Single-Course English 10 ECTS

Power Electronics 1

Overall Course Objectives

It is the goal of this course to enable the students to understand and analyze the function of known as well as unknown converter topologies. Further to enable the students to identify both advantages and disadvantages of different power electronic components and converter topologies in order to be able to make a basic design of a converter for a given application.

Learning Objectives

  • understand and analyze both known and unknown converter topologies
  • identify the fundamental control methods (current mode/voltage mode) used in switch mode converters
  • evaluate advantages and disadvantages of different converter topologies with respect to a given application
  • design ferrite transformers for switch mode converters
  • design inductors for switch mode converters
  • design input filters for switch mode converters
  • design output filteres for switch mode converters
  • perform simple calculations/simulations on the feedback circuit in switch mode converters
  • evaluate suitability and applicability of different power electronic components, active as well as passive
  • perform a basic design of a converter for a given application

Course Content

Section 1: Course Introduction
Section 2: Non-isolation DC-DC Converters
Basic concepts and definitions; Analysis of basic power circuits: Buck, Boost, and Buck-Boost; Calculation of components stress factors.
Section 3: Isolation DC-DC Converters
Choice and analysis of Isolated converter topologies: Flyback, Forward, Push-Pull, Half-Bridge, Full-Bridge, SEPIC, Cuk; Steady state transfer functions; Voltages and currents waveforms in the circuit; Continuous and discontinuous conduction mode; Selection of power-semiconductors and passive components; Snubber circuits.
Section 4: Magnetic Components Design
Basic magnetic theory; Transformer and inductor models; Loss models; High frequency skin and proximity effects; Transformers & Inductors design examples.
Section 5: Input filter & Output filter Design
Output filter design considerations: voltage ripple, load step, ESR. Input filter design criterias: high frequency attenuation, Middlebrook’s impedance inequlities theory
Section 6: Controller Design
Feedback loop stability; Choice and design of control and protection circuits (Error-amplifiers, Auxiliary supply, undervoltage – and overvoltage protection, current limit etc.). Driver circuits. PWM-, voltage- and current-mode control.

Recommended prerequisites


Teaching Method

Overview class lectures and project work/assignments



This course has a natural comtinuation in 34653 Power Electronics 2, lab. course. (original course no. 31353)
E-learning is used in the form of on-line voting systems, on-line quiz (home assignments), chat room, discussion board or blog and web-based tools.

See course in the course database.





13 weeks




DTU Lyngby Campus

Course code 34652
Course type Candidate
Semester start Week 35
Semester end Week 48
Days Wed 8-17

15.000,00 DKK