ECE 481: Power Electronics

Prof. Daniel CostinettDepartment of Electrical Engineering and Computer Science

University of Tennessee KnoxvilleFall 2017

ECE 481: Power ElectronicsInstructor: Prof. Daniel Costinett

Office: MK502Telephone: (865) 974 3572Email: dcostine@utk.edu

Please use [ECE481] in the subject line for all course related e mails.

Office Hours: W 12:30 1:30pm, T 3:00 4:00pm

Course MaterialsTextbook:

Erickson and Maksimovic, Fundamentals of PowerElectronics, second edition, Kluwer Academic Publishers,ISBN 0 7923 7270 0Available through campus bookstore, online vendors, oronline through UT libraries

Course Websitehttp://web.eecs.utk.edu/~dcostine/ECE481Includes lectures slides, handouts, supplemental notes,homework assignments, course announcements

AssignmentsHomework (35%)

Due at beginning of class on date listed on LectureSchedule web page (Fridays)No late work accepted except in cases ofdocumented emergenciesCollaboration is encouraged on all homeworkassignments but must turn in your own work

Midterms and Labs (35%)Final (30%)

Lab SequenceHands on experience testing and controlling GaN basedconverter3 lab sequence in modeling, open loop control and analysis, andclosed loop controlCompleted in groups of 2 3 outside of normal lecture hours

ECE 481 vs ECE 599Students enrolled in ECE 599 will haveadditional homework and exam problemsGrading

Separate curving for ECE 481 and ECE 599Extra credit is added to final grade after anycurving

How to Succeed in ECE 481Attend all lectures

Participate; ask questions or ask for clarificationRead textbook for additional explanationComplete all homework assignments

Attempt homework alone prior to collaboratingReview and understand mistakes~12 assignments for 35% of the grade

Power Electronics Courses at UTK

ECE 325Electric Energy System

Components

ECE 481Power Electronics

ECE 482Power Electronic

Circuits

ECE 523Power Electronics and

Drives

ECE 525Alternative Energy

Sources

ECE 623Advanced Power

Electronics and Drives

ECE 625Utility Applications ofPower Electronics

ECE 626Solid State PowerSemiconductors

Junior Senior Graduate

ECE 581High Frequency Power

Electronics

Undergraduate Research in Power Electronics

Opportunity for paid (hourly) undergraduate researchdeveloping SiC microgrid converters

o Testing of high voltage transistors and controllerso Software for controlling microgrid converters

Timeframe: immediate start, continues through SpringsemesterContact Professor Fred Wang for detailsFred.wang@utk.edu

Introduction to Power Conversion

Example Server Power Distribution

Example VRM Design

Example VRM Design

mIVR

out

outeq

eqR

Example VRM Design

out

outg

outgout

IVV

R

RIVV mIVR

out

outeq

eqR

Variations in Load

out

out

outgout

VV

RIVV

Control is Invariably Required

Linear Regulator

Linear Regulator

in

in

outgggin

PP

IVIVP

out

out

outoutout

PP

IVP

in

out

PP

A High Efficiency Converter

Devices Available to the Circuit Designer

Devices Available to the Circuit Designer

Devices Available to the Circuit Designer

Power Loss in an Ideal Switch

Use of SPDT Switch

Controlling Duty Cycle

Addition of Low Pass Filter

Duty Cycle Control

<Vs>

Vs

D

Vg

Low Pass Filter

Load

Control System for Voltage Regulation

Dynamic Performance

Single Phase Inverter

Power Electronics Overview

Some Power Electronics Applications

Power Transmission: Saturable Reactor

EVs: Integrated Converter

Traditional 2-stage drivetrain topology

Combined isolated/non-isolated topology

5kW Scaled-Down Converter Prototype

Full Power, 3D-Printed Module

Renewables: 2kW Power Dense Solar Inverter

CAD Model of Power-Dense Design

Protoype 2kW Solar Inverter Commercial Product Size Comparison

Thermal Test at Full Power

3.8cm

3.8cm

Powered entirely bycommercial 5.8GHz WiFiadapterAble to operate with ~5μWpower using only off the shelfcomponentsAble to operate down to100nW using a custom IC

Medical Devices: RF Energy Harvesting

Pout boostPout boost

Popovic, Z.; Falkenstein, E.A.; Costinett, D.; Zane, R., "Low Power Far Field Wireless Powering for Wireless Sensors," Proceedings of the IEEE , vol.101, no.6,pp.1397,1409, June 2013Paing, T.; Falkenstein, Erez; Zane, R.; Popovic, Z., "Custom IC for Ultralow Power RF Energy Scavenging," Power Electronics, IEEE Transactions on , vol.26, no.6,pp.1620,1626, June 2011

Mobile Electronics

Mobile Electronics

RFPA,LNA

Power Mgmt IC

Power Semiconductors,Inductors

Wearable Electronics: Medical SensorVarious biological markers can now be sensedthrough noninvasive methodsPulse, water content, GSR, blood glucose levels,oxygen content, etc.Precision integrated power electronics and lowpower circuit design techniques needed for futureimplementations

Part I: Converters in Equilibrium

Part I: Converters in Equilibrium

Switch Realization: Semiconductor Devices

Part II: Converter Dynamics and Control

Part II: Converter Dynamics and Control

Part III: Magnetics

Part III: Magnetics