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Syllabus for

Academic year
ENM055 - Electric drives 1  
Syllabus adopted 2015-02-11 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
Maximum participants: 90

Course module   Credit distribution   Examination dates
Sp1 Sp2 Sp3 Sp4 Summer course No Sp
0107 Examination 7,5 c Grading: TH   7,5 c   27 Oct 2015 pm M,  04 Jan 2016 pm H   22 Aug 2016 pm SB

In programs

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


Professor  Yujing Liu


EEK205   High performance electric drives EEK610   Electric drives-1

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In order to be eligible for a second cycle course the applicant needs to fulfil the general and specific entry requirements of the programme that owns the course. (If the second cycle course is owned by a first cycle programme, second cycle entry requirements apply.)
Exemption from the eligibility requirement: Applicants enrolled in a programme at Chalmers where the course is included in the study programme are exempted from fulfilling these requirements.

Course specific prerequisites



The overall aim of the course is that the students should develop and demonstrate an understanding of the design of electric drive systems in general and an ability to choose the relevant drive system for a given application. After the course the students should have a deep understanding of electric machines: theory, applications, steady-state, and for the DC machine also dynamic performance with speed and current control, including relevant theory. The course also focuses on the energy efficiency of the drive system and to some extent its environmental impact.

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 needs to be considered by the developer or by the 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.
  • describe how the parameters in the machine models can be obtained from practical experiments and for the DC machine perform relevant measurements. The students should also understand and follow the safety instructions for the drive system lab used in the course.
  • describe the dynamic performance of the DC machine with the coupled electric and mechanic equations.
  • use the relevant models to perform simulations with Matlab/Simulink on a direct start, current and speed control of the DC machine.
  • 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 machines.
  • 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 (DC) machines: theory, applications, steady-state and dynamic performance
  4. Alternating-current (AC) machines: theory, applications and steady-state performance
  5. Machine/Drive selection

The treated machine types are: DC, 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 machine: The laboratory experiment aims at determining the parameters of a DC machine.
  2. DC machine 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 machine control: Simulations in Matlab/Simulink 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, by A Hughes published by Newnes, Elsevier
  • 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 (80%). Approved laboratory exercises including a laboratory report (20%). 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: Mon 28 Nov 2016.