FEJ3311 Modulation of Power Electronic Converters 8.0 credits
Modulation of power converters plays a decisive role in modern power electronics where low losses as well as dynamical requirements, harmonics and electromagnetic interference (EMI) are of great importance. The course covers synthesis and analysis of modulation methods for Voltage Source Converters (VSC).
Information for research students about course offerings
Given in connection with EJ2311 every year P3
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Content and learning outcomes
Course contents
Circuit modelling, fundamental mathematics, harmonics in single-phase and three-phase systems, survey of modulation principles, relation between modulation and the development of power-semiconductors, carrier-based methods, SPWM and space vector modulation, influence of sampling, fixed pulse-patterns, harmonic elimination, tolerance band modulation, harmonics in power systems and electric railway traction, norms and standards, influence of harmonics on electrical machines, survey of harmonic filters.
Intended learning outcomes
After the examination the student should be able to
·Define fundamental concepts in pulse-width modulation
·Describe differences between different principles of modulation regarding properties such as harmonics and dynamic conditions
·Know different carrier based modulation methods and their synthesis.
·Use different methods for analysis of carrier based modulation methods
·Calculate pulse-patterns for harmonic elimination
·Estimate stray losses in electrical machines due to harmonics.
Course disposition
Lectures 16 hours, computer exercises 8 hours, Laboratory work 4 hours,55 hours individualized project
Literature and preparations
Specific prerequisites
Recommended prerequisites
EJ2200 Electrical machines and drives and EJ2300 Power Electronics.
Equipment
Literature
D. G. Holmes, T. Lipo., “Pulse Width Modulation for Power Converters”.Wiley Interscience.
Examination and completion
If the course is discontinued, students may request to be examined during the following two academic years.
Grading scale
Examination
- EXA1 - Examination, 8.0 credits, grading scale: P, F
Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.
The examiner may apply another examination format when re-examining individual students.
The individualized project should preferably be linked to the student’s own research.
Other requirements for final grade
Projects and laboratory reports
Written examination
Opportunity to complete the requirements via supplementary examination
Opportunity to raise an approved grade via renewed examination
Examiner
Ethical approach
- All members of a group are responsible for the group's work.
- In any assessment, every student shall honestly disclose any help received and sources used.
- In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.
Further information
Course web
Further information about the course can be found on the Course web at the link below. Information on the Course web will later be moved to this site.
Course web FEJ3311