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Course info
KET / DMAT
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Course description
Department/Unit / Abbreviation
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KET
/
DMAT
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Academic Year
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2023/2024
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Academic Year
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2023/2024
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Title
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Dielectric materials in el. engineering
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Form of course completion
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Exam
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Form of course completion
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Exam
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Long Title
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Dielectric materials in electrical engineering
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Accredited / Credits
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Yes,
5
Cred.
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Type of completion
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Combined
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Type of completion
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Combined
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Time requirements
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Lecture
2
[Hours/Week]
Tutorial
2
[Hours/Week]
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Course credit prior to examination
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Yes
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Course credit prior to examination
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Yes
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Automatic acceptance of credit before examination
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No
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Included in study average
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YES
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Language of instruction
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Czech, English
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Occ/max
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|
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Automatic acceptance of credit before examination
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No
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Summer semester
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13 / -
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0 / -
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0 / -
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Included in study average
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YES
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Winter semester
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0 / -
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0 / -
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0 / -
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Repeated registration
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NO
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Repeated registration
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NO
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Timetable
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Yes
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Semester taught
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Summer semester
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Semester taught
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Summer semester
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Minimum (B + C) students
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10
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Optional course |
Yes
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Optional course
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Yes
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Language of instruction
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Czech, English
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Internship duration
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0
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No. of hours of on-premise lessons |
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Evaluation scale |
1|2|3|4 |
Periodicity |
každý rok
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Evaluation scale for credit before examination |
S|N |
Periodicita upřesnění |
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Fundamental theoretical course |
Yes
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Fundamental course |
No
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Fundamental theoretical course |
Yes
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Evaluation scale |
1|2|3|4 |
Evaluation scale for credit before examination |
S|N |
Substituted course
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None
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Preclusive courses
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N/A
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Prerequisite courses
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N/A
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Informally recommended courses
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N/A
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Courses depending on this Course
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KET/SNTME
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Histogram of students' grades over the years:
Graphic PNG
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XLS
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Course objectives:
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The course will, based on the material knowledge gained in the previous study, extend the phenomenological knowledge by the detailed characteristics of dielectric materials, the description of the physical processes and accompanying behavior of dielectrics and insulation materials in the electric field, the nature of polarization processes, explaining dielectric conductivity, thermal conductivity, behavior of materials in DC, AC and pulse electric fields. Students will acquire knowledge about the causes of conductivity phenomena of dielectrics, dielectric absorption, dielectric losses, complex permittivity and electrical strength, including theories of the breakdown. This will include a description of phenomena associated with space charge generation, mechanisms of capture and migration of free charge carriers, deformation of the internal electric field, partial discharges, electrical treeing, or interactions of nanocomposites with the basic matrix. The properties of selected dielectrics in different states, principles, and advantages of composite materials and their components will be explained. The properties of dielectric materials will be discussed depending on the temperature, voltage, frequency, time and presence of the influencing factors. In the next part of the course, students are acquainted with individual types of composite materials based on their properties and utilization in the field of engineering. The course deals with the structure and properties of insulating materials and insulation systems for individual machinery. Students will be introduced to problematics of individual thermal classes of insulating materials with respect to their resistance to degradation factors. The acquired knowledge will allow graduates to design the appropriate composition of new electrical insulation structures.
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Requirements on student
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Pass before exam: 100% Presence on tutorial, seminary project and its presentation followed by discussion, Skills demonstration, seminar activity
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Content
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1. Dielectrics and insulating materials, dielectric circuits of electrical devices, reliability
2. Interaction of matter and electric field, the polarization of dielectrics from a macroscopic and microscopic point of view
3. Local internal fields in dielectrics, the polarization of dielectrics and its types.
4. Deformation polarization, relaxation polarization, double potential well model, ionic and dipole relaxation polarization.
5. Migration polarization, space charge and its influence on dielectric behavior, mathematical description of non-homogeneous dielectric behavior
6. Dielectric losses, dielectric absorption
7. The electrical conductivity of gaseous, liquid and solid dielectrics
8. Electric strength of gaseous, liquid and solid dielectrics
9. Major degradation factors, tests, standard tests, electrode systems
10. Composites electrical insulating materials and their components
11. Classification of insulation materials and systems based on thermal class
12. Modern electrical insulation materials, Nanocomposite dielectrics
13. Examples, models, applications in practice, evaluation
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Activities
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Fields of study
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V anglická verzi předmětu je připraven výukový systém využívající moodle. V České variantě jsou stále přednášky v coursewaru.
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Guarantors and lecturers
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Guarantors:
Prof. Ing. Pavel Trnka, Ph.D., MBA ,
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Lecturer:
Prof. Ing. Radek Polanský, Ph.D. (15%),
Prof. Ing. Pavel Trnka, Ph.D., MBA (85%),
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Tutorial lecturer:
Ing. Jaroslav Hornak, Ph.D. (30%),
Ing. Petr Kadlec, Ph.D. (40%),
Doc. Ing. Josef Pihera, Ph.D. (30%),
Prof. Ing. Pavel Trnka, Ph.D., MBA (100%),
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Literature
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Basic:
Raju, G.G. Dielectrics in Electric Field. CRC Press, 2017. ISBN 9781315350424.
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Basic:
Mentlík, Václav. Dielektrické prvky a systémy. 1. vyd. Praha : BEN - technická literatura, 2006. ISBN 80-7300-189-6.
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Extending:
Stone G. Electrical Insulation for Rotating Machines Design, Evaluation. Wiley, 2014. ISBN 9781118057063.
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Extending:
Trnka P. Engineering Dielectric Liquid Applications. Basel, Beijing, 2018. ISBN 978-3-03897-402-4.
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Extending:
Saha T.K.. Transformer Ageing - Monitoring and Estimation Techniques. Wiley, 2017. ISBN 9781119239963.
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Recommended:
Chang S, Parinov I., et. al. Advanced Materials. 2014. ISBN 978-3-319-03749-3.
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Recommended:
F. Kremer and A. Schönhals. Broadband dielectric spectroscopy. New York: Springer, 2003. ISBN 35-404-3407-0.
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Recommended:
Hippel A. Dielectric Materials and Applications. Artech House, Boston London. ISBN 1-58053-123--7.
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Recommended:
K. Ch. Kao. Dielectric phenomena in solids: with emphasis on physical concepts of electronic processes. Boston: Elsevier Academic Press,, 2004. ISBN 01-239-6561-6.
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Recommended:
V. Raicu, Y. Feldman. Dielectric Relaxation in Biological Systems: Physical Principles, Methods, and Applications.. Oxford University Press, 2014. ISBN 9780199686513.
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Recommended:
Gorur Govinda Raju. ielectrics in Electric Fields: Tables, Atoms, and Molecules. CRC Press, 2016. ISBN 9781482231137.
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On-line library catalogues
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Time requirements
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All forms of study
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Activities
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Time requirements for activity [h]
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Contact hours
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26
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Graduate study programme term essay (40-50)
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43
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Preparation for an examination (30-60)
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38
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Practical training (number of hours)
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26
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Total
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133
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Prerequisites
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Knowledge - students are expected to possess the following knowledge before the course commences to finish it successfully: |
to clarify the basic properties of dielectric materials |
use basic theories of electrical circuits |
use knowledge of the basics of electrical engineering |
Skills - students are expected to possess the following skills before the course commences to finish it successfully: |
use basic mathematical and statistical procedures |
apply material knowledge |
Competences - students are expected to possess the following competences before the course commences to finish it successfully: |
N/A |
N/A |
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Learning outcomes
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Knowledge - knowledge resulting from the course: |
explain the basic principles of function/ role of dielectric within an electric circuit |
describe polarization proces in a dielectric |
describe the behavior of dielectrics in alternating and dc fields |
justify the choice of the appropriate material in relation to the intended use |
Skills - skills resulting from the course: |
measure the complex permittivity of the dielectric material and analyze the data |
describe the occurrence of the spatial charge and measure it |
Competences - competences resulting from the course: |
N/A |
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Assessment methods
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Knowledge - knowledge achieved by taking this course are verified by the following means: |
Combined exam |
Skills demonstration during practicum |
Individual presentation at a seminar |
Skills - skills achieved by taking this course are verified by the following means: |
Skills demonstration during practicum |
Individual presentation at a seminar |
Competences - competence achieved by taking this course are verified by the following means: |
Combined exam |
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Teaching methods
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Knowledge - the following training methods are used to achieve the required knowledge: |
Lecture |
Lecture with visual aids |
Skills - the following training methods are used to achieve the required skills: |
Practicum |
Lecture |
Seminar |
Competences - the following training methods are used to achieve the required competences: |
Lecture |
Lecture with visual aids |
Practicum |
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