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
Number of ECTS credits
Mode of study
Guarantor
Entry knowledge
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
Prerequisites and corequisites
Basic literature
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
Classification of course in study plans
- Programme BPC-EMU Bachelor's 2 year of study, summer semester, compulsory
Type of course unit
Lecture
Teacher / Lecturer
Syllabus
- Introduction and Motivation, Magnetism - review and solution of magnetic circuits.
- Direct Current Machine - Principle of Operation and Structural Design, derivation of basic equations.
- Torque, Generation of Rotating Magnetic Field and Winding of Alternating Electric Machines.
- Induction Machine - Design, Principle of Operation, Equivalent Circuit.
- Induction Machine - Phasor Diagram and Operating Characteristics.
- Synchronous Machine - Theory of Smooth Rotor Machine. Torque Characteristic.
- Synchronous Machine - Synchronous Machines with Salient Poles and Permanent Magnets.
Computer-assisted exercise
Teacher / Lecturer
Syllabus
2. DC machines
3. Asynchronous machines
4. Synchronous machines
Laboratory exercise
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.