Electric Machines and Transformers

Последна измена: March 30, 2023
1. Course Title Electric Machines and Transformers
2. Code 4ФЕИТ02Л006
3. Study program ЕЕС,ЕЕПМ
4. Organizer of the study program (unit, institute, department) Faculty of Electrical Engineering and Information Technologies
5. Degree (first, second, third cycle) First cycle
6. Academic year/semester II/4 7. Number of ECTS credits 6
8. Lecturer D-r Krste Najdenkoski
9. Course Prerequisites
 Passed: Fundamentals of Electrical Engineering
10. Course Goals (acquired competencies): Acquired knowledge about the principles of operation and operation of electrical machines and transformers. Competence for selection of motors, generators and transformers, according to their place in the power system, and the ability to analyze their characteristics. Knowledge of the methods for testing electric motors, generators and transformers.
11. Course Syllabus: Introduction to electromechanical energy conversion. Materials for electrical machines and transformers. Power losses and efficiency. Heating and cooling. Loss of life.
Transformers. Types of transformers. Construction – magnetic and electrical system. Coefficient od transformation. Transformer mathematical model. No-load and short circuit regimes. Three-phase transformers. Winding schemes and vector groups. Three winding transformers. Autotransformers.
Basic electromagnetic phenomena in machines. Determination of induced voltage. Electromagnetic torque. Magnetic field in the machines.
DC power machines. Electric motor and generator mode. Characteristics of dc machines with different excitation mode Balance of power and energy diagram.
AC machines. Asynchronous and synchronous generators and motors. Constructive characteristics. Phasor diagrams and synchronous reactances. Parallel operation.
12. Learning methods: Lectures, laboratory exercises, project assignments, independent assignments, home learning.
13. Total number of course hours 3 + 1 + 1 + 0
14. Distribution of course hours 180
15. Forms of teaching 15.1. Lectures-theoretical teaching 45
15.2. Exercises (laboratory, practice classes), seminars, teamwork 30
16. Other course activities 16.1. Projects, seminar papers 0
16.2. Individual tasks 0
16.3. Homework and self-learning 105
17. Grading 17.1. Exams 10
17.2. Seminar work/project (presentation: written and oral) 0
17.3. Activity and participation 0
17.4. Final exam 90
18. Grading criteria (points) up to 50 points 5 (five) (F)
from 51to 60 points 6 (six) (E)
from 61to 70 points 7 (seven) (D)
from 71to 80 points 8 (eight) (C)
from 81to 90 points 9 (nine) (B)
from 91to 100 points 10 (ten) (A)
19. Conditions for acquiring teacher’s signature and for taking final exam Success of all pre-examination activities
20. Forms of assessment During the semester, two partial written exams are provided (at the middle and at the end of the semester, with duration 120 minutes), test from laboratory exercises For students who have passed the partial exams and the laboratory exercise test, the exam is considered passed. The other students take the final exam on whole material (duration 120 minutes). The points from the partial exams/final exam and the test are included in the final grade.
21. Language Macedonian and English
22. Method of monitoring of teaching quality Self-evaluation
23. Literature
23.1. Required Literature
No. Author Title Publisher Year
1 A. E. Fitzgerald, Ch. Kingsley Jr., S. Umans Electric Machinery McGraw-Hill; 6th edition 2005
2 B. S. Guru, H. R. Electric Machinery and Transformers Oxford University Press 2000
23.1. Required Literature
No. Author Title Publisher Year
23.2. Additional Literature
No. Author Title Publisher Year
1 James H. Harlow Power transformers CRC Press 2003