Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Question
Chapter 16, Problem 12RQ
To determine
The two devices used to eliminate the induced voltage produced in the rotor when the field excitation current is stopped.
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Students have asked these similar questions
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.
Name three factors that determine the amount of voltage induced in the rotor of a wound-rotor motor.
The reason why the starting torque of a series motor is higher than a shunt motor is
because the series motor has
O more current flowing through its armature
O a stronger net magnetic field around both coils during the inrush of stator current
Chapter 16 Solutions
Electrical Transformers and Rotating Machines
Ch. 16 - What conditions must be met before two alternators...Ch. 16 - How can the phase rotation of one alternator be...Ch. 16 - What is the function of the synchronizing lamps?Ch. 16 - What is a synchroscope?Ch. 16 - Assume that alternator A is supplying power to a...Ch. 16 - What two factors determine the output frequency of...Ch. 16 - At what speed must a six-pole alternator turn to...Ch. 16 - What three factors determine the output voltage of...Ch. 16 - What are slip rings used for on a rotating field...Ch. 16 - Is the rotor excitation current AC or DC?
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