the number of poles (teeth) in the stator and rotor must not be equal for a stepper motor. [6 marks]

b) Provide your recommendations for reduction of magnetic loss in an induction motor [6 marks]

c) Explain that a single-phase winding induction motor cannot generate torque to start and run the rotor [6 marks]

d) Explain the rotor of an induction motor cannot run at the same speed to that of stator field [6 marks]

e) Explain the important differences between a DC motor and an Induction motor [6 marks]

f) Write the relationship between Line voltage, phase voltage, line current and phase current between three phase Star and Delta systems. [6 marks]

Answer 1

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