DieselShip's Online Content Library

Q5. With reference to three phase induction motors:

a) Explain the phenomenon of crawling and cogging in these motors (6)

b) A three-phase induction motor is wound for four poles and is supplied from a 50 Hz System calculate:

a) The synchronous speed

b) The speed of rotor when the slip is 4 per cent.

c) The rotor frequency when the speed of the rotor is 600 r/min. (10)