Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Textbook Question
Chapter 12, Problem 5P
Find the reluctance of a magnetic circuit if a magnetic flux
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An RLE load is operating in chopper circuit from a 500 V de source as shown in Fig. (I) For
R = 0, L = 0.064 and constant E, the duty cycle is 0.2
(a) Derive the expression for the lo(max) and lo(min) for type A chopper, supplying RLE load.
Also, derive the expression for The maximum peak to peak ripple current.
(b) Find the chopping frequency to limit the amplitude of load current excursion to 10 A.
Fig.(1)
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Q1) An RLE load is operating in chopper circuit from a 500 V dc source as shown in Fig.(1) For
R=0, L= 0.064 and constant E, the duty cycle is 0.2
(a) Derive the expression for the lo(max) and lo(min) for type A chopper, supplying RLE load.
Also, derive the expression for The maximum peak to peak ripple current.
(b) Find the chopping frequency to limit the amplitude of load current excursion to 10 A.
Vs
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R
Fig.(1)
E
04)
A converter is feeding an RL load as shown in Fig. 2 with Vs = 220 V, R = 52, L = 7.5 mH,
f=1 kHz, d=0.5, and E=0 V. Calculate (a) the minimum instantaneous load current (b) the peak
instantaneous load current, (c) the maximum peak-to-peak load ripple current, (d) the average value
of load current la, (e) the rms load current lo, (f) the effective input resistance Ri seen by the source,
(g) the rms chopper current, and (h) the critical value of the load inductance for continuous load
current.
Chopper
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500000
R
Fig.2
LL
Chapter 12 Solutions
Introductory Circuit Analysis (13th Edition)
Ch. 12 - Using Appendix E, fill in the blanks in the...Ch. 12 - Repeat Problem 1 for the following table if...Ch. 12 - For the electromagnet in Fig. 12.34 a. Find the...Ch. 12 - Which section of Fig. 12.35-(a), (b), or (c)-has...Ch. 12 - Find the reluctance of a magnetic circuit if a...Ch. 12 - Prob. 6PCh. 12 - Find the magnetizing force H for Problem 5 in SI...Ch. 12 - If a magnetizing force H of 600 At/m is applied to...Ch. 12 - For the series magnetic circuit in Fig. 12.36,...Ch. 12 - Find the current necessary to establish a flux of...
Ch. 12 - a. Find the number of turns N1 required to...Ch. 12 - a. Find the mmf (NI) required to establish a flux...Ch. 12 - For the series magnetic circuit in Fig.12.40 with...Ch. 12 - a. Find the current I required to establish a flux...Ch. 12 - Prob. 15PCh. 12 - Determine the current I1 required to establsh a...Ch. 12 - a. A flux of 0.210-4Wb will establish sufficient...Ch. 12 - For the series-parallel magnetic circuit in Fig....Ch. 12 - Find the magnetic flux established in the series...Ch. 12 - Prob. 20PCh. 12 - Note how closely the B-H curve of cast steel in...
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