Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Textbook Question
Chapter 35, Problem 6RQ
What unit controls the voltage applied to the armature?
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1. What will be the output voltage during the positive half cycle of the input voltage?
2. What will be the output voltage during the negative half cycle of the input voltage?
What happens when the low-voltage current flow in the coil primary winding is interrupted by the switching device?
The primary winding delivers a high-voltage spark to the plugs.
The magnetic field in the coil primary builds.
The secondary voltage drops to zero volts.
High voltage is induced in the secondary windin
Chapter 35 Solutions
Understanding Motor Controls
Ch. 35 - Prob. 1RQCh. 35 - Why is this component used instead of a diode?Ch. 35 - What is a freewheeling or kickback diode?Ch. 35 - Name two methods of sensing the current flow...Ch. 35 - Prob. 5RQCh. 35 - What unit controls the voltage applied to the...Ch. 35 - What device is often used to sense motor speed?
Ch. 35 - Prob. 8RQ
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- What type of armature winding is generally used for machines designed to operate on low voltage and high current?arrow_forwardWhat is the standard current rating for the secondary winding of a CT?arrow_forwardWhy should the secondary winding of a CT never be disconnected from its load when there is current flow in the primary?arrow_forward
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