Academics – Electro-Technology : 2017/MAR/09
Question
Q9. (a) Explain how torque is produced in a 3-phase squirrel cage induction motor. (5)
(b) State why the starting current is several times higher than the full load current. (3)
(c) State why the power factor is very low on starting. (3)
(d) Describe ONE method of construction by means of which the starting power factor may be raised, the starting current lowered and the starting torque improved. (5)
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