Draw the circle diagram for a 5.6 kw 400 v 3 phase, 4 pole, 50 Hz slip ring induction motor from the following data No load test 400 v, 6A, 380 W Blocked Rotor Test 110 V, 11 A, 720 W The ratio of stator to rotor turns = 2.5, stator resistance per phase is 0.67 ohm and rotor is 0.185 ohm, calculate(a)full load current and power factor. (b)full load torque and maximum torque. (c)maximum power factor and slip at maximum torque. (d)Resistance to be inserted in rotor circuit to give starting torque 170% of full load torque. *

Draw the circle diagram for a 5.6 kw 400 v 3 phase, 4 pole, 50 Hz slip ring induction motor from the following data No load test 400 v, 6A, 380 W Blocked Rotor Test 110 V, 11 A, 720 W The ratio of stator to rotor turns = 2.5, stator resistance per phase is 0.67 ohm and rotor is 0.185 ohm, calculate(a)full load current and power factor. (b)full load torque and maximum torque. (c)maximum power factor and slip at maximum torque. (d)Resistance to be inserted in rotor circuit to give starting torque 170% of full load torque. *

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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