web-based delivery of the first course in power electronics amman – jordan december 16-17
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Web-Based Delivery of the First Course in Power Electronics Amman – Jordan December 16-17. Issa Batarseh School of Electrical Engineering and Computer Science University of Central Florida. Orlando, Florida 32816 Email: [email protected]. Introduction. - PowerPoint PPT PresentationTRANSCRIPT
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Web-Based Delivery of the First Course in Power Electronics
Amman – JordanDecember 16-17
Issa Batarseh School of Electrical Engineering and Computer Science
University of Central Florida.Orlando, Florida 32816
Email: [email protected]
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Introduction The role of technology in education has never been
greater: capabilities, cost. The Internet has been utilized as the ideal medium
to create platforms for students to use for its wide availability.
There is a pressing need for developing original web-based multi-media learning environment.
None of today's web-based educational tools allow students to perform a generalized and real time simulation of engineering problems in the interactive web-based instructional environment.
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Introduction(cont.) Power electronics is the fastest growing area in
electrical engineering. US universities have not kept pace with the growth
of power electronics field, and are not educating students in sufficient numbers
The writing of this paper is motivated primarily by the current multimedia delivery efforts underway at the University of Central Florida (UCF) to develop undergraduate and graduate curriculum in power electronics.
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Methods of Delivery
Classroom (Live) fixed in time and
location
Distance any time any place meets needs of non-
traditional students maintain classes at
branch campuses
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Methods of Distance Learning
Textbooks Radio/TV By Correspondences Taped Lectures Video Streaming Interactive TV Internet/web Based live feeding
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Internet Based
Universal access Moderate cost (free to students) Complement classroom instruction and make
learning easier. Learn a new technology that is here to stay Potential for improving critical thinking and
problem solving skills. interaction between students and faculty. Highly interactive via Web and e-mail Foster independence and autonomy among
students. Higher students satisfaction. High participation in discussion.
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Internet Based Courses (cont.)
Potential Problems Low bandwidth (delays in transmitting audio and
video information). Learning curve, hardware and software Budgetary restrictions. Students with limited writing and communication
skills are at disadvantage. Possible delays due to technical difficulties.
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Web Based Power Electronic Courses
8 Universities were surveyed by email:
Limited web based activities Documentation/information Limited interaction with students Lack of design on line Lack of simulation on line
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Web Based Power Electronic Courses
Table I Summary of on-line PE Survey 1. No. of Institutions offer P.E. Courses 7 2. No. of on-line PE Courses 6 Fully on the web courses 4 3. List of Multimedia Tools - Information about the course - Full Lectures on line
- Homework Assignments are provided on line - Homework Assignments are taken on line - Exams/Quizzes are given on line - Sample exams online. - Student profiles - Design on-line
7 5 7 1(soon) 2 4 2 0
4. What form if interaction do you have with your students: - Email - Bulletin boards - Videos
5. Do you use Web-CT for your courses?
7 4 4 2+1(soon)
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UCF Experience
Web-CT has been the main platform used to develop courses on line.
Courses are either:– (W) Fully on the Web to reduce classroom seating– (M) Mixed-mode course– (E) Web Enhanced in which the web is used to
enhance course delivery. The Fully on the Web Courses are offered fully via
the web through which students are not required to attend the class.
Mixed/Web-Enhanced Courses students use both live lectures and the web to go through the course.
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UCF Experience (cont.) FEEDS: Florida Engineering Educational Delivery
System College of Engineering and Computer Science has
been involved with video-taped classes for more than 15 years.
UCF had 120 classes at 51 sites .(The Florida State System has more than 484 classes at 156 sites)
By combining both the Internet and the existing videotaped delivery, the program was able to offer courses to more students at more remote locations.
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Power Electronics Courses At UCF, two power electronics courses are offered
periodically;– EEL 5245 Power Electronics I– EEL 6246 Power Electronics II
A third course that discusses dynamic modeling and controller design is offered as– EEL 6271 Advanced Electronics I
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Power Electronics CoursesTable II Detailed course outlines for First Course in Power Electronics
POWER ELECTRONICS I
I. Introduction 1.1 Overview of the Course 1.2 Why Power Electronics ? 1.3 Overview and Applications of Power Electronics
II. Review Material 2.1 Modern Switching Semiconductor Devices (Diodes, BJTs, MOSFETs, Thyristors, GTOs, IGBTs) 2.2 Switching Characteristics 2.3 The Ideal Switch and Switching Functions 2.4 Magnetics: materials and properties 2.5 Transformers 2.6 Three-phase Systems
III. DC-TO-DC Switch-mode Converters 3.1 Concept of Source Conversion: source <--> load 3.2 Linear Regulators 3.3 Switch-mode Converters
3.3.1 Non-Isolated Switch-mode Converters:Continuous Conduction Modes (CCM).Discontinuous Conduction Modes (DCM).
a) Buck Converterb) Boost Converterc) Buck-Boost Converter
d) Cuk Converter
3.3.2 Isolated Switch-Mode Power converters a) Single-ended Isolated Forward Converter b) Double-ended Isolated Forward Converter c) Flyback converter
IV. DC-to-AC Inverters 4.1 Principle of Operation 4.2 Single-phase Inverters 4.3 Equal Pulse Modulation 4.4 Sinusoidal PWM 4.5 Three-phase Inverters
V. Diode Circuits and Rectifiers (AC-to-DC Conversion) 5.1 Rectifier Concepts 5.2 Single Phase Half- and Full-wave Diode Rectifiers with:
a) Resistive loadb) Inductive loadc) Capacitive load
5.3 Three-phase Full-wave Rectifiers
VI. Phase-Controlled Rectifiers (AC-to-DC Conversion) 6.1 Natural and Forced Commutation Concepts 6.2 Principle of Phase-Controlled Converters
6.3 Single-phase Full Converters
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The First Power Electronics Course: Fall 2000
The Web Site: http://reach.ucf.edu/~eel5245/ The site contains;
– detailed course outline, – lectures, – homework assignments, – sample exams, – quizzes on line, – exam on line – Student information/course grades
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Logging on:
Figure 1 Welcome page for the course, with the login screen shown.
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Fig. 2(a) Student view of the main page of the course Web-CT site.
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Fig. 2(b) The instructor and editor view of the course Web-CT site.
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Fig. 3 The course home Web Site for the class
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Quizzes and Exams;
The Web-CT environment allows student tracking and providing quizzes and exams on line.
Developed quizzes and one exam on-line.
This makes it possible for students to take open-book, open-note exams anywhere and any time within the time window set by the instructor.
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Future Trends; Growth in power electronics education and
research will continue to grow in the near future To develop an effective power electronics
education it is important to have simulation and hardware laboratory support in conjunction with the course material.
Web-based education must include more on-line course offerings advanced graphical-user-interface tools, on-line exams, interactive discussion, and even web-based interactive circuit and system simulations.
Additional work is needed in developing web-based interactive simulation/design and experiential learning.
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On-Line Power Electronics Simulation:
Computer simulation and computer tools play very important role delivering effective power electronics education.
In UCF; Students will have free access that will allow them through a GUI to be able to design build and simulate circuit engineering problems on line.
This will provide an innovative method for interactive teaching and on-line design testing.
The on-line Pspice computer simulation of engineering problems will help students better understand abstract engineering principles, and will have multiple opportunities to solve engineering design problems.
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Example of web-based Interactive Lectures
Interactive Power Electronics
Seminar (iPES)
By
Swiss Federal Institute of Technology Zurich
(Ref. #12)
http://www.ipes.ethz.ch