# Budapest University of Technology and Economics, Faculty of Electrical Engineering and Informatics

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Electrotechnics

A tantárgy neve magyarul / Name of the subject in Hungarian: Elektrotechnika

Last updated: 2021. március 17.

Budapest University of Technology and Economics
Faculty of Electrical Engineering and Informatics
 BSc Electrical Engineering
 Course ID Semester Assessment Credit Tantárgyfélév VIVEAB00 3 3/0/1/f 5
3. Course coordinator and department Dr. Veszprémi Károly,
4. Instructors

Dr. István Kiss assoc. prof., Department of Electric Power Engineering

Dr. László Farkas,  assoc. prof., Department of Electric Power Engineering

Dr. László Számel, assoc. prof., Department of Electric Power Engineering

5. Required knowledge Physics, Signals and systems
6. Pre-requisites
Kötelező:
((TárgyEredmény( "BMEVIHVA109" , "jegy" , _ ) >= 2
VAGY
TárgyEredmény( "BMEVIHVAA00" , "jegy" , _ ) >= 2)

ÉS NEM ( TárgyEredmény( "BMEVIVEA201", "jegy" , _ ) >= 2
VAGY TárgyEredmény("BMEVIVEA201", "FELVETEL", AktualisFelev()) > 0) )

ÉS (Training.Code=("5N-A7") VAGY Training.Code=("5N-A7H") VAGY Training.Code=("5NAA7"))

A fenti forma a Neptun sajátja, ezen technikai okokból nem változtattunk.

A kötelező előtanulmányi rendek grafikus formában itt láthatók.

Ajánlott:

Physics 1-2, Signals and systems 1-2

7. Objectives, learning outcomes and obtained knowledge To teach those knowledge in Electrotechnics, which is necessary for every electrical engineering student. It provides foundation to subject Electrical Energetics and the Electrical energetics specialisation.
8. Synopsis

History. Electricity as energy carrier. AC, DC Current systems. Multiphase systems.

Practical circuit calculation methods

Definition of the active, reactive power in single phase and 3-phase systems. Calculations with instantaneous values and phasors. Positive directions. Definition of the power sign. Y-D conversion. Nominal values. Per-unit system.

Practical calculation methods of energy converters

Calculation methods of magnetic circuits. Symmetrical components method. Three-phase vectors.

Transformers

Magnetic materials. Hysteresis and eddy-current losses. Induced voltage. Excitation balance law. Equivalent circuit and its parameters. Phasor diagram. No-load and short-circuit. Definition of the DROP. 3-phase transformers, connections, phase-shift, parallel connection.

Magnetic field of the electromechanical energy converters

Magnetic fields of the electrical machines: stationary, pulsating and rotating field. Generation of the rotating field. Torque development. Frequency condition.

Operation principles of the basic electromechanical energy converters

3-phase synchronous machine. Condition of the steady-state torque. Synchronous speed. Cylindrical synchronous machine. Equivalent circuit. Pole-voltage, armature voltage, synchronous reactance.

3-hase induction machine. Condition of the steady-state torque. Slip-ring and squirrel-cage rotor. The slip. Equivalent circuit.

The DC machine. The commutation.

Power electronics, electrical drives

Basic converter connections. Electrical drives: starting, braking, speed modification.

Electrotechnical environment protection

Electromagnetic compatibility (EMC). Low and high frequency effects. Electrostatic discharge. Electromagnetic impulses.

Electrical safety regulations

Basics, methods, limits, measurements.

Electrical energy storage

Chemical, electrical, magnetic, mechanical energy storage. Fuel-cells.

Electrotechnical applications, trends

Requirements of sustainable development. Application of alternative energy sources. Alternative electrical vehicles. New materials and technologies. Superconductivity.

Laboratory practices:

·         Investigation of high-voltage discharges.

·         Electric shock protection.

·         The transformer.

·         Electrical rotating machines.

·         Non-conventional energy converters.

9. Method of instruction 4 lectures per week,  5 laboratory excercises
10. Assessment

Two midsemester tests. 5 laboratory exercises.

The semester mark is formed from the results.

11. Recaps

One laboratory exercise can be repeated.

One-one repeated test for both midterm tests during the semester. One test can have one more repeated on the repetition week.

12. Consultations At time and date agreed by the lecturers.
13. References, textbooks and resources

Lecture notes from the webpage of the department.

14. Required learning hours and assignment
 Contact hours 70 Preparation for contact hours 20 Preparation for the midterm 30 Learning at home Preparation for the measurements 30 Homework assignments 0 Preparation for the exam 0 Total workload 150
15. Syllabus prepared by

Dr.Károly Veszprémi Professor, Department of Electric Power Engineering

Dr.István Vajda Professor,  Department of Electric Power Engineering

Dr.István Berta Professor,  Department of Electric Power Engineering