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Danish title: Effektelektronik
Language of instruction: English
Point( ECTS ): 5
Course type: BEng
Mandatory course (B Eng), Electrical Energy Technology
Mandatory course (B Eng), Electrical Engineering
Schedule: Autumn E1A (Mon 8-12)
Location: Campus Ballerup
Scope and form: Lectures, exercises, lab ecercises, campany visits and group work/simulations
Duration of Course: 13 weeks
Date of examination: E1A
Type of assessment: Written examination and reports
Exam duration: Written exam: 4 hours
Aid: All Aid - no access to the internet
Evaluation: 7 step scale , internal examiner
Previous Course: 62816
Academic prerequisites: 62760 or 34601 / 34722 / 62752 , to be followed in parallel
Responsible: Ashraf Fathi Khalil Sulayman , Ballerup Campus, Building Ballerup , ashka@dtu.dk
Department: 62 Department of Engineering Technology and Didactics
General course objectives
This course provides students with basic knowledge of power electronic devices and converters and their operating principles. These concepts are applied for the analysis and design of power converters.
Learning objectives
A student who has met the objectives of the course will be able to:
Explain the operation of power semiconductor devices such as Diodes, Power BJTs, Power MOSFETs, IGBTs, Thyristors and Static Induction Devices.
Demonstrate understanding of the functionality of power electronic converters.
Analyse the electrical characteristics of power semiconductor devices for a range of applications
Analyse the electrical characteristics of power electronics converters.
Develop skills to build and test power electronic converters
Simulate power electronic converters using Matlab/Simulink and PSCAD
Design a power electronic converter for a given application.
Asses the design of power converters using computer simulation (PSCAD and Matlab/Simulink)
Content
Introduction to Power Electronics: General applications, types of power semiconductor devices, Types of power electronics converters.
Power Semiconductor Devices: Diodes, Silicon controlled rectifier, Power BJTs, Power MOSFETs, IGBTs, Thyristors DIAC, TRIAC and Static Induction Devices, their static and dynamic characteristics, power electronics modules.
DC-DC Converters: Buck converter, Boost converter and Buck-Boost converter, bidirectional DC/DC converters, isolated DC/DC converters, their steady and transient characteristics, small-signal model and their Control, and their applications.
Single and three-phase Rectifiers, Single-phase and three-phase uncontrolled and controlled rectifiers, their steady and transient characteristics, small-signal model and their Control, and their applications.
Single-Phase and three-phase DC-AC Inverters: Single-phase and three-phase bridge inverters, Modulation techniques, Voltage source inverters and current source inverters, Voltage and frequency control, their steady and transient characteristics, small-signal model and their control, and their applications.
AC-AC Converters their steady and transient characteristics, small-signal model and their Control, and their applications.
Course literature
Muhammad H. Rashid, Power Electronics Devices, Circuits, and Applications, Fourth Edition, Pearson, 2014.
Remarks
Section of Energy Technology and Computer Science
Elektrisk Energiteknologi: 3. semester
Elektroteknologi: 5. semester
The design will be carried out through Texas Instruments™ C2000™ Microcontroller that can be programmed with Matlab/Simulink. The simulation and the analysis will be carried out using PSCAD.
Introduction:
•Power electronics is based primarily on the switching of the power semiconductor devices.
•The power-handling capabilities and the switching speed of the power devices have improved tremendously.
•Microprocessors and microcomputer technology has a great impact on the control and synthesizing the control strategy for the power semiconductor devices
Microelectronics that have the power and intelligence of a brain
Power semiconductors that can be regarded as the muscle
Lecture 1
This lecture develops students’ understanding of power semiconductor devices and power electronic converters, covering devices such as diodes, BJTs, MOSFETs, IGBTs, thyristors, and static induction devices. Students learn to analyse the electrical characteristics and operation of semiconductor devices and converters, as well as develop practical skills in designing, building, testing, and evaluating power electronic circuits. The course also emphasizes MATLAB/Simulink simulation, enabling students to model and assess converter performance, design appropriate gate-drive and optocoupler circuits, select heat sinks, and develop complete power converter solutions for specific applications. download
Lecture 2: Diodes and their circuits
This topic covers the operating principles, characteristics, and applications of power diodes, including diode types, circuit models, series and parallel operation, and reverse-recovery behavior. Students also develop analytical skills for calculating reverse-recovery current, capacitor voltages, inductor currents, stored energy, and transient di/dt and dv/dt in RC, RL, LC, and RLC circuits. download
Lecture 3: Diode Rectifier
This topic focuses on diode rectifiers, covering their different types, operating principles, and electrical characteristics. Students learn to calculate key performance parameters, analyze and design diode rectifier circuits, and evaluate their performance using computer simulation. download
Lecture 4: Power Transistors
The section focuses on power transistor operation, control, protection, and modelling. Students will learn to:
Describe switching characteristics and limitations of MOSFETs, COOLMOS, BJTs, IGBTs, and SITs.
Explain gate-control requirements and switching models.
Design di/dt and dv/dt protection circuits.
Determine suitable arrangements for transistors connected in series and parallel.
Develop and use MATLAB models of MOSFETs, BJTs, and IGBTs.
Analyse gate-drive characteristics and requirements.
Explain isolation techniques between high-power circuits and low-level gate-drive circuits.
Lecture 5: DC-DC Converters
Summary of the DC–DC Converter Learning Objectives
Ideal transistor switch — Identify the key characteristics that define an ideal switching device used in power electronics.
Switching technique — Understand how switching is used to convert DC voltage levels efficiently.
Types of DC–DC converters — Recognize the main converter categories (buck, boost, buck‑boost, etc.).
Principle of operation — Learn how DC–DC converters regulate and transform voltage using switching and energy storage elements.
Performance parameters — Identify metrics such as efficiency, ripple, voltage regulation, and dynamic response.
Converter design — Analyze how component selection and topology affect converter performance.
Simulation in MATLAB — Use MATLAB tools to model and simulate converter behavior.
Load inductance effects — Understand how inductance influences current continuity and converter operating modes.
Lecture 6: DC-AC Inverters
Summary of the Inverter Learning Objectives
Switching techniques — Understand how DC is converted to AC using controlled semiconductor switching and identify the main inverter categories (voltage‑source, current‑source, single‑phase, three‑phase).
Operating principle — Learn how inverters synthesize AC waveforms from a DC supply through timed switching sequences and energy‑shaping circuits.
Performance parameters — Determine key metrics such as efficiency, harmonic distortion, voltage regulation, switching losses, and dynamic response.
Modulation techniques — Identify PWM‑based methods (SPWM, SVPWM, stepped modulation) used to approximate sinusoidal outputs and techniques for harmonic elimination.
Inverter design — Analyze how topology, switching devices, filters, and control strategies influence inverter performance.
MATLAB evaluation — Use MATLAB/Simulink to model inverter behavior and evaluate waveform quality, losses, and dynamic response.
Load impedance effects — Assess how resistive, inductive, or capacitive loads alter current shape, phase angle, and harmonic content. download
Lecture 7: Thyristors and Thyristorized Converters
Types of thyristors — Identify the main thyristor families used in power electronics.
Turn‑on and turn‑off behavior — Understand how thyristors switch conduction on and off and the conditions required for each.
Two‑transistor model — Learn how a thyristor can be represented as two coupled transistors to explain its internal operation.
Switching limitations — Explain the constraints of thyristors, including controllability, switching speed, and commutation requirements.
Gate characteristics — Describe how gate current, voltage, and control requirements vary across different thyristor types and models.
MATLAB models — Apply and simulate thyristor behavior using MATLAB tools.
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