Electromechanical Systems

Course Description

System structure. Components of electromechanical systems. Operating principles of DC and AC motors. DC motors (series, shunt and compound, permanent magnet). AC motors (synchronous, asynchronous, reluctance, hysteresis, step, electronic commutated). Static and dynamic models of electric machines. Power semiconductor valves and switches. Overview of basic semicinductor valves properties. Electronic power converters for DC and AC motor control; adjustable speed and servo drives. Control and power characteristics of converters. Interaction between power supply, converter and motor. Current and voltage mode control of power converters. Examples of electromechanical systems.

General Competencies

Good understanding of electromechanical systems and components structure, characteristics and application. Ability to model, simulate and analyze basic types of motors and power converters, as well as their interaction.

Learning Outcomes

  1. explain operation principles of DC and AC motors
  2. explain operation principles of basic power electronic converters
  3. explain basic mechanical laws for electric drives
  4. analyze dependance of converter control variables on converter behavior
  5. analyze dependance of motor control variables motor behavior
  6. assemble power converter, electric motor and mechanical load into operating system
  7. create simulation model of power converter, electric motor and drive
  8. define and understand fundamental industrial applications of electric drives

Forms of Teaching


Lectures are organized through 2 teaching cycles. The first cycle consists of 7 weeks of classes and mid-term exam, a second cycle of 6 weeks of classes and final exam. Classes are conducted through a total of 15 weeks with a weekly load of 3 hours.


Examination consists of mid-term exam and final exam in which numerical problems are solved, and the writing of reports on laboratory exercises.


On the oral exercises the process of solving complex medium and complex problems is shown to students.

Laboratory Work

Laboratory exercises are organized in 3 cycles of thematically linked to the 3 main areas of the lectures (electrical machinery, electronic power converters, motor drives).

Grading Method

Continuous Assessment Exam
Type Threshold Percent of Grade Threshold Percent of Grade
Laboratory Exercises 33.3 % 30 % 33.3 % 30 %
Mid Term Exam: Written 0 % 20 % 0 %
Final Exam: Written 30 % 40 %
Final Exam: Oral 10 %
Exam: Written 40 % 50 %
Exam: Oral 20 %

Week by Week Schedule

  1. Structure of electromechanical systems. Components of electromechanical systems.
  2. Principles of electromagnetism and electromechanical energy conversion.
  3. Fundamental mechanical components.
  4. DC motors (series, shunt and compound, permanent magnet). Operating principles, characteristics, structure, models.
  5. AC motors (synchronous, asynchronous). Operating principles, characteristics, structure, models.
  6. AC motors (reluctance, hysteresis, step, electronic commutated). Operating principles, characteristics, structure, models.
  7. Basic power semiconductor valves and switches. Overview of basic semiconductor valves properties.
  8. Mid-term exam
  9. Power converters for adjustable speed and servo DC drives.
  10. Power converters for AC drives.
  11. Power converters for reluctance, hysteresis, step and electronic commutated motors.
  12. Energy and control characteristics of converters. Interaction of sources, converters and drives.
  13. Electromechanical system example, traction drive.
  14. Electromechanical system example, automotive drive.
  15. Final exam

Study Programmes

University undergraduate
Control Engineering and Automation (module)
(5. semester)


M.E. El-Hawary (2002.), Principles of Electric Machines with Power Electronic Applications, Wiley-Interscience
N. Mohan, T. Undeland, W. Robins (2004.), Power Electronics: Converters, Applications and Design, Wiley
J.H. Harter (1995.), Electromechanics, Prentice Hall
D. W. Hart (1997.), Introduction to Power Electronics, Prentice Hall


Laboratory exercises


ID 86461
  Winter semester
L2 English Level
L1 e-Learning

Grading System

87,5 Excellent
75 Very Good
62,5 Good
50 Acceptable