ELEC ENG 3112 - Electric Drive Systems M

North Terrace Campus - Semester 2 - 2023

This course introduces power electronics and electric drive systems. It includes the following topics. Characteristics of power electronic devices and their switching performance, power losses and thermal design. Classes of power converters: rectifiers; AC-AC converters; DC-DC converters, inverters. Voltage and current source converters. Hard and soft-switching and resonant circuits. Power supplies (uninterruptible, switched mode). Advanced energy-efficient motor drives: review of motor theory, power electronic control principles, vector and servo drives (stepper, DC, induction, brushless PM and switch-reluctance). Modulation methods. Theory motor and drive selection and application. System design, implementation and control, and computer interfacing. Electromagnetic interference.

  • General Course Information
    Course Details
    Course Code ELEC ENG 3112
    Course Electric Drive Systems M
    Coordinating Unit School of Electrical & Electronic Engineering
    Term Semester 2
    Level Undergraduate
    Location/s North Terrace Campus
    Units 3
    Contact Up to 4 hours per week
    Available for Study Abroad and Exchange Y
    Prerequisites ELEC ENG 1101, ELEC ENG 2105
    Incompatible ELEC ENG 3104, ELEC ENG 4059
    Assessment Exam, Quizzes
    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.

  • 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 Stage 1 Competency Standard for the Professional Engineer.
    The course is designed to develop the following Elements of Competency: 1.1   1.2   1.3   1.4   1.5   1.6   2.1   2.2   3.3   3.5   

    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.


    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.


    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.

  • Learning Resources
    Required Resources
    A comprehensive set of course notes will be made available. 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 will be able to 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 website , 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 access all course materials , 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 building block in Power Electronics, the DC/DC converter. These assessments are designed to reinforce your learning and understanding ofthe course materials.

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

    The final examination will cover the entire course content.

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

    The University expects students to spend around 150 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.

    Learning Activities Summary
    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-CurrentRelationships 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 Devices6.1 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
  • 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)*
    Hurdle criteria Learning outcomes
    Quiz 1,2,3 30 Individual Summative See time table 1. 2. 3. 4. 5. 6.
    1 Major Assignment 20 Individual Summative See time table 1. 2. 3. 4. 5. 6.
    On-Line assessments 1,2,3,4 12 Individual Summative See time table 1. 2. 3. 4. 5. 6.
    Final Examination 38 Individual Summative See time table 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
    Assessment Detail
    Please refer to the time table, assessment components given above and possible instructions that will be given during the delivery of the course.
    Please refer to the instructions for each assessment components that will provided 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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