Electric machinery fundamentals
5th Edition
ISBN: 9780073529547
Author: Chapman, Stephen J.
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 6, Problem 6.2Q
How does an induction motor develop torque?
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In your opinion, what happens to the rotor speed and current when mechanical load on an induction motor increases?
B
Examine the saddle torque of induction motors and the effect of different groove structures on the saddle torque.
(7) The only parts suffers from eddy currents in AC motors:
a- The stator.
b- The rotor.
c- The stator and rotor.
(8) The unit of torque is
a- W (rad. s')
b- Js
-1
C- Nm
Chapter 6 Solutions
Electric machinery fundamentals
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- DEGREE: ELECTRICAL ENGINEERING SUBJECT/COURSE: AC MACHINES Answer the following questions (A, B and C) depending on the topic. 1. INDUCTION MOTORS A. State the advantages of using squirrel cage rotor and wound rotor. B. Why is it impossible for the rotor speed to have the same speed with stator? C. How do you control the speed of an induction motor? Describe its operation.arrow_forwardDiscuss how the Torque is developed in an Induction Motor.arrow_forwardHow the rotating magnetic field is produced. Explain its importance in the operation of an Induction Motors.arrow_forward
- what is doubly fed induction motor how it works and also examples based on this motor.arrow_forwardName three factors that determine the torque produced by an induction motor.arrow_forwardWould a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction motor? Explain your answer.arrow_forward
- An induction motor develops rated torque with a slip of 3.5% when the rotor is cold. If the rotor resistance is 20% higher when the motor is at normal running temperature, at what slip it will develop rated torque?arrow_forward6. What should be done for an induction motor to be able to produce the highest possible torque?arrow_forwardAn induction motor has a full load slip of 0.04. It's starting current 5 times its full load current. What is the ratio of starting torque to the full load torque? Select one: a. 2 b. 0.5 c. 0.2 d. 1arrow_forward
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