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ECE
469 Power Electronics Laboratory The ECE 469 lab was made possible
by a donation from the Grainger Foundation, in honor of William W. Grainger
(B.S.'19) who founded the W.W. Grainger company in Skokie |
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Instructor: |
Prof. Philip Krein (krein at illinois.edu), Office hours: Wednesdays 1:30-3pm Room 50 (except 9/30, 11/10) |
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Teaching Assistants: |
Pradeep Shenoy (pshenoy2), Office hours: Tuesdays 9:30 to 10:30 a.m. Room 50 |
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Marco Tavernini (mtavern2), Office hours: Wednesdays 3:00 to 4:00 p.m. Room 50 |
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Ali Bazzi (abazzi2), Office hours: Tuesdays 4:00 to 5:00 p.m. Room 50 |
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Required Text: “ECE 469 – Power Electronics Laboratory, Laboratory Information Guide,” Version 2.3a, Krein 2008. To be provided free of charge |
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Recommended Text: “Elements of Power Electronics,” Krein, Oxford University Press |
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Prerequisites: Credit or current registration in ECE 464 and credit in ECE 443 or consent of instructor. |
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Purpose: To experience practical implementations of power electronics, to learn more about the applications of power electronics, and to improve engineering documentation and reporting skills. |
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> At least
one TA will be available during regular lab hours and on Fridays 1 p.m. to 3
p.m. if you wish to work on your project. Please schedule appointments with
TAs for other times. |
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PRE-LAB #1 due
in lab week of August 31 PRE-LAB #2 due in lab week of September 7: A battery is to be
charged with a diode rectifier bridge. The bridge input is a 60 Hz
voltage source, 25 V rms. The battery is rated at 12 V. Since
both are voltage sources, a four-ohm resistor has been placed in series with
the battery. Sketch the battery current. What is its average
value? PRE-LAB #4 due in lab the week of September 21 PRE-LAB #4 SolutionPRE-LAB #8: carry out the assignment as given on p. 68 of the lab manual. PRE-LAB #8 SolutionPRE-LAB #9: Refer to Fig. 1 on p. 79, and the text above it. A core is tested at a frequency of 1200 Hz. The measured value of voltage across the 0.1 ohm resistor is 0.1 V peak-to-peak. The value of capacitor voltage is 0.8 V peak-to-peak. The core has a magnetic path length of 10 cm and area of 1 cm^2. What are the peak values of B and H for this situation? PRE-LAB #9 SolutionPre-Lab #10: Refer to the lab manual: preliminary design for your assigned converter. Pre-lab #11: Design refinement for your assigned converter. Given a desired operation at maximum load that yields better than 85% efficiency (or more), compute general requirements for switch voltage, current, and on-state resistance requirements. What inductor values and currents are needed? What capacitor values and voltages are needed? Our objectiove is to build a discrete configuration at this point. The pre-lab is due when you arrive in lab, which can be at your scheduled time or during one of the supervised open lab times. |
Presentation points:
-- Plan on at most 7 minutes for your final project presentations (groups of 3 can plan for 10 minutes).
-- Cover key points: your design specifications, the solution you chose, and how it worked. Be sure to show operation over the whole specified range, and present efficiency and other important operating aspects.
-- Work with your lab group to find suitable ways to divide up the material and present it. Please do not try to use more than five PowerPoint slides.
-- Be ready to answer a few questions.
-- We will plan to have two or three groups present during the Monday session on December 7. Other groups will present between 12-3pm on December 9. These will be scheduled to avoid student conflicts.
Meeting Times:
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Section |
Day / Time |
Location |
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Lecture AL1 |
Monday 12:00PM - 12:50PM |
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Lab AB1 |
Tuesday 9:30AM - 12:20PM |
50 Everitt Lab |
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Lab AB3 |
Tuesday 2:00 PM - 4:50PM |
50 Everitt Lab |
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Lab AB2 |
Wednesday 12:00 PM - 2:50PM |
50 Everitt Lab |
Course Outline:
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Part One |
Ac-Dc Converter circuits |
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Experiment 1: Basic Rectifier Circuits |
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Experiment 2: Single-Phase Conversion |
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Experiment 3: Poly-Phase Conversion |
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Part Two |
Dc-Dc Converter circuits |
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Experiment 4: One-Quadrant Converters |
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Experiment 5: Converters for Motor Drives |
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Part Three |
Dc-Ac Converter circuits |
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Experiment 6: Voltage-Sourced Inverters |
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Experiment 7: Pulse Width Modulation Inverters |
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Part Four |
Passive Components |
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Experiment 8: Models for Real Capacitors and Inductors |
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Experiment 9: Magnetics |
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Part Five |
Design Project |
Useful Links