Electrical Transformers and Rotating Machines
Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 16, Problem 10RQ

Is the rotor excitation current AC or DC?

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a- What are the assumption rigid rotor model is based on? b-What are the limitations of this model?
The supply frequency is 50 Hz. What will be the rotor voltage frequency if the motor speed is equal to 90% of synchronous speed. O 45 Hz. O 10 Hz. 05 Hz. O None.
What is the frequency (in Hz) of a motor spinning at 1740 rpm?
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