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525.725 - Power Electronics Course Homepage

Instructor Information

Dimosthenis Katsis

Email: katsisdc@ieee.org

Paul Sotiriadis

Email: pps@jhu.edu

Course Information

Course Description

This course covers the design and analysis of DC to DC switchingconverters. Topics include topology selection for variousapplications, steady state operation including continuous versesdiscontinuous operation, fundamentals of control loop design including both voltage mode and current mode control, fundamentals of magnetic design including how to minimize losses, input and output filterdesign, pulse-width modulation chip selection, diode and transistorpart selection and the associated effects of part non-idealities on the converter performance, and modeling of the converter. The complete process of converter design andimplementation is presented including requirement specification andtesting verification needed to evaluate the converter performance such as efficiency, regulation, line rejection, EMI/EMC measurements, and stability measurements. Two labs which will give the student hands-on experience with design and testing of a typical DC to DC converter are part of the course.

Prerequisites

525.424 Analog Electronic Circuit Design I or equivalent

Course Goal

To develop a sufficiently detailed understanding of the analysis and design of DC/DC converters that students can effectively design and/or specify converters for their own applications.

Course Objectives

  • To be able to perform steady state analysis of the major DC/DC converter toplogies including understanding of the voltage and current waveforms at each of the critical nodes.

  • To be able to accurately model the major DC/DC converter topologies, identify loss mechanisms, and predict performance metrics such as efficiency, etc. Mostly using simulation software
  • To be able to analyze and design magnetics (inductors and transformers) for DC/DC converter appications including understanding the complex interactions between loss mechanisms, saturation, size and weight, inductance, geometry, etc.
  • To be able to analyze dynamic performance of DC/DC converters and to design effective control loops that optimize frequency response, transient performance, and stability.

When This Course is Typically Offered

This course is typically offered at the Dorsey Center on Wednesday evenings from 7:30-10:10pm during the Spring semester.

Syllabus

Topics Covered

  • Power Semiconductors
  • Applications of Power Electronics
  • Introduction to PWM
  • Topologies: Buck
  • Topologies: Boost
  • Topologies: Flyback
  • Topologies: Inverter
  • Control
  • Analysis
  • Magnetics: Inductors
  • Magnetics: Transformers
  • Measuring Performance
  • Thermal Issues
  • System Design

Student Assessment Criteria

Homework (5 assignments) 25%
Mid-term Exam (take-home) 25%
Final Exam (take-home) 25%
Class Participation (including discussion postings) 25%

All homework is due within one week of its assignment. Late homework will not be accepted without the prior permission of the instructor.It is assumed that graduate students are adept at writing English and no points will normally be subtracted for English errors; in cases of exceptionally poor English points will be deducted. All external sources of information used to support must be appropriately referenced.

Computer and Technical Requirements

You need a web browser and web access. Details provided in class

  • AOL 7.0 (PC)
  • AOL 8.0 (PC)
  • AOL OSX (OSX)
  • Microsoft Internet Explorer 5.0, 5.5 and 6.0 (PC)
  • Microsoft Internet Explorer 5.1 (OS9, OSX.10.1)
  • Microsoft Internet Explorer 5.2 (OSX.10.1, 10.2, 10.3)
  • Netscape 6.2.x (PC and Mac)
  • Netscape 7.0 & 7.1 (PC & OSX)
  • Mozilla 1.5 & 1.6
  • Safari 1.2

To check if your browser will work with WebCT: http://webct.jhu.edu/webct/public/check_browser.pl
Technical information on WebCT can be found at http://www.cer.jhu.edu/index.cfm?pageID=289

List other software that may be required.

Example:

PDF Viewer:

You will need the free Adobe PDF viewer software to view PDF files in this course. Go to http://www.adobe.com/products/acrobat/readstep.html

Zip Software:

You will also need software for "zipping" and "unzipping" (compressing and uncompressing) files. Two popular shareware "zip" programs can be downloaded from the sites linked below:

For Windows - WinZip at http://www.winzip.com/
For Macintosh - ZipIt at http://www.maczipit.com/download.html

eLive!:

You will be using Adobe Connect, a web-based conferencing system, to participate in real time office hours. To use Adobe Connect, please perform a connection test on your computer to make sure your software is current by going to http://connect.johnshopkins.edu and selecting Connection Test. If you have any trouble connecting to an Adobe Connect meeting, please visit the Technical Support website at http://help.sset.jhu.edu/x/bIA7. After reviewing the contents of this site, if you still need assistance please e-mail connectsupport@jhu.edu or complete the online support form.

If you are a first-time EPP Online student, you will have an opportunity to test the Adobe Connect software during the week long mandatory EPP Online Orientation. Others can email EPP Online at epponline@jhu.edu if they are interested in attending one of the 30-minute online orientations to Adobe Connect.

Textbooks

Textbook information for this course is available online through the MBS Direct Virtual Bookstore.

Course Notes

There are no notes for this course.

Final Words from the Instructor

Come prepared with a topic you want to tackle in this course, whether from your job or general interest. We will work together to analyze a power electronic application within your interest.

(Last Modified: 10-30-2008 at 7:30:25 PM)