420-4026/02 – Selected Chapters from Electrodynamics (VKED)
| Gurantor department | Department of Electrical Engineering | Credits | 6 |
| Subject guarantor | doc. Ing. Lubomír Ivánek, CSc. | Subject version guarantor | doc. Ing. Lubomír Ivánek, CSc. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 1 | Semester | summer |
| | Study language | Czech |
| Year of introduction | 2020/2021 | Year of cancellation | 2021/2022 |
| Intended for the faculties | FEI | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
- to lead the students so they could affect in the design practice to magnetic forces, whether in cases where the effect is desired (electric motors, solenoids, etc.) or when it is needed the force action respected as a secondary issue in the design of electrical equipment (switchgear, substations, cable management, ...)
- to familiarize students with the dangers of static electricity in the projected facilities associated with the storage of bulk materials, production and processing of paper, plastic foil, in the projection of hospital space, etc.
- to highlight the possibility of capacitive interaction between the various electrical devices, to handle calculation of capacity of lines, busbars, etc.
- to handle calculation of inductance conductors, induction interaction effect on the function of projected facilities
- to point out the change in electrical resistance with temperature and frequency (skin effect), to explain the mechanism of transmission of electric energy in the surrounding area the conductor
- to supplement the information of electromagnetic compatibility problems of interference radiated energy
- to lead the students to use modern mathematical methods and software tools (QField, COMSOL) to visualize the electromagnetic field, for calculations of forces and calculation of parameters of electrical equipment
Teaching methods
Lectures
Tutorials
Summary
The subject is based on the requirements of designers for solving electrodynamic phenomena especially in heavy current electrical engineering. These problems were consulted with workers from various industrial companies and also based on the experience of the teacher in his design work at the project company ENERGOPROJEKT. The subject deals with the power effect of the electric field (separators, limitation of static electricity in the operations) and mainly with force effect of magnetism (forces in switchboards and switchboards, forces between busbars, interaction of cable distribution forces, etc.). An integral part consists of calculations of conduction capacities of various configurations, calculations of inductances of electrical devices, calculations of current conduction parts in dependence on frequency (skinefekt) and conduction of insulating elements. The course introduces students to the issue of electromagnetic compatibility in relation to radiated and received interfering energy.
Compulsory literature:
Ivánek,L.: Selected Chapters from electrodynamics - lectures
Ivánek,L., Zajaczek,S.: Selected Chapters from electrodynamics - tutorials on exercises
Recommended literature:
Way of continuous check of knowledge in the course of semester
Obhajoba všech protokolů z laboratorních cvičení a projektu. Závěrečná zkouška - zodpovězení otázek vymezených v Moodle.
E-learning
Ivánek, L., Zajaczek, S.: Vybrané kapitoly z elektrodynamiky - studijní podklady v lms moodle.
Other requirements
Required is basic knowledge of physics. From math are expected knowledge of complex variables.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Lectures:
1. Fundamentals of mathematics for description of physical field - vector calculus.
2. Physical units used in electrical engineering.
3. Physical principle of electromagnetic phenomena, distribution of electromagnetism in dependence on frequency.
4. Importance of Maxwell's equations in electrical engineering - connection with basic electrical engineering equations.
5. Use of electric field in industrial facilities.
6. Principles of electrical conductivity, dependence of conductivity on temperature, superconductivity.
7. Contact resistance, step potential, principles of earth resistance measurement.
8. Practical calculations of cable capacities and different types of lines.
9. Inductance and its determination in electrical equipment.
10. Energy conditions in electrical engineering.
11. Power manifestations of electromagnetism in electromagnets, electric motors and other electrical devices.
12. Eddy currents, surface and proximity phenomena, shielding of electromagnetic fields.
13. Electromagnetic interference due to wave radiation.
14. Effect of electromagnetic fields of different frequencies on human organism.
Computational exercises
1. Gauss theorem, Ampere's law, Biot-Savart's law.
2. Massive conductor resistance calculations.
3. Calculations of capacitances and inductances for simple geometric arrangement of conductors.
4. Energy calculations in power systems.
5. Calculations of forces in power systems.
Labs:
1. Methods of mapping of electromagnetic fields.
2. Force action of two conductors in different positions relative to each other
3. Effect of skin effect on impedance of conductive objects
4. Dependence of impedance of coil without core and with different types of cores on frequency
5. Frequency-dependent behavior of cables.
Projects performed by computers:
1. Visualization of the effects of electrostatics in a specific case
2. Solving the effects of the magnetic field busbar
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction