6/23/2015
AC Circuit Analysis
John C. Lerner, BS-ECET, CBET
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1999-2005 US Air Force
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2009 BS-ECET, PNC
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2008 Clinical Engineer, St. Anthony Health
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Also teach
• Biomedical Electronics
• Radiology Systems
Franciscan St. Anthony Health, Michigan City
ECET 207 AC Circuit Analysis, PNC
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Analysis of circuits using AC power
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Waveforms
Effect of R, L, and C components on circuits
Circuit and network theorems
Measurement of voltage, current, and phase
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Sinusoidal waveforms
Elements and Phasors
Series and Parallel AC circuits
Series-Parallel circuits
Network Theorems
Pulse waveforms
◦ RC response
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Mesh and Nodal Analysis
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Introductory Circuit
Analysis
◦ By Robert L.
Boylestad
◦ 12th edition
◦ ISBN 0-13-714666-3
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No workbook
Available NOW in
the bookstore
ECET 207 AC Circuit Analysis, PNC
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Available from Rodger, ECET
◦ Pay Bursar's office, bring Rodger receipt
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Needed by week 2
Contains all parts needed for ECET 207 labs
ALL LABS WILL BE PHYSICALLY BUILT
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Capabilities
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Graphing
Matrix
Complex Numbers
Polar/Rectangular forms
Your ability to use it
TI-85 suggested
“Lab 1”
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Student version of Matlab
◦ Available on ECET website
◦ www.pnc.edu/te/ecet
◦ Guides available on class website
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Digital Multimeter
◦ Hz, Ohms, Amps Voltage (DC and AC)
◦ Diode / Transistor testing suggested
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Hand tools from previous classes
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www.faculty.pnc.edu/jlerne00/ECET207
Available
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All power points (PDF)
All labs
Syllabus
Homework question list
Class schedule
ECET 207 AC Circuit Analysis, PNC
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Lecture
Homework
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Format on website, must be followed
Question list on website
Evens only assigned
Grading of homework
In-Class Quizzes
◦ Given without notice during lectures
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Labs (B083)
◦ Parts kit available
◦ On website- check ahead of lab
◦ Tues / Thurs 630 - 745
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Practicals
◦ Timed, Individual labs
◦ Given on specific days during lab session
◦ Sign up two weeks prior to practical
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Exams
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Due to scheduled service schools, there are
two weeks that no class will be held.
◦ I will be available via email (jlerner@pnc.edu)
◦ Labs are cancelled during this time
◦ Test 1 and 2 will be take-home
 All work must be shown for credit
◦ Ch. 16 (Series-Parallel Circuits) will not be covered
in lecture, but still on test
◦ November 12 – Both lab and lecture time will be
used to cover Ch. 20
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To reduce the propagation of errors, two
decimal points for all numbers is suggested
Engineering notation must be used on all
numbers
500,000 = 500E3 = 500k
0.005 = 5E − 3 = 5m
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Consequences of Cheating – Any of the
following are possible actions:
◦ Negative credit for the assignment.
◦ No credit for the assignment and loss of a letter
grade in the course
◦ A failing grade in the course
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Any occurrence may include a referral to the
Dean of Students for disciplinary action (see
the Student Handbook).
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Part-time
Here before class
Email – jlerner@pnc.edu
◦ Mention ECET 207 in the subject line
ECET 207 AC Circuit Analysis, PNC
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Device that stores
electrical energy
◦ Short term storage
◦ Rated in Farads
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May have polarity
◦ Electrolytic type
◦ Negative marked
FIG. 10.12 (a) electrolytic;
(b) polyester-film; (c)
tantalum.
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Basic construction
◦ Two conductors separated
by an insulator (dielectric)
FIG. 10.10 Air capacitor for Example 10.3.
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Larger plates permit an increased area for the
storage of charge, so the area of the plates should
be in the numerator of the defining equation.
The smaller the distance between the plates, the
larger is the capacitance, so this factor should
appear in the numerator of the equation.
Finally, since higher levels of permittivity result in
higher levels of capacitance, the factor should
appear in the numerator of the defining equation.
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FIG. 10.8 Demonstrating the effect of inserting a dielectric
between the plates of a capacitor: (a) air capacitor; (b) dielectric
being inserted.
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Device that converts
electrical energy to
magnetic fields
◦ Short term storage
◦ Rated in Henrys
◦ More efficient versions
have metal cores
FIG. 11.16 Defining the
parameters for Eq. (11.6).
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It is also sensitive to the number of
turns of wire in the coil as dictated by
the following equation and defined in
Fig. 11.16 for two of the most popular
shapes:
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FIG. 11.18 Air-core coil for
Example 11.1.
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FIG. 11.21 Relative sizes of different types of inductors: (a)
toroid, high-current; (b) phenolic (resin or plastic core); (c)
ferrite core.
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FIG. 11.20 Inductor (coil)
symbols.
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For more information on capacitors and
inductors, see chapters 10 and 11 in the
textbook.
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“I do not think there is any thrill that can
go through the human heart like that felt
by the inventor as he sees some creation
of the brain unfolding to success... Such
emotions make a man forget food, sleep,
friends, love, everything.”
Nikola Tesla
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