Course detail

Elektrické pohonné jednotky

FEKT-BPC-EPJAcad. year: 2025/2026

The basic laws and equations used in the theory of electrical machines. Magnetic circuits of electrical machines. The basic voltage equations, equivalent circuit diagrams, phasor diagrams, the basic electrical connections of electrical machines. Energy and power flow diagrams, losses and efficiency. Torque equation. Electrical machines' performance. Nonsymmetrical loading. Influence of higher harmonics. Basic characteristics of electrical machines. 

Language of instruction

Czech

Number of ECTS credits

6

Mode of study

Not applicable.

Entry knowledge

Not applicable.

Rules for evaluation and completion of the course

Control tests - 20 points
Laboratory and computer exercises - 10 points
Final Exam - 70 points 

 

Aims

To acquaint the students with the principle of operation and performance of transformers, induction machines, DC machines and synchronous machines. The theoretical knowledge are proved in laboratory excerscises
Subject graduate should have been able:
- describe main parts of electric machines,
- know classes of insulation and electrical machines costruction,
- describe construction of transformer,
- explain transformer losses,
- understand and explain single and multiphase transformer operation,
- calculate parameters of transformer equivalent circuit from no-load and short – circuit tests,
- draw and explain phasor diagrams of transformer at no load, at short circuit and generally loaded.
- transformer winding connection and phasor diagram for different hour angle,
- explain and calculate transformer voltage regulation,
- describe and explain construction and principle of operation of induction machine with wound rotor and with squirrel cage,
- describe revolving magnetic field generation,
- define basic kinds of AC machine windings,
- sketch curve of magnetic field of AC winding distributed in more slots,
- draw equivalent induction machine circuit diagram, derive torque equation and draw torque - speed characteristic ,
- describe connection of induction motor into public utility network and speed control,
- describe construction and principle of operation of single phase induction motor,
- describe principle operation and construction of nonsalient synchronous machine,
- draw simplified circuit diagram, derive torque equation and draw phasor diagram,
- explain synchronous generator operation with isolated load and with public utility network, use phasor diagram for explanation,
- explain synchronous compensator principle of operation,
- describe DC machine construction and principle of operation,
- describe basic types of DC machine windings,
- derive torque and induced voltage equations,
- explain properties of DC motors and generators,
- describe construction and explain principle of operation of AC single phase commutator machines. 

Study aids

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Fitzgerald,Kingsley,Kusko::Electric Machinery,McGraw-Hill (EN)
Hrabovcová, V., Rafajdus, P.: Elektrické stroje. Teória a príklady, EDIS ŽU v Žiline, ISBN: 978-80-554-0101-0 (SK)
Juha Pyrhonen, Valeria Hrabovcova, R. Scott Semken, "Electrical Machine Drives Control: An Introduction", ISBN 9781119260455 (EN)
Měřička,Haňka,Voženílek.::Elektrické stroje,ČVUT Praha (EN)
O'Kelly:Performance and Control of Electrical Machines,McGraw-Hill (EN)
P. C. Sen: Principles of Electric Machines and Power Electronics, ISBN: 9781118078877 (EN)
Patočka, M., Magnetické jevy a obvody ve výkonové elektronice, měřicí technice a silnoproudé elektrotechnice, VUTIUM Brno, 2011 (CS)
Stephen Umans: Fitzgerald & Kingsley's Electric Machinery 7th Edition, ISBN: 978-0073380469 (EN)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme BPC-EMU Bachelor's 2 year of study, summer semester, compulsory

Type of course unit

 

Lecture

39 hod., optionally

Teacher / Lecturer

Syllabus

  1. Introduction and Motivation, Magnetism - review and solution of magnetic circuits.
  2. Direct Current Machine - Principle of Operation and Structural Design, derivation of basic equations.
  3. Torque, Generation of Rotating Magnetic Field and Winding of Alternating Electric Machines.
  4. Induction Machine - Design, Principle of Operation, Equivalent Circuit.
  5. Induction Machine - Phasor Diagram and Operating Characteristics.
  6. Synchronous Machine - Theory of Smooth Rotor Machine. Torque Characteristic.
  7. Synchronous Machine - Synchronous Machines with Salient Poles and Permanent Magnets.
 

Computer-assisted exercise

18 hod., compulsory

Teacher / Lecturer

Syllabus

1. Magnetic circuits,

2. DC machines

3. Asynchronous machines

4. Synchronous machines 

Laboratory exercise

8 hod., compulsory

Teacher / Lecturer

Syllabus

1. Principles of safety at work in the laboratory. Familiarization with the laboratory - practice wiring. Magnetism

2. L1 - DC machine.

3. L2 - Asynchronous motor - torque characteristics.