A 3-phase 450-V, 6-pole, 60 Hz Y-connected slip ring induction motor is driving at constant torque of 80 N.m. The parameters of the motor are: R₁=0.5 2, R'₂ 0.2 02, Xeq=492, N₂/N₁-0.3 a) Compute the starting current and the starting torque when no voltage is injected in the rotor circuit. b) Compute the starting current and the starting torque when 7.5 V is injected in the rotor circuit. c) What is the major complication involved in the voltage injection method?
A 3-phase 450-V, 6-pole, 60 Hz Y-connected slip ring induction motor is driving at constant torque of 80 N.m. The parameters of the motor are: R₁=0.5 2, R'₂ 0.2 02, Xeq=492, N₂/N₁-0.3 a) Compute the starting current and the starting torque when no voltage is injected in the rotor circuit. b) Compute the starting current and the starting torque when 7.5 V is injected in the rotor circuit. c) What is the major complication involved in the voltage injection method?
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter35: Harmonics 916
Section: Chapter Questions
Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...
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