EJ2221 Design of Permanent Magnet Synchronous Machines 7.5 credits
Konstruktion av permanentmagnetiserade synkronmaskiner
The aim of the course is to understand how to make an electromagnetic and thermal design of permanent magnet synchronous machines from any given set of specifications. The knowledge is applied by designing a machine for an industrial application.
Education cycleSecond cycle
Main field of studyElectrical Engineering
Grading scaleA, B, C, D, E, FX, F
Information for research students about course offerings
PhD students are recommended to apply to FEJ3221, given every year in parallel with EJ2221. Take contact with course responsible.
Intended learning outcomes
After the course, the student should be able to:
- list different existing topologies of permanent magnet machines
- describe and compare distributed and concentrated windings
- explain the principle of field-weakening for permanent magnet synchronous motors
- choose the appropriate permanent magnet materials for a given construction with regard to functionality, operating conditions, economical and environmental factors
- explain and compare the properties of iron laminations and soft magnetic composites in relation to their use in electrical machines
- enumerate different loss components in a machine and relate them to different existing models
- develop a simple analytical model of the thermal behaviour of a machine taking into account the relevant losses for the application
- explain all the tasks in the design procedure and apply them to a surface mounted permanent magnet motor with distributed windings with simplified analytical models
- explain discrepancies between results from different analytical methods through knowledge about the various approximations they are based on
- describe the concepts of finite element software tools and apply them in the analysis of permanent magnet synchronous machines
- report and present the results of the design project that has been conducted for a chosen application
- do a critical evaluation of the report and presentation of the specific studies conducted by the other students
Course main content
Synchronous electrical machines, permanent magnets, iron lamination, soft magnetic composite, models for losses, thermal modelling, field-weakening, windings, design procedure, finite-element method simulations.
- Lectures 12 hours
- Tutorials 28 hours
- Project 36 hours
The main activity in the course is the project.
Completed Bachelor's degree (180 higher education credits), or equivalent academic qualifications. Documented proficiency in English corresponding to English B/English 6.
basic course in electrical machines and drives EJ2200 or equivalent course at master level (1st year)
Kurs pärm Design of Permanent Magnet Synchronous Machines, KTH, 2008.
Kurslitteraturen består huvudsaklingen av aktuella forskningsartiklar som utdelas vid kursstart.
Dessutom tillkommer relevant kurslitteratur beroende på vald projektuppgift. Föregående läsårs lista av referenser finns tillgänglig på kursens hemsida.
- PRO1 - Project Report, 3.0, grading scale: P, F
- PRO2 - Assignments, 1.5, grading scale: P, F
- TEN1 - Examination, 3.0, grading scale: A, B, C, D, E, FX, F
Oral examination (TEN1; 3 credits), project reports (PRO1; 3 credits), oral presentations with opposition (PRO2; 1.5 credits)
Requirements for final grade
All the different moments have to be passed before the course credits are registered.
EECS/Electrical Energy Engineering
Juliette Soulard <firstname.lastname@example.org>
Course language: English
Limited number of participants. Priority given to students with passed pre-requesites course with highest grade.
This course is intended for students doing their second year of a master program.
EJ210X Master's Project in Electrical Machines and Drives
Course syllabus valid from: Autumn 2010.
Examination information valid from: Spring 2019.