Electromechanical and Electrical Conversion

Course Description

The structure of a system of electromechanical energy conversion and the basic laws. Power transformers. Types and properties. No-load operation, short-circuit operation, loading, parallel operation. Special transformers. Synchronous machines. Drive characteristics, vector diagrams, power charts. Generators for small hydro power plants and wind power plants. Excitation systems. Induction machines. Properties and drive characteristics. Electrical drive system. Power converters, topologies, functions, characteristics.

General Competencies

The possibilities and means of application of various types of electrical machines, transformers and power electronic converters are introduced. The students will acquire knowledge on overall electromechanical and electrical energy conversion system in the process of production, transfer, distribution and consumption.

Learning Outcomes

  1. describe the principle of rotating machinery and the basic topology of the electronic converters učinskih
  2. list the basic types of electric machines and electronic power conversion
  3. explain the basic models of transformers, rotating machines and power semiconductor devices
  4. distinguish different control methods and modulation techniques of electronic power converters and synchronous generator excitation powering types
  5. use the vector-phasor diagram in the analysis of synchronous machine
  6. combine electronic power converter to the other system components for the electromechanical conversion, connect different tools (P-Q and vector-phasor diagrams) in synchronous generator operation principle clarification

Forms of Teaching


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




Exercises are held in the first cycle 3 times for 2 hours and in the second cycle, 2 times for 2 hours.

Laboratory Work

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


Possible after each lecture and exercises.

Acquisition of Skills

Laboratory exercises



Grading Method

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

Laboratory exercises are compulsory and a condition that can take the final exam and repeated examination

Week by Week Schedule

  1. Basic laws and structure of electromechanical transformation system
  2. Power transformers. Basic designs. Forms of winding connections.
  3. Power transformer characteristics. Parallel operation. Autotransformer.
  4. Equivalent scheme and parameters of the transformer. Standards.
  5. Synchronous machines. Generator. Basic characteristics.
  6. Network operation. Power chart of turbine-generator and hydro-generator
  7. Synchronous motor. Synchronous compensator. Synchronous machines excitation systems.
  8. Mid-term exam
  9. Induction machines, three phase and single phase motors.
  10. Asynchronous machines. Generators for small and wind power plants.
  11. Drives with induction, synchronous and DC machines.
  12. Examples of the application of power electronics. Electronic energy conversion. Basic topology and functions of electronic power converters.
  13. Models of power semiconductor components, transformers and passive components. Line commuted converters.
  14. DC-DC converters. Inverters.
  15. Final exam

Study Programmes

University undergraduate
[FER2-HR] Electrical Power Engineering - module
(5. semester)


Radenko Wolf (1995.), Osnove električnih strojeva, Školska knjiga, Zagreb
Stephan J. Chapman (2004.), Electric Machinery Fundamentals, McGraw-Hill International Edition
Zlatko Maljković (2002.), Inžinjerski priručnik IP3 - Električni strojevi, Školska knjiga, Zagreb
Luigi De Paoli i Alfredo Višković; Kigen (2007.), Ekonomija i politika proizvodnje električne energije, Kigen, Zagreb
Sergey E. Lyshevski (2000.), Electromechanical Systems, Electric Machines, and Applied Mechatronics, CRC Press
J. G. Kassakian, M. F. Schlecht, G. C. Verghese (2000.), Osnove učinske elektronike, Graphis, Zagreb


Laboratory exercises

For students


ID 127433
  Winter semester
L1 English Level
L1 e-Learning
45 Lectures
0 Seminar
20 Exercises
15 Laboratory exercises
0 Project laboratory

Grading System

85 Excellent
70 Very Good
60 Good
50 Sufficient