Course detail
Electrical Machines
FEKT-BPC-ELMAcad. year: 2023/2024
1) Seminar - introduction
2) Electromechanical energy conversion
3) Transformers - theory, equivalent circuit diagram
4) Transformers - transformer tests, working conditions
5) Induction machines - theory, princip of operation
6) Induction machines - equivalent circuit diagram
7) Induction machines - torque equations, working conditions
8) Synchronous machines - princip of operation, equivalent circuit diagram
9) Synchronous machines - working charakteristics, cooperation with grid
10) DC machines - principle of operation, basic equations
11) DC machines - equivalent circuit diagram, working conditions
12) Seminar
13) Seminar
Language of instruction
Number of ECTS credits
Mode of study
Guarantor
Entry knowledge
-explain and define basic terms magnetic field, electric field, magnetic field, circuits with lumped and distributed parameters,
- solve DC, AC and magnetic circuits,
- solve three phase AC circuits,
- define the terms work and energy,
- describe and explain basic properties soft and hard magnetic materials.
Rules for evaluation and completion of the course
Independent activities - 18 points
Control test - 12 points
Oral exam - 70 points
Aims
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
Jacek F. Gieras. Electrical Machines : Fundamentals of Electromechanical Energy Conversion. CRC Press. 2020. ISBN13 9780367736941 Electrical Machines : Fundamentals of Electromechanical Energy Conversion. (EN)
Jan A. Melkebeek. Electrical Machines and Drives : Fundamentals and Advanced Modelling. Springer International Publishing AG. 2018. ISBN13 9783319892030 (EN)
MĚŘIČKA, HAMATA, VOŽENÍLEK. Elektrické stroje. Praha: ČVUT, 2000. ISBN: 80-01-02109-2
O'KELLY. Performance and Control of Electrical Machines. McGraw-Hill, 1990. ISBN13: 9780077072384
Recommended reading
Elearning
Classification of course in study plans
Type of course unit
Lecture
Teacher / Lecturer
Syllabus
1. Introduction and familiarisation with the organisation of the course
2. Magnetism - repetition of the basic theory
3. Transformer - principle of operation
4. Transformer - construction and operating characteristics
5. Rotating magnetic field - principle of formation and importance in electrical machines
6. AC machine windings - design and basic concepts
7. Induction machine - principle of operation
8. Induction machine - design and operating characteristics
9. Synchronous machine - principle of operation of synchronous machine with wound rotor
10. Synchronous machine - design and operating characteristics
11. Synchronous machine - principle of operation of a permanent magnet synchronous machine
12. DC machine - principle of operation, construction and operating characteristics
13. Electric machines in the electrification of transport - an overview of modern trends.
Fundamentals seminar
Teacher / Lecturer
Syllabus
1. Introduction and familiarisation with the organisation of the training exercise
2. Presentation of individual activities 1 - Transformers
3. Laboratory 1 - Transformers
4. Presentation of independent activities 2 - Transformers
5. Numerical exercise 1 - Magnetic circuits and transformers.
6. Presentation of independent activities 3 - Asynchronous machines.
7. Presentation of independent activities 4 - Asynchronous machines.
8. Numerical exercise 2 - Asynchronous machines
9. Laboratory 2 - Asynchronous and synchronous machines
10. Numerical exercise 3 - Synchronous machines
11. Presentation of independent activities 5 - Synchronous machines.
12. Presentation of independent activities 6 - Synchronous machines.
13. Control test
Elearning