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Lecturer(s)
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Dražan Jiří, Ing.
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Skalický Martin, Ing.
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Skala Bohumil, Doc. Ing. Ph.D.
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Veg Lukáš, Ing. Ph.D.
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Kindl Vladimír, Doc. Ing. Ph.D.
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Blahník Vojtěch, Ing. Ph.D.
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Šobra Jan, Ing. Ph.D.
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Pechánek Roman, Doc. Ing. Ph.D.
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Sobotka Lukáš, Ing.
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Course content
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Lectures: 1) Transformer - Principle of operation, equivalent circuit, loss and efficiency, magnetizing current 2) Transformer - modes of operation, no-load test, short-circuit test, load test, types of connection, equations, phasor diagrams, per unit quantities. 3) Transformer - Multiphase transformers - wiring, vector group, parallel operation 4) Electromechanical conversion - magnetic field pulsing and rotating, the rotating field in electrical machines, comparison of 2f and 3f fields. 5) Asynchronous machine - construction, principle of operation, equivalent circuit, wiring, slip, energy balance, phasor diagram. 6) Asynchronous machine - torque characteristic, starting, limitation of the starting current 7) Speed control, braking, 1-phase asynchronous machines 8) Synchronous machine-principle of operation, construction, no-load test and short circuit test, introduction of d-q coordinate system, reactance, equivalent circuit. 9) Synchronous machine - Synchronous generator in cooperation with network and self operating mode, Phasor diagram, torque characteristic, synchronous motors with permanent magnets. 10) DC Machines - Principle of operation, construction, equivalent circuit, types of DC motors, 1-phase universal motors, starting, braking, reversing. 11) Electronically controlled electric machines: Step motors, switched reluctance machine (SRM). 12) electronically controlled electric machines: Permanent magnets (PM) for electric machines - electric machines with permanent magnets, ultrasonic motors, PMSM, BLDC. 13) Motors for electronic devices, linear motors, actuators, power equation Laboratory classes: 1. Introduction, principle of measurement, instruments 2. Theory - transformer. Design, no load test, short circuit test, the 50 vs 60 Hz network, basic calculation 3. Measurement no.1 - 3ph transformer. Resistivity measurement, no-load test, voltage ratio 4. Theory - transformer. Multi-phase transformer, Parallel operation, per unit value, basic calculation 5. Measurement no.2 - Reactive power compensation 6. Theory - asynchronous machine. Basic design, rotor description, terminal box, name-plate parameters, induced voltage, basic calculation 7. Measurement no.3 - Asynchronous machine I. Slip measurement 8. Theory - asynchronous machine. Torque relation, energy balance, currents and voltage in various winding connection, circle diagram, self-operated asynchronous generator 9. Measurement no.4 - Asynchronous machine II. No load test, resistivity measurement 10. Theory - synchronous machine. Self-operated generator and generator on the network 11. Measurement no.5 - Asynchronous machine III. Y-D comparison 12. Theory - DC machine, commutation. Permanent magnets machines, special machines 13. Conclusion, check reports
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Learning activities and teaching methods
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- unspecified
- 45 hours per semester
- Contact hours
- 20 hours per semester
- Contact hours
- 65 hours per semester
- Presentation preparation (report) (1-10)
- 4 hours per semester
- Preparation for laboratory testing; outcome analysis (1-8)
- 20 hours per semester
- Preparation for an examination (30-60)
- 50 hours per semester
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| prerequisite |
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| Knowledge |
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| describe principles of resistivity measurement, voltage and current measurement |
| describe the Lenz's law, Faraday laws and Kirchhoff's law |
| have a good command of electrical magnitudes signage and its physical units |
| have a good command of relations of physical magnitudes and its units conversion |
| Skills |
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| Propose the instrument connection for power measurement in 3phase network |
| Analyze interaction between magnetic fields and electric current in wire |
| Apply basic mathematical relations and electrical relations |
| learning outcomes |
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| Knowledge |
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| explain the principles of operation of transformers and electrical machines |
| have a good command of relations necessary for solution |
| Skills |
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| apply the knowledge of the measurement in DC current circuits and perform the analysis of the electrical drive, summarize the requirements posed on it |
| sketch out the scheme of a given existing connection of an electrical machine and perform the analysis of the electrical drive, summarizing the requirements placed upon it |
| put the given connection into operation under the laboratory conditions |
| Competences |
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| N/A |
| N/A |
| N/A |
| teaching methods |
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| Knowledge |
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| Lecture |
| Skills |
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| Laboratory work |
| Competences |
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| Students' portfolio |
| assessment methods |
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| Knowledge |
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| Combined exam |
| Individual presentation at a seminar |
| Skills |
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| Practical exam |
| Skills demonstration during practicum |
| Competences |
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| Practical exam |
| Skills demonstration during practicum |
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Recommended literature
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Bartoš, Václav. Elektrické stroje. 1. vyd. V Plzni : Západočeská univerzita, 2006. ISBN 80-7043-444-9.
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Hrabovcová, Valéria. Moderné elektrické stroje. 1. vyd. Žilina : Žilinská univerzita, 2001. ISBN 80-7100-809-5.
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Juha Pyrhönen, Tapani Jokinen, Valéria Hrabovcová. Design of rotating electrical machines. Chichester, 2014. ISBN 978-1-118-58157-5.
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