A 3-phase, 240-V, 50-Hz, 6-pole, Y-connected induction motor is operating with a per-unit slip of 0.08, 105 A line current, PF=0.9 lagging,and 2400 W stator copper losses.The total friction, windage, and core losses are lumped and assumed to be constant at 3.5 KW.Find the rotor copper losses and the output power of this motor?Select one:O a. PRCL = 2.09 KW and Pout = 26.88 KWO b. PRCL = 4.5 KW and Pout = 28.14 KWO c. PRCL = 2.95 KW and Pout = 30.43 KWO d. NoneClear my choice

Using the power flow diagram of the induction motor, The input power of the induction motor is,…

Answered: A 3-phase, 240-V, 50-Hz, 6-pole,…

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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Similar questions

Name three factors that determine the torque produced by an induction motor.
What are the various losses in an induction motor? On what factors do they depend? IV. V. List the different types of stray load losses in an induction motor.
1. Explain the term air-gap power or power developed in the rotor and shaft power. How these terms are related to each other?2. Derive an expression for the rotor copper loss in terms of slip and input to the rotor?3. What are the various losses in an induction motor? On what factors do they depend?4. List the different types of stray load losses in an induction motor.
Q / What is the benefit, purpose and conclusions of making single-phase induction motors ..?
2. Describe the Torque-Slip characteristics of a three phase induction motor.
I.What is the effect of load on the efficiency of an induction motor? II. Explain the term air-gap power or power developed in the rotor and shaft power. How these terms are related to each other? III. Derive an expression for the rotor copper loss in terms of slip and input to the rotor? IV. What are the various losses in an induction motor? On what factors do they depend? V. List the different types of stray load losses in an induction motor.
A three –phase, 440V, 50 Hz, 6 – pole induction motor running at 950 rpm takes 50 kW at certain load. The friction and windage loss is 1.5 kW and the stator losses = 1.2 kW. Determine the output from the rotor. (a). 42.68 kW (b). 46.48 kW (c). 48.80 kW (d). 44. 86 kW
1- To control the speed of an induction motor, the supply frequency is reduced by 10%. For the same magnetizing current to remain constant, the supply voltage must be....... a) Reduced by 10%, b) Reduced by 20%, c) Increased by 10%, d) Increased by 20% 2. When maximum starting torqua ic ohtoinod
V. List the different types of stray load losses in an induction motor.
An 8 pole, 50 Hz slip ring induction motor runs at a slip of 2.67% on full load. The rotor resistance per phase of the winding is 0.2 ohm. What external resistance per phase must be added in the rotor circuit so that the motor now runs ate a slip of 17.33% such that the torque remains same in both the cases. (Ans: 1.1 ohm)
Examine the saddle torque of induction motors and the effect of different groove structures on the saddle torque.
I. What is the effect of load on the efficiency of an induction motor? I. Explain the term air-gap power or power developed in the rotor and shaft power. How these terms are related to each other? II. Derive an expression for the rotor copper loss in terms of slip and input to the rotor? What are the various losses in an induction motor? On what IV. factors do they depend? V. List the different types of stray load losses in an induction motor.

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