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Lecturer(s)
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Kůs Václav, Prof. Ing. CSc.
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Skála Jiří, Doc. Ing. Ph.D.
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Martínek Petr, Ing. Ph.D.
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Drábek Pavel, Doc. Ing. Ph.D.
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Kubík Zdeněk, Ing. Ph.D.
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Müllerová Eva, Doc. Ing. Ph.D.
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Fořt Jiří, Ing. Ph.D.
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Hromádka Miroslav, Ing. Ph.D.
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Course content
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1.Influences of inverters on power supply. Harmonic, interharmonic currents of convertors. Power, power factor. 2. Methods of minimalisation of negative influences on the power supply. Filtration and compensation. Design of passive filters. 3. Network impedance, calculations. Flicker. Influence of network failures on inverters. 4. Measuring harmonics, active filters. Standards for low frequency EMC. Quality of el. energy. 5. Influence of inverters on powered equipment and ways of removing these influences. 6. Basic interference sources and their characteristics. Interference coupling mechanisms in near and far field - capacitive, inductive, conductive and radiated coupling. 7.Suppression of interference signals - basic components for filters, common and differential mode of interference signal. Parasitic reactance of capacitors and inductors, components for transient suppression. 8. Suppression of interference signals - filters. Insertion loss of filters, insertion loss dependence on input and output impedance, filter configuration. Electromagnetic shielding - shielding effectiveness, material for shielding. 9. Device design in terms of electromagnetic compatibility - mechanical design. Ventilation holes of shielding boxes, cable bushings, special shielding materials, PCB desig. 10. EMC product evaluation procedure, immunity - performance criteria, emission - limit lines, uncertainties evaluation, requirements of testing laboratory, on site testing. 11.Electromagnetic immunity test methods, generators of interfering signals, standard coupling methods and CDN's for different lines, test area requirements and tests configurations according to IEC 61000-4-2, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-8, 9, 11, IEC 61000-4-12. 12. Electromagnetic immunity test methods, rf disturbing signal generators, coupling and decoupling circuits, CDN calibration, transmitting antenna, measuring rooms requirements and tests configurations according to IEC 61000-4-3, IEC 61000-4-6, verification of electric field inside anechoic chamber using electric field probe, NSA evaluation. 13. EMI measurement methods. Conducted emissions measurements, EMI receiver requirements, artificial networks, voltage and current probes. Radiated emissions measurements, parameters of measuring components, receiving antenna, antenna factor (AF, RAF), near field probes, test site types (OATS, FAR, SAC). 13.
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Learning activities and teaching methods
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Laboratory work, Lecture
- Contact hours
- 52 hours per semester
- Preparation for formative assessments (2-20)
- 13 hours per semester
- Preparation for an examination (30-60)
- 38 hours per semester
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| prerequisite |
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| Knowledge |
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| Utilize basic knowledge of the power electronics |
| Utilize basic knowledge of the power engineering |
| Utilize basic knowledge of the electrical machines |
| Utilize basic knowledge of electronics |
| To explain basic relations from electromagnetic field theory |
| To describe the connection possibilities for measuring of current, voltage and power. |
| Skills |
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| To apply signal measurement and processing techniques |
| Describe the function of basic power electronics converters |
| To describe the origin and character of resonances it circuits with passive components. |
| To select and connect a suitable voltmeter, current meter and power meter to the circuit. |
| Competences |
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| N/A |
| learning outcomes |
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| Knowledge |
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| To describe the current waveforms, which are taken from the power net and their negative influence to the net. |
| To explain the issue of low-frequency disturbances, including to the effects on engines. |
| Describe ways to minimize these negative phenomena. |
| Know how to calculate to the network impedances and harmonic voltages. |
| To explain EMC energy measurement. |
| To describe a general interference couplings between systems. |
| To enumerate interference sources, to characterize basic electronic parts for signal suppression - capacitors and inductors, to describe a basic topology of LC filters. |
| To describe electronic parts for transient suppression. |
| To describe procedures and modifications in design of the device in terms of decreasing of radiated emission, |
| To describe procedures and modifications in design of the device in terms of increasing of device immunity. |
| To explain immunity test procedure. |
| To explain emissions measuring methods and specify measuring devices requirements,. |
| To specify test program according to a type of tested product. |
| Skills |
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| To calculate the harmonic current of the inverters. |
| Determines their distribution across the network and suggests a filtering compensation device. |
| Determines the size of overvoltage on the motor in the inverter - cable - motor system, suggests measures to reduce overvoltage. |
| Can calculate flicker, make a proposal to minimize this negative effects. |
| To draw basic interference couplings between a source and a receiver of electromagnetic interference. |
| To classify an electromagnetic interference source according to its characteristics. |
| Select a suitable capacitor or inductor for a specific application, to use a suitable LC filter and measure its parameters. |
| To apply a suitable surge suppression part according to signal transient character. |
| To perform modifications in the design of the device in terms of increasing of device immunity. |
| To apply immunity test procedure to a specific product. |
| To assemble measuring system and realize emission measurement . |
| Competences |
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| N/A |
| N/A |
| teaching methods |
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| Knowledge |
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| Lecture |
| Practicum |
| Group discussion |
| E-learning |
| Skills |
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| Lecture |
| E-learning |
| Self-study of literature |
| Competences |
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| Lecture |
| Practicum |
| Group discussion |
| assessment methods |
|---|
| Knowledge |
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| Oral exam |
| Test |
| Individual presentation at a seminar |
| Skills |
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| Oral exam |
| Skills demonstration during practicum |
| Individual presentation at a seminar |
| Competences |
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| Oral exam |
| Individual presentation at a seminar |
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Recommended literature
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Adamczyk, Bogdan. Foundations of electromagnetic compatibility : with practical applications. First published. 2017. ISBN 978-1-119-12078-0.
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Kůs, Václav. Nízkofrekvenční rušení. 1. vyd. Plzeň : Západočeská univerzita, 2003. ISBN 80-7082-976-1.
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Kůs, Václav; Skála, Jiří,; Hammerbauer, Jiří. Elektromagnetická kompatibilita výkonových elektronických systémů. Praha : BEN - technická literatura, 2013. ISBN 978-80-7300-476-7.
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Ott, Henry W. Electromagnetic compatibility engineering. Hoboken : John Wiley & Sons, 2009. ISBN 978-0-470-18930-6.
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Weston, David A. Electromagnetic compatibility : methods, analysis, circuits, and measurement. Third edition. 2017. ISBN 978-1-4822-9950-2.
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