Course detail
Electrical Machines
FEKT-BPC-ELMAcad. year: 2022/2023
The course provides an overview of different types of electrical machines and drives. DC machines, asynchronous machines, synchronous machines and transformers are discussed. After completing this course, students should have an overview of the different types of electrical machines and their use in drive systems and should be able to describe the steady-state characteristics of these machines as well as their operating principles.
Language of instruction
Number of ECTS credits
Mode of study
Guarantor
Learning outcomes of the course unit
- 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.
Prerequisites
-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.
Co-requisites
Planned learning activities and teaching methods
Assesment methods and criteria linked to learning outcomes
Independent activities - 18 points
Control test - 12 points
Oral exam - 70 points
Course curriculum
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.
Work placements
Aims
Specification of controlled education, way of implementation and compensation for absences
Recommended optional programme components
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
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