ELEC ENG 7049 - Power Electronics Systems

North Terrace Campus - Semester 2 - 2024

Characteristics of power electronic devices, switching characteristics of devices, power losses and thermal design. Classes of power converters and their operations: rectifiers; AC -AC Converters; DC-DC Converters; Inverters. Voltage and current source converters. Hard and soft-switching and resonant circuits. Power supplies (uninterruptible, switchmode) Advanced energy-efficient motor drives: review of motor theory, power electronic control principles, vector and servo drives (stepper, DC, induction, brushless PM and switched-reluctance). Modulation methods. Theory motor and drive selection and application. System design, implementation and control, and computer interfacing. EMI in Power Electronics Systems.

  • General Course Information
    Course Details
    Course Code ELEC ENG 7049
    Course Power Electronics Systems
    Coordinating Unit Electrical and Electronic Engineering
    Term Semester 2
    Level Postgraduate Coursework
    Location/s North Terrace Campus
    Units 3
    Contact Up to 4 hours per week
    Available for Study Abroad and Exchange Y
    Incompatible ELEC ENG 4059, ELEC ENG 3104
    Assumed Knowledge Undergraduate courses in electronic circuits and devices
    Course Description Characteristics of power electronic devices, switching characteristics of devices, power losses and thermal design. Classes of power converters and their operations: rectifiers; AC -AC Converters; DC-DC Converters; Inverters. Voltage and current source converters. Hard and soft-switching and resonant circuits. Power supplies (uninterruptible, switchmode)
    Advanced energy-efficient motor drives: review of motor theory, power electronic control principles, vector and servo drives (stepper, DC, induction, brushless PM and switched-reluctance). Modulation methods. Theory motor and drive selection and application. System design, implementation and control, and computer interfacing. EMI in Power Electronics Systems.
    Course Staff

    Course Coordinator: Associate Professor Nesimi Ertugrul

    Assoc. Prof Nesimi Ertugrul
    Email: nesimi.ertugrul@adelaide.edu.au
    Phone: 8313 5465
    Office: IW 3.54
    Course Timetable

    The full timetable of all activities for this course can be accessed from Course Planner.

    X
  • Learning Outcomes
    Course Learning Outcomes
    On successful completion of this course students will be able to:

     
    1 Recognise the components of power electronics and learn their key characteristics.
    2 Recognise the basic operation, losses and efficiency of the power electronics converters.
    3 Use various methods to analyse power electronics circuits.
    4 Develop a good insight about the practical issues in power electronics circuit design.
    5 Explain and demonstrate operational issues and limitations of practical converters in industrial applications.
    6 Explain the application requirements of converters in given applications.

     
    The above course learning outcomes are aligned with the Engineers Australia Entry to Practice Competency Standard for the Professional Engineer. The course develops the following EA Elements of Competency to levels of introductory (A), intermediate (B), advanced (C):  
     
    1.11.21.31.41.51.62.12.22.32.43.13.23.33.43.53.6
    C C C B B A C C B B
    University Graduate Attributes

    This course will provide students with an opportunity to develop the Graduate Attribute(s) specified below:

    University Graduate Attribute Course Learning Outcome(s)

    Attribute 1: Deep discipline knowledge and intellectual breadth

    Graduates have comprehensive knowledge and understanding of their subject area, the ability to engage with different traditions of thought, and the ability to apply their knowledge in practice including in multi-disciplinary or multi-professional contexts.

    1-6

    Attribute 2: Creative and critical thinking, and problem solving

    Graduates are effective problems-solvers, able to apply critical, creative and evidence-based thinking to conceive innovative responses to future challenges.

    3-6

    Attribute 4: Professionalism and leadership readiness

    Graduates engage in professional behaviour and have the potential to be entrepreneurial and take leadership roles in their chosen occupations or careers and communities.

    3
  • Learning Resources
    Required Resources
    A comprehensive set of course notes  will be made available on the course site. In addition, there will be LabVIEW-based computer simulations to facilitate your understanding and engage in applications and circuit operation of the course materials, which you can access and execute in your own time.


    Recommended Resources
    Although the course notes will provide you a comprehensive overview, I  can recommend the following textbooks as supplementary resources to enrich your learning experience:

    "Power Electronics: Converters, Applications, and Design" by Ned Mohan, Tore M. Undeland, and William P. Robbins.
    This book provides a comprehensive introduction to power electronics, with  an emphasis on practical applications, making it a good reference for  understanding electric drives and power systems.

    "Electric Motor Drives: Modeling, Analysis, and Control" by R. Krishnan.
    This book provides a thorough overview of electric drive systems with  detailed modeling and control strategies. It's especially useful for  understanding motor drives in depth.

    "Modern Power Electronics and AC Drives" by Bimal K. Bose.
    This book provides detailed insight into power electronics and AC drives.  It's written by a renowned expert in the field and offers a balanced  treatment of both theoretical concepts and practical aspects of electric drives and power systems.

    Please note that these textbooks are meant to supplement the course notes and not replace them. They provide  different perspectives and additional information that will be beneficial for your understanding of the course materials.
    Online Learning


    I will make extensive use of the course site and the communication, where you will find a comprehensive set of course notes, quiz
    questions, practice problems, and online assessment tools. In addition, all the lecture videos will be available for you to download and revisit at your convenience.

  • Learning & Teaching Activities
    Learning & Teaching Modes
    The course will be delivered primarily through lectures,
    supplemented by problem-solving tutorials to reinforce the content. You'll find
    all relevant course materials on the web site, including lecture notes, quizzes, and
    online assessments. I will also post recorded lectures for you to review at
    your convenience.

    Before each lecture, please read the corresponding lecture
    material and attempt the questions provided. This will enhance your
    understanding and preparedness for class discussions.

    Assessments in this course include three written quizzes,
    with questions drawn from lecture content, and one major assignment focusing on
    the analysis of a key component in Power Electronics, the DC/DC converter.
    These assessments are designed to reinforce your learning and understanding of
    the course materials.

    Please note that this course does not include a traditional
    practical component. Instead, I have provided LabVIEW-based virtual tools to illustrate circuit and motor drive operations.

    The final examination will cover all course content.

    Workload

    The information below is provided as a guide to assist students in engaging appropriately with the course requirements.

    The information below is provided as a guide to assist students in engaging
    appropriately with the course requirements.

    The information below is provided as a guide to assist students in engaging appropriately
    with the course requirements.This is a 3 unit course.

    The University expects students to spend around 156 hours of work for a 3 unit course. This
    corresponds to roughly 12 hours per week. The following breakdown is a guide
    only. Some students will need to spend more time, some less.
    Activity Contact Hours Non-Contact Hours Total hours
    Lectures 2h/wk 3 (prep&revise) 60
    Three
    quizzes
    3h 5 (prep&write-up) 15
    One
    major assignment
    1h 30 (prep&complete) 31
    Four
    on-line assessments
    4h 2 (prep&write-up) 8
    Final
    examination
    2h 20 (prep&write-up) 22
    TOTAL 136
    Learning Activities Summary
    ELECTRIC DRIVE SYSTEMS/POWER ELECTRRONICS SYSTEMS

    CONTENTS
    1. Introduction, Applications of Power Electronics
    1.1.1    Emerging Developments and Emerging Applications An Electric Circuit

    2. Power Electronics Circuit Basics
    2.1 Floating/Isolated Voltage Source Concept
    2.2 Basic Circuit Topologies, DC Source
    2.3 Diode Circuits with AC Supply (Rectifiers)
    2.3.1. Definitions Efficiency in Rectifiers:
    Voltage-Current
    Relationships in Main Passive Elements
    2.3.2.Capacitor Load
    2.3.3.Single Phase Bridge Rectifiers
    2.3.4 Further Remarks On Rectifier Circuits (Inrush Current in DC Link Capacitors)
    2.3.5 Diode with an AC Supply and an Inductive (R Plus L !)
    Si Schottky Barrier Diodes Versus Sic Schottky Barrier Diodes (Sic-Sbd)

    3. “Powers” in Power Electronics
    3.1 Revisiting Type of Powers AC Circuits (Sinusoidal Steady-State!)
    3.2 Types of Powers in Power Electronics and Power Factor
    3.3 Instantaneous and Average Powers
    3.4 RMS (Effective) Current and Voltage
    3.5 RMS Values in Conduction Losses and Switching Device Ratings
    3.6 Harmonics
    3.6.1 Frequency and Harmonic Spectrum

    4. Three Phase Supply : Definitions

    5. Three Phase Diode Rectifiers
    5.1 Three-Phase Half-Wave Diode Rectifier (Resistive Load)
    5.2 Three-Phase Full-Wave Bridge Rectifier (Resistive Load)
    5.3 Features of the DC Link Capacitor in Rectifiers
    5.4 Preliminary Study About “Inverter” Operation !

    6. Switching Devices
    6.1 Thyristor, SCR (Silicon Controlled Rectifier)
    6.2 Transistors (BJT, MOSFET, IGBT)
    6.3 Remarks on Hard/Soft Switching and Stray Inductance in Converter Topologies
    6.4 Switching Capacitive and Inductive Loads

    7. DC-DC Converters, Switched Mode Power Supplies
    7.1 Step-Down (Buck) Converter
    7.2 Step-Up (Buck) Converter
    7.3 Operating Quadrants In DC-DC Converters

    8. Inverters (DC to AC Converters)
    8.1. Single Phase Inverter (H-Bridge)
    8.2. Three Phase Inverters (Full-Bridge)
    8.3. General Structure of Voltage and Current Source Inverters
    8.4 Isolated Gate-Control Signals in Inverter Topologies

    9. Electric Motors and Motion Control
    9.1. Principles of Electric Motors
    9.2 An Overview of Electric Motor Types
    9.3 Brushless Permanent Magnet Ac Motors
    9.3.1 DC Motors (With Brush)
    9.3.2 Induction (Asycnhronous) Motors
    9.3.3 Brushless Permanent Magnet AC Motors
    9.3.4 Stepper Motors and Control
    9.3.5.Switched Reluctance Motors and Control
    9.4 Motion Control, Servo Drives and Selection Criteria
    9.4.1 Motor Control Principles
    9.4.2 Servo Motor Drives
    9.4.4 Torque Speed Characteristics and 4-Quadrant Operation
    9.4.5 Breaking Electric Motors
    9.5 Selection and Sizing of Electric Motor
    9.6 Isolation and Feedback Sensors Used In Motor Drives
    9.6.1 Summary and Selection Criteria of the Feedback Devices

    10. Summary of Applications, Future and Other Issues
    10.1 Switch Capabilities and Applications
    10. 2 Electromagnetic Compatibility
    10. 3 Selection Criteria of the Motion Controllers
    10. 4 Internet of Things (IoT) in Power Electronics

    Specific Course Requirements
    None
  • Assessment

    The University's policy on Assessment for Coursework Programs is based on the following four principles:

    1. Assessment must encourage and reinforce learning.
    2. Assessment must enable robust and fair judgements about student performance.
    3. Assessment practices must be fair and equitable to students and give them the opportunity to demonstrate what they have learned.
    4. Assessment must maintain academic standards.

    Assessment Summary
    Assessment Task Weighting (%) Individual/ Group
    Formative/ Summative
    Due (week)*
    Learning outcomes
    Quiz 1,2,3 30 Individual
    Summative
    See timetable
    1. 2. 3. 4. 5. 6.
    1 Major assignment 20 Individual
    Summative
    See timetable
    1. 2. 3. 4. 5. 6.
    On-line assessments 1,2,3,4 12 Individual
    Summative
    See timetable 1. 2. 3. 4. 5. 6.
    Final examination 38 Individual Summative End of semester 1. 2. 3. 4. 5. 6.
    * The specific due date for each assessment task will be available on MyUni.
     
    This assessment breakdown is registered as an exemption to the University's Assessment for Coursework Programs Policy. The exemption is related to the Procedures clause(s): 1. a. i    1. a. ii    1. a. iii    1. b. 3.    1. c.   

    Assessment Related Requirements
    None
    Assessment Detail
    Please refer to the time table, assessment components given above and possible instructions that will be given each week..
    Submission
    Please refer to the instructions for assessment components that will given each week.
    Course Grading

    Grades for your performance in this course will be awarded in accordance with the following scheme:

    M10 (Coursework Mark Scheme)
    Grade Mark Description
    FNS   Fail No Submission
    F 1-49 Fail
    P 50-64 Pass
    C 65-74 Credit
    D 75-84 Distinction
    HD 85-100 High Distinction
    CN   Continuing
    NFE   No Formal Examination
    RP   Result Pending

    Further details of the grades/results can be obtained from Examinations.

    Grade Descriptors are available which provide a general guide to the standard of work that is expected at each grade level. More information at Assessment for Coursework Programs.

    Final results for this course will be made available through Access Adelaide.

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    SELTs are an important source of information to inform individual teaching practice, decisions about teaching duties, and course and program curriculum design. They enable the University to assess how effectively its learning environments and teaching practices facilitate student engagement and learning outcomes. Under the current SELT Policy (http://www.adelaide.edu.au/policies/101/) course SELTs are mandated and must be conducted at the conclusion of each term/semester/trimester for every course offering. Feedback on issues raised through course SELT surveys is made available to enrolled students through various resources (e.g. MyUni). In addition aggregated course SELT data is available.

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  • Policies & Guidelines
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