Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 27, Problem 5SQ
To determine
What will happen while the stop button is pressed and then the start button is pressed immediately, if the motoring is running?
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EXAMPLE 8.12 The E-MOSFET of Fig. 8.40 was analyzed in Example 7.10, with the
result that k = 0.24 × 103 A/V², VGS = 6.4 V, and ID = 2.75 mA.
a. Determine gm-
b. Find rd.
c. Calculate Z; with and without rd. Compare results.
d. Find Zo with and without ra. Compare results.
e. Find A, with and without rd. Compare results.
카
1 uF
Z
RE
912 V
Rp
• 2 ΚΩ
10 ΜΩ
HE
1 μF
ID (on) = 6 mA
VGS (on) = 8 V
VGS (Th) = 3 V
80s = 20 μs
Za
o Vo
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Chapter 27 Solutions
Electric Motor Control
Ch. 27 - Why is it desirable to remove the autotransformers...Ch. 27 - What is meant by an open transition from start to...Ch. 27 - Which of the following applies to an...Ch. 27 - How are reduced voltages obtained from...Ch. 27 - Prob. 5SQCh. 27 - What is a disadvantage of starting with...Ch. 27 - What is one advantage of using an autotransformer...
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