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Syllabus for

Academic year
ENM055 - Electric drives 1
Syllabus adopted 2012-02-21 by Head of Programme (or corresponding)
Owner: MPEPO
7,5 Credits
Grading: TH - Five, Four, Three, Not passed
Education cycle: Second-cycle
Major subject: Electrical Engineering

Teaching language: English
Open for exchange students
Block schedule: D

Course module   Credit distribution   Examination dates
Sp1 Sp2 Sp3 Sp4 Summer course No Sp
0107 Examination 7,5 c Grading: TH   7,5 c   25 Oct 2012 pm H,  17 Jan 2013 pm V,  26 Aug 2013 pm V

In programs

TIELL ELECTRICAL ENGINEERING - Electrical Engineering, Year 3 (compulsory elective)


Docent  Sonja Lundmark


EEK205   High performance electric drives EEK610   Electric drives-1

Course evaluation:


For single subject courses within Chalmers programmes the same eligibility requirements apply, as to the programme(s) that the course is part of.

Course specific prerequisites



The overall aim of the course is to provide an understanding of the design of electric drive systems in general and an ability to choose the relevant drive system for a given application. The course will provide a deep understanding of electric machines: theory, applications, steady-state, and (for the dc brush machine) dynamic performance with speed and current control including relevant theory. The student is encouraged to consider environmental aspects, such as energy-efficient drive systems, and recycling of copper.

Learning outcomes (after completion of the course the student should be able to)

  • describe the steps required for the design and implementation of an electric drive system. The student should also be able to exemplify some of the trade-offs that are available to the developer or to a drive system purchaser;

  • describe the assessments of the treated electric machines (mentioned below), the way of operation, the steady state models, and general performance such as torque-speed curves;

  • recognize the appearance of the different machine types and know what the main parts look like;

  • find the parameters in the models by performing relevant experiments and understand and follow safety instructions for the drive system lab used in the course;

  • describe the dynamic performance of the dc brush machine with the coupled electric and mechanic equations;

  • use the relevant models and perform simulations with Matlab/Simulink on direct start, current and speed control of the dc brush machine, connected to the supply via a thyristor converter (assumed ideal);

  • compare simulations and experimental findings and document and present the work in a written report;

  • calculate the different electrical and mechanical steady-state quantities for DC, Induction, synchronous and permanent magnet motors;

  • choose the relevant (environmental friendly) drive system for a given application with given specifications.


The course menu is as follows:

    1. Introduction to Electric Drives

    2. Review of Control Engineering

    3. Direct-current machines: theory, applications, steady-state and dynamic performance

    4. Alternating-current machines: theory, applications and steady-state performance

    5. Motor/Drive selection

The treated machine types are: dc brush-, synchronous-, induction, brushless dc-, and switched reluctance machines. Lectures and tutorials are given in conjunction with practical laboratory work and computer simulations.

There are two practical laborations and one computer lab. Before coming to the lab, home assignments must be done and the safety instructions must be read and understood. This will be tested before the laboration can start. Poor preparation will mean that you fail to attend. The laborations deal with:

    1. Dc-motor: The laboratory experiment aims at determining parameters of a DC motor.

    2. Dc motor control: In this assignment you shall perform a direct start and implement a digital PI-regulator to control the speed of the DC machine in a Labview program.

    3. Dc-motor control: Simulations in Simulink and MATLAB regarding start of the DC machine, current and speed regulation etc.

In the laboratory report, some of the results of the practical work and the simulations will be compared and/or discussed.


The course comprises of about 17 lectures (2 x 45 min), 11 tutorials (2 x 45 min), two practical laboratory exercises (2 x 4 h) and a (2 x 4 h) computer lab. There is also a (not obligatory) trial exam (4 x 45 min).


  • Electric Motors and Drives (2006), by A Hughes published by Newnes, Elsevier (available at Cremona and DC);

  • Hand-out material at lectures and tutorials;

  • Students are encouraged and expected to consult other books in the general area of Electric Drives.


Written examination (70%). Approved laboratory exercises including a laboratory report (30%). Trial exam (+10%). Grades: Fail, 3, 4 or 5. Students must achieve at least 50% in the laboratory mark to pass the course. Students must also achieve at least 40% in the written examination to pass the course.

Page manager Published: Thu 03 Nov 2022.