EJ2200 Electrical Machines and Drives 7.5 credits

Elektriska maskiner och drivsystem

Offering and execution

Course offering missing for current semester as well as for previous and coming semesters

Course information

Content and learning outcomes

Course contents *

Asynchronous, Synchronous and DC machines. Salient poles, harmonics and space harmonics. Models for electrical machines under steady state and transient conditions. Vector representation of AC machines. Control of torque, speed and position for variable-speed AC and DC motor drives

Intended learning outcomes *

After the course the student should be able to:

  • Describe the fundamental parts of electrical drives including converter, electrical machine and load.
  • Explain the operating principles of induction machines, synchronous machines and dc machines
  • Identify parameters in models of electrical machines
  • Use equivalent circuits to analyze electrical machines in steady state
  • Construct phasor diagrams for different loads and to use the vector method for analysis of AC machines
  • Describe the design of a simple three-phase ac winding and explain the concepts of pole number and winding factor
  • Explain the background to voltage harmonics and estimate their influence on e.g. losses in electrical machines
  • Explain the presence of airgap space harmonics in electrical machines and describe their influence on the behaviour of the machine
  • Use dynamic simulation software to analyze vector control of induction motors.

Course Disposition

No information inserted

Literature and preparations

Specific prerequisites *

180 higher education credits, or equivalent academic qualifications. Documented proficiency in English corresponding to English B.

Recommended prerequisites

Compulsory courses on the Electrical Engineering program or knowledge comparable to EJ1200 Electric Power Systems

Equipment

No information inserted

Literature

Electrical Machines and Drives KTH 2010

Examination and completion

Grading scale *

A, B, C, D, E, FX, F

Examination *

  • LAB1 - Laboratory Work, 3.0 credits, Grading scale: P, F
  • TENA - Examination, 4.5 credits, Grading scale: A, B, C, D, E, FX, 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.

Other requirements for final grade *

Written exam, two laboratory works one project assignement

Opportunity to complete the requirements via supplementary examination

No information inserted

Opportunity to raise an approved grade via renewed examination

No information inserted

Examiner

Juliette Soulard

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 EJ2200

Offered by

EES/Electrical energy conversion

Main field of study *

Electrical Engineering

Education cycle *

Second cycle

Add-on studies

EJ2210, EJ2221 and EJ2310

Contact

Mats Leksell

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.

Supplementary information

Replaces 2C1241