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FEKT-BPC-ESBAcad. year: 2024/2025
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
Department
Entry knowledge
Rules for evaluation and completion of the course
Control tests - 20 pointsLaboratory and computer exercises - 10 pointsFinal Exam - 70 points
Aims
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Prerequisites and corequisites
Basic literature
Recommended reading
Classification of course in study plans
Lecture
Teacher / Lecturer
Syllabus
1. Introduction and motivation Magnetism - repetition and solving magnetic circuits.2. Transformer - design, working principle and ideal transformer.3. Transformer - Real transformer, substitution scheme, basic equations.4. Transformer - Three phase transformers, winding connection and parallel operation.5. Torque production, generation of spinning magnetic field and windings of AC electrical machines.6. Asynchronous machine - Design, principle of operation, alternate circuit.7. Asynchronous machine - phasor diagram and operating characteristics.8. Asynchronous machine - starting three-phase asynchronous motors from the mains, speed control and single-phase asynchronous machines. Synchronous machine - Principle of operation, design, phasor diagrams.9. Synchronous machine - Theory of smooth rotor machine. Moment characteristics, synchronous machine operating into independent load and in parallel with the grid.10. Synchronous machine - Synchronous machines with salient poles and permanent magnets.11. DC machine - Principle of operation and design, derivation of basic equations.12. DC machine - Operating characteristics of DC machines in steady state.13. Electric machines in electrification of transport - Overview of modern trends.
Laboratory exercise
1. Principles of safety at work in the laboratory. Familiarization with the laboratory - practice wiring.2. N1 - Magnetic circuits.3. N2 - Transformers.4. L1 - Transformers: replacement parameters, loading and transformer efficiency.5. KT1 - Magnetic circuits and transformers.6. N3 - Torque production, magnetic field torque generation and windings of AC electrical machines.7. N4 - Asynchronous machine.8. L2 - Asynchronous motor - torque characteristics.9. L3 - Asynchronous motor - distribution of losses and calculation of parameters of the replacement scheme.10. N5 - Synchronous machine.11. KT2 - Asynchronous and synchronous machines.12. L4 - DC machine.13. Spare laboratory
Where: N - numerical exercise, L - laboratory exercise, KT - control test.