Q1. The shaft power output of 3-phase, 4 poles, 50Hz induction motor is 32 KW at 1420 rpm, efficiency 85%, stator copper losses are 750 W, stator core losses are 1020 W, Friction and amount losses amount about 1.5% of shaft power output, calculate: a) Slip speed b) Mechanical power developed c) Rotor input power or transmitted power. d) Total stator losses e) Stator input power f) Shaft speed if the slip is doubled g) Internal torque h) Load torque i) Input power j) Total losses

Q1. The shaft power output of 3-phase, 4 poles, 50Hz induction motor is 32 KW at 1420 rpm, efficiency 85%, stator copper losses are 750 W, stator core losses are 1020 W, Friction and amount losses amount about 1.5% of shaft power output, calculate: a) Slip speed b) Mechanical power developed c) Rotor input power or transmitted power. d) Total stator losses e) Stator input power f) Shaft speed if the slip is doubled g) Internal torque h) Load torque i) Input power j) Total losses

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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A value of magnetizing current in a 3-phase induction motor * gives power factor smaller .. larger smaller. .poor large . better O large...poor O
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a) The rotor power output of a 3-phase induction motor is 15 kW and the corresponding slip is 4%. The rotor copper loss will be..
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