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Electrical Drives

Higher education institution:
Faculty of Mechanical Engineering and Naval Architecture
ECTS credits:
15(E) + 30(L)
Issuing teachers:

Professor Joško Deur, PhD

Assistant Professor Mario Hrgetić, PhD

Course contractors:

Assistant Professor Branimir Škugor, PhD (E)

Assistant Professor Mario Hrgetić, PhD (L)

Professor Joško Deur, PhD (L)

Course description:
Course objectives: The goal of the subject is to present basic knowledge of directcurrent (DC) and alternatingcurrent (AC) electrical machines and controlled electrical drives Enrolment requirements and required entry competences for the course: "Electrical engineering" or "Electrical engineering and electrical machines" Student responsibilities: Teaching activities consist of lectures and auditory and laboratory exercises, wherein student attendance is regularly checked. A minimum attendance rate of 70% is strictly enforced. Inappropriate behavior is not tolerated during examinations. Grading and evaluation of student work over the course of instruction and at a final exam: During the semester, two semester exams (colloquia) are organized in the 8th and 15th week of lectures. Successfully completed colloquia are equivalent to a onetime successful written exam. Maximum proportions of individual exam components: Written exam 50% (alternatively 1st and 2nd colloquia equal to 25% + 25%) Oral exam 50% Grading system: 5 87% or more, 4 76% to 87%, 3 65% to 76%, 2 50% 65%, 1 below 49% Methods of monitoring quality that ensure acquisition of exit competences: At the beginning of each lecture or exercise, a brief recapitulation of previously presented subject matter is performed (up to 5 minutes). During the lectures/excercise interactive teaching process is established. Afterwards, students are pointed towards further broadening the subject matter via appropriate literature. The subject matter for the next lecture/exercise is announced and additional teaching materials are offered. Consultations, either in person or via email correspondence, are also encouraged. During the semester, students are given the opportunity to actively participate in practical laboratory exercises which further illustrate the subject matter presented at lectures and auditory exercises. Results of semester exams (colloquia) are used as indirect quality indicators of the teaching process. Upon successful completion of the course, students will be able to (learning outcomes): analyze the behavior of electrical drives based on DC and AC induction machines under different operating conditions recommend power electronics hardware and sensors for electrical drive applications interpret the phenomena in electrical drives based on known static any dynamic characteristics of the electrical machine and working mechanism select an electrical machine and appropriate power electronics hardware based on the load cycle characteristics design the electrical drive control system validate the performance of controlled electrical drive Lectures 1. Directcurrent (DC) motors 2. Synchronous generators, threephase networks 3. Induction motors; construction and principles of operation 4. Induction motors; starting, reversing, and speed adjustment 5. Basic characteristics of electrical drives 6. Electrical braking 7. Dynamic behaviour of electrical drives 8. Selection of electrical drives 9. DC motors, speed adjustment 10. Structure of controlled electrical drive 11. Tuning of speed control loop 12. Positioning and tracking 13. Compensation of torsion, friction, and backlash effects in transmission mechanisms 14. Step motors and other special lowpower motors 15. Applications of electrical drives Exercises 1. DC motors (EXERC) 2. Threephase networks (EXERC) 3. DC motors (LAB) 4. Induction motors (EXERC) 5. Induction motors (LAB) 6. Knowledge verification I 7. Electrical braking and dynamic behaviour of electrical drives (EXERC) 8. Selection of electrical drives (EXERC) 9. DC motors, speed adjustment (LAB) 10. Demonstration of controlled electrical drive (LAB) 11. Tuning of speed control loop (EXERC) 12. Positioning and tracking (EXERC) 13. Speed control and positioning (LAB) 14. Friction compensation in positioning systems (LAB) 15. Knowledge verification II
Course languages:


Mandatory literature:

1. Skalicki, B., Grilec J.: "Električni strojevi i pogoni, Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, 2005.

2. Leonhard, W.: "Control of Electrical Drives", Springer-Verlag, Berlin, 1985.

Recommended literature:

3. Gugić, P.: "Električni servomotori", Školska knjiga, Zagreb, 1987.

Course in study programme:
Code Name of study Level of study Semester Required/Elective
36 Production Engineering graduate 3 required


  • E - Exercises
  • L - Lectures