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Selected Chapters of Electrical Machines and Apparatuses

* Exchange students do not have to consider this information when selecting suitable courses for an exchange stay.

Course Unit Code410-2319/01
Number of ECTS Credits Allocated5 ECTS credits
Type of Course Unit *Compulsory
Level of Course Unit *First Cycle
Year of Study *Third Year
Semester when the Course Unit is deliveredWinter Semester
Mode of DeliveryFace-to-face
Language of InstructionCzech
Prerequisites and Co-Requisites Course succeeds to compulsory courses of previous semester
Name of Lecturer(s)Personal IDName
BER30Ing. Petr Bernat, Ph.D.
KAC37doc. Ing. Petr Kačor, Ph.D.
In this subject students acquaint with basic structuring of electrical machine and apparatus, philosophy and law of their function. Part of subject is practical - laboratory part, at which students will verify a theoretic piece of knowledge and test a primary objective characteristics of electrical machine and apparatus.
Learning Outcomes of the Course Unit
Student know basic characteristic of electrical machines and apparatus and applies this know-how with the view of theirs use, testing and diagnostics.
Course Contents
1. Types of electric machines. Materials used by electric machines design. Windings in electric machines.
2. Enclosure, shape and cooling. Laws, equations and methods used in electric machines.
3. Principle and description of transformers. Operation states. Equivalent circuit. Phasor diagrams.
4. Three-phase transformers. Winding connection. Operation in parallel. Special types of transformers. Magnetic field of electric machines. Types and function of winding.
5. Use of asynchronous machines. Design types and foundation dates. Function and operation state. Energy bilance of asynchronous machines. Equivalent circuit. Torque.
6. Circle diagram of asynchronous machine. Starting and speed control of asynchronous motors.
7. Asynchronous generator and brake.
8. Single phase induction motors.
9. Influence of harmonics on a asynchronous machines running.
10. Basic terminology of electrical device.
11. Transient effects in switching el.circuit on and off.
12. Solution recovery voltage.
13. Power effects.
14. Thermal effects and cooling.


1.Measurement of short-circuit current on transformer
2.Load characteristic of asynchronous motor
3.Line synchronization of synchronous generator
4.Measurement of temperature rise of low voltage circuit breaker
5.Measurement of let-through energy of circuit breaker in short-circuit connection
6.Pull characteristic of DC electromagnet
Recommended or Required Reading
Required Reading:
Hindmarsh,J.: Electrical Machines and their Applications, Oxford,1970
Mravec. R., Elektrické stroje a přístroje (I. - III.) SNTL (Alfa)1979, 1982
Bašta J. a kol.: Teorie el. strojů, SNTL/ALFA 1968

Recommended Reading:
Hindmarsh,J.: Electrical Machines and their Applications, Oxford,1970
Pyrhönen,J., Jokinen,T. Hrabovcová,V.: Design of rotating electrical machines, John Wiley & sons, Ltd. 2008
Keppert, S., Čermák, T.: Transformátory, skriptum VŠB Ostrava, 1984
Keppert, S.: Asynchronní stroje, skriptum VŠB Ostrava, 1984
Petrov,G.N.: El. stroje 1 a 2, ACADEMIA 1980
Bašta J. a kol.: Teorie el. strojů, SNTL/ALFA 1968
Hrabovcová,V., Rafajdus,P.: Elektrické stroje, teória a príklady, Žilinská univerzita, 2009

Planned learning activities and teaching methods
Lectures, Tutorials, Experimental work in labs, Project work, Other activities
Assesment methods and criteria
Task TitleTask TypeMaximum Number of Points
(Act. for Subtasks)
Minimum Number of Points for Task Passing
Credit and ExaminationCredit and Examination100 (100)51
        CreditCredit40 20
        ExaminationExamination60 11