Electromechanical Energy Conversion

Course Description

The structure of the system and the basic laws of electromechanical energy conversion. The general theory of electrical machines. The principle of operation, main parts, types and external characteristics of DC machines. The basic theory of AC electrical machines. Rotating magnetic field, windings, induced voltage. The principle of operation, structure, equivalent circuit, no-load condition, locked rotor condition, torque characteristics of an induction machine.

Learning Outcomes

  1. Describe the operating principle of rotating electrical machines
  2. Derive basic mathematical equation according to general theory of electrical machines
  3. Apply the general model of electrical machine for various types of machines
  4. Analyze steady state operating conditions of various types of electrical machines
  5. Relate classical theory of electromagnetic fields to operating principle of electrical machines

Forms of Teaching


Lectures take place in two cycles: the first 7 weeks at 3 hours and another 6 weeks, 3 hours per week.


solving numerical examples related to the content of the lectures


Laboratory exercises consist of three exercises, each lasting for 5 hours.

Grading Method

Continuous Assessment Exam
Type Threshold Percent of Grade Threshold Percent of Grade
Laboratory Exercises 50 % 15 % 50 % 15 %
Mid Term Exam: Written 40 % 30 % 0 %
Final Exam: Written 40 % 30 %
Final Exam: Oral 25 %
Exam: Written 50 % 50 %
Exam: Oral 35 %

Week by Week Schedule

  1. Magnetic circuits and magnetic materials
  2. Fundamentals of electromechanical energy conversion
  3. Fundamentals of electrical machines
  4. DC machine operating principle
  5. Steady-state model od DC machine
  6. DC machine speed control
  7. DC machine in electric drive
  8. Midterm exam
  9. Operating principles of AC machines. Rotating magnetic field.
  10. Induction motor construction and equivalent circuit.
  11. Analysis of induction motor equivalent circuit.
  12. No-load and short circuit test.
  13. Induction motor starting and speed control.
  14. Induction machine in a variable speed drive.
  15. Final exam

Study Programmes

University undergraduate
(5. semester)
[FER2-HR] Control Engineering and Automation - module
(5. semester)


R.Wolf (1995.), Osnove električnih strojeva, Školska knjiga, Zagreb
Stephen Umans, A Fitzgerald, Charles Kingsley (2013.), Electric Machinery, McGraw-Hill Higher Education
Stephen J. Chapman (2012.), Electric Machinery Fundamentals, McGraw-Hill Medical Publishing


Laboratory exercises

For students


ID 183419
  Winter semester
L0 English Level
L2 e-Learning
45 Lectures
0 Seminar
15 Exercises
15 Laboratory exercises
0 Project laboratory

Grading System

87.5 Excellent
75 Very Good
62.5 Good
50 Sufficient