3/10/2015
Consumer Power Electronics
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
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Better name – Transistor Circuit Analysis
Analysis of specific circuit elements
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Bipolar Junction Transistors
Field Effect Transistors
Operational Amplifiers
SCR/IGBT/UJTs
Hydraulics and Pneumatics
Circuit Diagnostics
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Electronic Devices
and Circuit Theory
◦ Boylestad and
Nashelsky
◦ 11th edition
◦ ISBN 0-13-262226-2
◦ No workbook
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Available NOW in
the bookstore
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Student version of Matlab
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Available on ECET website
www.pnc.edu/te/ecet
Guides available on class website
Version to be installed on lab PCs
Parts kit / hand tools from previous classes
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Capabilities
◦ Graphing
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TI-85 suggested
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www.faculty.pnc.edu/jlerne00/ECET257
Available
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All power points (PDF)
All labs
Syllabus
Homework question list
Class schedule
ECET 257 Consumer Power Electronics
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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 prior notice during lectures
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Labs (B083)
◦ Parts kit available
◦ On website- check ahead of lab
◦ Open start time, flexible days (tues or thurs)
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Practicals
◦ Timed, Individual labs
◦ Given on specific days
◦ Sign up two weeks prior to practical
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Exams
ECET 257 Consumer Power Electronics
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Complete form attached to syllabus
Required to post grades during semester
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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).
ECET 257 Consumer Power Electronics
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Part-time
Here before class
Email – jlerne00@pnc.edu
◦ Mention ECET 257 in the subject line
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ECET 157 Review
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ECET 157 Review
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ECET 157 Review
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Normal diode
◦ Conducts in forward bias
at knee voltage
◦ No current flow in reverse
mode
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Zener
◦ Conducts in forward bias
at knee voltage
◦ Conducts in reverse bias in
zener region
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For a specific applied DC
voltage (VD) the diode has
a specific current (ID) and
a specific resistance (RD).
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In the forward bias region:
The resistance depends on the amount of current (ID) in the diode.
The voltage across the diode is fairly constant (26 mV for 25C).
rB ranges from a typical 0.1  for high power devices to 2  for low
power, general purpose diodes. In some cases rB can be ignored.
In the reverse bias region:
The resistance is effectively infinite. The diode acts like an open.
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AC resistance can be
calculated using the
current and voltage values
for two points on the diode
characteristic curve.
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Diodes only conduct when forward biased
DC voltage = 0.318Vm
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Bridge conducts on both sections of AC
waveform
DC Voltage = 0.636Vm
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Center-Tapped Transformer Rectifier
◦ Requires two diodes and a center-tapped
transformer
◦ VDC = 0.636Vm
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Testing Diodes
◦ Multimeter Dedicated Function
◦ Normal Values based on material of diode
 Gallium arsenide (GaAs) ≅1.2 V
 Germanium (Ge) ≅ 0.3 V
 Silicon (Si) ≅ 0.7 V
For further review of
diodes please review
Ch. 1 and 2
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“If you take a bale of hay and tie it to the tail of
a mule and then strike a match and set the
bale of hay on fire, and if you then compare
the energy expended shortly thereafter by the
mule with the energy expended by yourself in
the striking of the match, you will understand
the concept of amplification.”
-William Shockley,
co-creator of the transistor
Purdue University, PNC, and this instructor do not condone or encourage the misuse or abuse of any
animals or misuse of fire.
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