Electrical Drive Systems

Higher education teachers: Fišer Rastko
Collaborators: Drobnič Klemen
Credits: 5
Semester: summer
Subject code: 64647

Subject description


  • Formal condition: enrolment in the study year.
  • Lectures, laboratory excercises with previous study. Due to high voltage and currents the laboratory work must be carried out in small groups of students.
  • Students must succesfully finish all of their laboratory duties before they can apply for an exam.

Content (Syllabus outline):

  • Basic components of electrical drives. Overview of the electrical drives field, brief history, present state and future trends.
  • Static and dynamic operation, characteristics of motors and loads, dynamic torque. Electrical and mechanical transient states, condition for static stability of drive systems. Design of electrical motors, commissioning, housing types, cooling, connections to the supply.
  • Electrical motors: induction motor (slip ring and squirrel cage), synchronous motor (with excitation winding or permanent magnet), reluctance motor, dc brush motor, dc brushless motor. Static and transient characteristics, problems during start-up and braking, speed control. Semiconductor converters for dc and ac drives and their control.
  • Methods for correct selection of electrical motors, dimensioning, thermal characteristics, duty cycles. Principles of energy efficient electrical motors nad drives, operation with high efficiency and power factor.
  • Special electrical drive systems: traction systems (drives in rail and automotive applications), electrical shafts, crane drives, linear motor drives, ultra speed drives.
  • Protection of electrical drives – disturbances from the load and supply, classical protection techniques, modern approach – on-line condition monitoring and supervision with applied detection and diagnostic techniques.

Objectives and competences:

To acquire knowledge and procedures to succesfully design, operate and maintain electrical drives in industrial systems.

Intended learning outcomes:

Students will get knowledge on simple and integrated electrical drive systems, their components and their principle of operation. They will study the connection between electical machines and mechanical loads, learn to control and change operating characteristics of electrical motors in order to fulfill the optimal performance of the drive systems.

Learning and teaching methods:

  • Lectures,
  • laboratory work with prior demonstration and computational excercises.

Study materials


  1. R. Fišer, Interno študijsko gradivo v pisni in elektronski obliki.
  2. D. Shroder, Elektrische Antriebe - Grundlagen mit Ubungs und Prufungsaufgaben, Springer, 2014.
  3. A. Hughes, B. Drury, Electric Motors and Drives - Fundamentals, Types and Applications, Elsevier, 2013.
  4. N. Mohan, Electric machines and Drives - A First Course, Wiley, 2012.
  5. M. Barnes, Practical Variable Speed Drives and Power Electronics, Newnes, 2003.
  6. B. Drury, The Control Techniques Drives and Controls Handbook, IET, 2009.
  7. N. Srb, Elektromotori i elektromotorni pogoni, Graphis, Zagreb, 2007.
  8. R. Mansius, Praxishandbuch Antriebsauslegung - Grunlagen, Formelsammlung, Beispiele, Vogel Fachbuch, 2012.

Study in which the course is carried out

  • 2 year - 1st cycle - Applied Electrical Engineering - Power Engineering Technology and System Automation