2S QUESTION 3 (a) In the direct-current (d.c.) generator shown in Figure 03.1, (i) ?, is...
Question 39. A 4-pole Direct Current (DC) armature wave winding has 294 conductors: (i) What flux per pole is necessary to generate 230 V when rotating at 1500 revolutions per minute (rpm)? (ii) What is the electromagnetic torque at this flux when rated armature current of 120 A is flowing? (iii) How many interpole ampere turns are required with this current if the interpole gap magnetic flux density is to be 0.15 tesla and the effective radial air gap is...
Question: A 4-pole Direct Current (DC) armature wave winding has 294 conductors: (i) What flux per pole is necessary to generate 230 V when rotating at 1500 revolutions per minute (rpm)? (ii) What is the electromagnetic torque at this flux when rated armature current of 120 A is flowing? (iii) How many interpole ampere turns are required with this current if the interpole gap magnetic flux density is to be 0.15 tesla and the effective radial air gap is 8 mm....
2) (a) Describe the principle of operation of 3-phase induction motor. [8 Marks](b) Explain slip as applied to three phase induction motor. [2 Marks]3) Derive an expression for the total armature torque of DC motor. [10 Marks]5) List the starting methods used in starting 3-phase induction motors and explain any two of these methods. [10 Marks]6) (a) A 60 kW, 400 V d.c. shunt motor has 4 poles a 2-circuit wave-connected armature winding with 450 conductors. The flux per pole...