Electrical Transformers and Rotating Machines
4th Edition
ISBN: 9781305494817
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 16, Problem 11RQ
When a brushless exciter is used, what converts the alternating current produced in the armature winding into direct current before it is supplied to the field winding?
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Chapter 16 Solutions
Electrical Transformers and Rotating Machines
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- Why should the secondary winding of a CT never be disconnected from its load when there is current flow in the primary?arrow_forwardWhat are the effects of improper brush tension in a DC machine?arrow_forwardIs the resistance in the start winding greater or less than the resistance in the run winding?arrow_forward
- What type of armature winding is generally used for machines designed to operate on low voltage and high current?arrow_forwardA CT has a current flow of 80 amperes in its primary winding and a current of 2 amperes in its secondary winding. What is the ratio of the CT?arrow_forwardWhy is it necessary to pick between the commutator bars of DC machines?arrow_forward
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