Semester 2, 2021/22 Subject Code: EE3002A/B Q5 a) Draw two types of armature connection of DC machine and list the differences between them. (5 marks) b) Draw the circuit diagram for synchronizing a synchronous generator to a power system and list four conditions for synchronizing a synchronous generator. (5 marks) c) Draw the circuit diagram of four braking methods for an induction motor. (5 marks) d) Based on the equivalent circuit of induction motor, show that the starting torque of a three-phase induction motor can be expressed as: 1 3V T = 2nns (R1 + R2')2 + (X1 + X2') Rz' (5 marks) e) List three methods to change the speed of an induction motor. (5 marks)