EBK ELECTRIC MOTOR CONTROL
10th Edition
ISBN: 9780100784598
Author: Herman
Publisher: YUZU
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Chapter 46, Problem 5SQ
How does a field accelerating relay prevent current excess that may occur because of adjusting the rheostat to change speeds?
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Please solve by pen and paper correctly step by step. Do not use chatgpt Or any AI tool.
Consider the circuit shown below,
Vac 0-
H
Vdc
ли
R1
R2
where R₁ = 2.2KQ, R₂ = 4.7KQ, C = 0.1uF, Vdc = +5V, and Vac = 3V peak f = 1KHz.
• Use superposition to calculate the DC voltage at point X; VDC =
•
Use superposition to calculate the AC (peak) voltage at point X; VAC =
Q2/ An air-filled rectangular waveguide is to be used to transmit signals at a carrier frequency of 6 GHz. Choose its dimensions so that the cutoff frequency of the dominant TE mode is 80% of the carrier frequency 6GHz and that of the TE01 is 70%.
Chapter 46 Solutions
EBK ELECTRIC MOTOR CONTROL
Ch. 46 - Prob. 1SQCh. 46 - What physical characteristic distinguishes between...Ch. 46 - Prob. 3SQCh. 46 - What protection is available from excessive...Ch. 46 - How does a field accelerating relay prevent...Ch. 46 - Prob. 6SQCh. 46 - How may more steps of acceleration be added to a...Ch. 46 - Prob. 8SQ
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