Electric machinery fundamentals
Electric machinery fundamentals
5th Edition
ISBN: 9780073529547
Author: Chapman, Stephen J.
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 1, Problem 1.16Q

Just how does a decrease in flux produce an increase in speed in a linear machine?

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A dc machine has hysteresis loss of 300 W and an eddy current loss of 200 W when running at 1200 rpm. At what speed will the total core losses be a quarter of the original if the flux is to be twice as the original.
An 8-pole DC machine has a simplex wave-wound armature containing 200 coils of 10 turns each. The resistance of each turn is 0.01 Ω. The flux per pole is 0.004 Wb. what is the internal resistance of the armature in ohms?
What are the rotating parts on d.c machine. commutator segments O brushes O inter-pole O pole shoe

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