Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 49, Problem 4SQ
To determine
Explain the reason for providing the protective resistors on coils for high-speed shunt brakes.
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Explain regenerative braking in detail as applied to electric motive
Explain the effect of increasing
the armature voltage on the
behavior of the series wound
machine without the braking unit.
(B)- Indicate whether the following statements are true or false and correct the false
statements
1- Wave wound armature has two parallel paths.
2- The current ratio is equal to 1/ turn ratio at no-load while the voltage ratio is
equal to 1/ turn ratio at full load
5.4.
3-When a series de motor is operated without a load, the armature draws
excessive
current
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4- The hysteresis loss can be minimized by using core of thin laminations
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Chapter 49 Solutions
Electric Motor Control
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