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EE 123
POWER ELECTRONICS
SYLLABUS
Summer 2024
CATALOG DESCRIPTION
Prerequisites: EE 100A, EE 123 online section: enrollment in the Online Master-in-Science in Engineering.
Units: 4, Lecture: 3 hours, Laboratory: 3 hours
Covers the study of power semiconductor devices. Includes magnetic circuits and components; switch mode converters and power supplies; and single, three-phase, pulse width modulation, and resonant pulse inverters. Addresses voltage controllers; direct current and induction motor drives; and design of motion control drive circuits for robotic and industrial automation systems. Credit is awarded for one of the following EE 123 or EE 286C.
TOPICS
Power Quantities and Calculations
Transformers and Diode Rectifiers (Half-Wave and Full-Wave)
Power Semiconductor Devices
- Power Diodes: general, fast-recovery, Schottky;
- Power Switches: thyristors (SCR, GTO, MCT)
- Power Transistors: BJT, MOSFET, IGBT
Switching DC-DC Converters and DC Power Supplies
- CCM and DCM Switching Analysis
- Non-isolated DC-DC Converters - Buck, Boost, Buck-Boost, Cuk
- Isolated DC-DC Converters – Flyback and Forward
DC-AC Inverters
- single phase bridge inverters
AC-DC Converters AC-AC Converters
Series and Parallel Combination of Components and Circuits
Course Calendar
|
Date |
Lectures |
HW Due |
Laboratory |
|
Mon, 07/29 |
1 (live). Introduction to Power Electronics |
|
|
|
Tue, 07/30 |
2 (live). Power and Power Source Characterization |
|
Lab 0. LTspice Installation (ungraded, no lab report) |
|
Wed, 07/31 |
3 (pre-rec). Half-Wave Rectifiers with Resistive Loads |
|
|
|
Thu, 08/01 |
4 (live). Half-Wave Rectifiers with Capacitive Loads |
|
Lab 1. Power Characterization, Regular and Controlled Rectifiers |
|
Sat, 08/03 |
|
HW 1, 11:59 pm |
|
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Mon, 08/05 |
5 (pre-rec). Half-Wave Rectifiers with Inductive Loads |
|
|
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Tue, 08/06 |
6 (live). Full-Wave Bridge Rectifiers |
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Lab 2. Half-Wave Rectifiers and Commutation |
|
Wed, 08/07 |
7 (live). Full-Wave Rectifiers - Inductive Sources and RLC Loads |
|
|
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Thu, 08/08 |
8 (pre-rec). Phase- Controlled Rectifiers and Inverters |
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Lab 3. Full-Wave Bridge Rectifiers |
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Sat, 08/10 |
|
HW 2, 11:59 pm |
|
|
Mon, 08/12 |
9 (live). Voltage Doublers |
|
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Tue, 08/13 |
10-1 (pre-rec). Intro to Switching Power Supplies, Buck Converters |
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Lab 4. Phase-Controlled Rectifiers and Inverters |
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Wed, 08/14 |
10-2 (pre-rec). Intro to Switching Power Supplies, Boost Converters |
HW 3, 3:00 pm |
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Thu, 08/15 |
MIDTERM |
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Mon, 08/19 |
11 (pre-rec) Buck-Boost Converters. DCM Operation in Buck and Boost Converters |
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|
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Tue, 08/20 |
13 (live). Magnetic Circuits and Transformers |
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Lab 5. Switch-Mode DC-DC Converters |
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Wed, 08/21 |
14-1 (live). Flyback Converters |
HW 4, 11:59 pm |
|
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Thu, 08/22 |
14-2 (pre-rec). Forward Converters |
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Lab 6. Flyback and Forward DC-DC Converters |
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Mon, 08/26 |
15 (pre-rec). AC Voltage Controllers |
HW 5, 11:59 pm |
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Tue, 08/27 |
16 (live). Inverters - DC-AC Converters |
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Lab 7 (optional). DC-AC and AC-AC Line Inverters |
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Wed, 08/28 |
17 (pre-rec). Combination of Non-Linear Components |
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Thu, 08/29 |
18 (live). Review |
HW 6, 3:00 pm |
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Fri, 08/30 |
FINAL EXAM 8 am - 10 am |
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HOMEWORK
Homeworks will be assigned every other day, there are six homeworks in total. Homework statements along with due dates are shown in the calendar above and will also be posted in Assignments/Homeworks section in eLearn and Gradescope. Keep in mind that even though you need to solve all required problems in homeworks, only two randomly selected homeworks will be actually chosen for grading. Non-required problems are indicated inside the homework assignments, and won’t be graded. Use them for practice purposes. Solutions to all problems, required or not, will be posted under corresponding homework assignments in Canvas. In general, homeworks will be due at 11:59 pm on the due dates except homeworks 3 and 6 that will be due at 3 pm. This is because I will need to post solutions before the exams on the following days. Discussion of homework problems with the instructor, TA, and/or classmates will be done via Piazza. All homeworks must be completed individually and submitted for grading via Gradescope, not by email. You can use your mobile phone to scan your handwritten solutions and save them in a pdf format, for example, with CamScanner app (https://www.camscanner.com). A short tutorial on Gradescope usage is provided under Assignments folder in eLearn.
No late homework will be accepted.
LABORATORY EXPERIMENTS
All labs are LTspice software based and will need to be conducted at your own location. Lab manuals can be found under Modules/Laboratories section in eLearn. Discussion of lab experiments with TA, and/or other students is encouraged. Usage of Piazza is encouraged for this purpose. Laboratories are based on LTspice software from Linear Technology, a free and very powerful Spice simulation environment, https://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html . Additional LTspice power electronics library specifically designed for EE123 can be found in eLearn/Canvas under Modules/Laboratories section. Laboratories will cover majority of power electronic circuits discussed in class.
You are expected to read the lab descriptions, and complete the pre-lab before starting lab assignments.
Lab reports are to be submitted for grading within the time-frames indicated in the lab assignments via Gradescope, not by email. Late submission will lead to a 10-point score deduction. Guidelines for the lab report must be followed.
EXAMS
Midterm: ONLINE, Thursday, 08/15/2024 during regular lecture hours
Final: ONLINE, Friday, 08/30/2024, 8:00 a.m. – 10:00 a.m.
All exams are open book and notes, only printed and/or handwritten materials will be allowed on the test. Electronics version of notes, textbooks, etc. will be strictly disallowed. Exams will be proctored by our TA online. Make sure that your desk and you (arms and head) are visible by our TA at all times. Laptops/PC’s can only be used for delivering video to our proctor via Zoom software. Communication gadgets, tablets, cell-phones, etc. must be off. During tests, 3 min long breaks will be allowed with proctor permission. Make-up exams are possible only under circumstances of medical emergency or sickness