Practical Course Power Electronics DC/DC Converter

Module Number: EI80006

Duration: 1 Semester

Recurrence: Summer Semester

Language: English

Number of ECTS: 6

Staff

Professor in charge: Ralph Kennel

Amount of work

Contact hours: 60

Self-study hours: 120

Total: 180

Description of Achievement and Assessment Methods

The module examination is adapted to the aspired learning results:

1. Based on graded preparatory tasks (homework), the students' ability to work independently into the subject matter and thus to acquire new knowledge, solve problems and develop models will be evaluated

2. The review of activity-based competences (for example, implementation of models on the computer) is carried out by means of comprehension questions and discussion during the execution of the experiment (conversation).

3. The ability to analyze and evaluate simulation results as well as logical thinking is checked by means of a graded final exam.

The final grade is calculated from the partial tests by applying the following coefficients:

- Experiment preparation:20%

- Experiment execution: 30%

- Final exam: 50%

Prerequisites (recommended)

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

• Profound knowledge of power electronics, e.g. lecture Power Electronics (EI8031 or EI7390)

• Experience in working in an electronic laboratory

• Basic knowledge of behavior of semiconductor power switches

• Fundamentals of control theory

Learning outcomes

After successful participation in the module, the student is able to:

• Work independently and safely in a power electronics laboratory

• Understand the behavior and operating mechanism of switched-mode power converters

• Understand the concept of systematic hardware debugging

• Understand the concept of electromagnetic compatibility analysis of DC/DC converters

• Apply the concept of efficiency analysis of DC/DC converters

• Evaluate different DC/DC converter topologies regarding efficiency, cost, electromagnetic compatibility

• Create a magnetic coil for a simple DC/DC converter

Contents

This module consists of a series of hands-on laboratory experiments with the following content being covered:

• Understanding the working principle of a buck-converter by measuring and testing a working prototype (12V-to-5V converter)

• Designing and building a magnetic coil for a boost converter and including this coil in an existing setup

• Analyzing an industrial DC/DC converter and its design criteria

• Experimental evaluation of a state-of-the-art load resonant converter (LLC)

• Experimental comparison of the different topologies regarding efficiency, electromagnetic compatibility, thermal behavior, and topology-dependent advantages

Teaching and learning methods

The teaching concept used in the module is based on three characteristics:

1. The detailed instruction manual is used to provide the necessary theoretical knowledge to carry out the experiments. In this case, preparatory tasks must be solved by the students before each experiment. These are evaluated and students are given feedback on their learning results at the beginning of the respective experiment.

2. The knowledge gained during the preparatory phase is transferred into groups during the experimental phase by means of practical tasks. During the experiments through inquiries and discussions with the supervisor the opportunity the possibility is given to deepen the knowledge of what has been learned.

3. Writing a final exams after carrying out the practical tasks enables the student to revise the treated material and to display the gained knowledge by answering questions regarding models and the simulation results. This phase serves both to consolidate the acquired knowledge and to promote analytical skills

Media

Following forms of Media will be employed in this module:

• Presentations

• Script with preparatory exercises

• Laboratory experiments

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.