Fundamental Theory and Design of DC/DC Power Supplies

Module Number: EI80007

Duration: 1 Semester

Recurrence: only in summer semester 2019 offered, guest professor

Language: English

Number of ECTS: 5

Staff

Professor in charge: Ralph Kennel

Lecture is offered by visiting professor Prof. Dr. Fuxin Liu

Amount of work

Contact hours: 90

Self-study hours: 60

Total: 150

Description of Achievement and Assessment Methods

During final exam the student is asked to display the gained knowledge by answering questions regarding fundamental theories and parameters design procedures, which contribute to consolidation the acquired knowledge and promotion of analytical skills. The final grade is calculated from the written exam at the end of the module, 120 min.

Prerequisites (recommended)

In order to participate successfully in the module, knowledge in the following areas is required

• Basic knowledge of electrical circuits and power electronics

• Basic knowledge of behavior of semiconductor power switches

• Fundamentals of magnetic components

• Fundamentals of control theory

Learning outcomes

After successful participation in the module, the student is able to: • Understand the behavior and operating mechanism of switched-mode power converters • Evaluate the electrical characteristics and the operation principles of DC/DC converters in their respective applications • Know the concept and classifications of soft-switching and parameters design to achieve soft-switching for popular DC/DC power supplies • Design the magnetic core and windings of magnetic components including transformers and inductors • Apply the concept of efficiency analysis of DC/DC converters • Build, analyze and evaluate simulation models with open-loop and closed-loop architectures

Contents

This module consists of a series of basic theories and design procedures for DC/DC power supplies with the following content being covered:

• Topology derivation and operation principle of basic non-isolated DC/DC converters, including buck, boost, buck-boost, Cuk, SEPIC and zeta converters

• Topology derivation and operation principle of basic isolated DC/DC converters, including forward, flyback, push-pull, half-bridge, and full-bridge converters

• Concept of soft-switching and hard-switching, the implementation methods of realizing soft-switching for the full-bridge converter

• Parameter design of key components in DC/DC power supplies, including power semiconductors, inductors, filter capacitors and transformers, etc.

• Simulation models of representative power supplies including the buck converter, the flyback converter, and the full-bridge converter.

Teaching and learning methods

This module consists of a series of basic theories and design procedures for DC/DC power supplies with the following content being covered:

• Topology derivation and operation principle of basic non-isolated DC/DC converters, including buck, boost, buck-boost, Cuk, SEPIC and zeta converters

• Topology derivation and operation principle of basic isolated DC/DC converters, including forward, flyback, push-pull, half-bridge, and full-bridge converters

• Concept of soft-switching and hard-switching, the implementation methods of realizing soft-switching for the full-bridge converter

• Parameter design of key components in DC/DC power supplies, including power semiconductors, inductors, filter capacitors and transformers, etc.

• Simulation models of representative power supplies including the buck converter, the flyback converter, and the full-bridge converter.

Media

Following forms of Media will be employed in this module:

•  Presentation

•  Black-/whiteboard

•  Overhead projector

•  Manuscript

•  Simulation examples

•  Tutorials

Reading List

  • Erickson, R.; Maksimović, D. (2001). Fundamentals of power electronics. Norwell, Mass: Kluwer Academic. • Mohan, N.; Undeland, T. ;
  • Robbins, W. (2003). Power electronics : converters, applications, and design. Hoboken, NJ: John Wiley & Sons.