Subject » BMEVIVEM111
Alternating Current Systems
Váltakozó áramú rendszerek
A tantárgyleírás hatályossága
Hatályosság kezdete:
2026. March 21.
Hatályosság vége:
—
| Subject name (Hungarian, English) |
Váltakozó áramú rendszerek
Alternating Current Systems
|
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Subject code | BMEVIVEM111 | ||||||||||||
| Subject type | — | ||||||||||||
| Training Level | — | ||||||||||||
| Course types and hours (weekly/semester) |
|
||||||||||||
| Assessment type | félévközi érdemjegy | ||||||||||||
| Credits | 4 | ||||||||||||
| Subject coordinator |
Dr Kádár István
contact:
kadar.istvan@vik.bme.hu
|
||||||||||||
| Responsible department |
Villamos Energetika Tanszék
|
||||||||||||
| Faculty | Villamosmérnöki és Informatikai Kar | ||||||||||||
| Subject website | http://www.vgt.bme.hu/okt/A_C_S/a_c_s.html | ||||||||||||
| Primary curriculum type | — | ||||||||||||
| Direct prerequisites – Strong prerequisite | none | ||||||||||||
| Direct prerequisites – Weak prerequisite | none | ||||||||||||
| Direct prerequisites – Parallel prerequisite | none | ||||||||||||
| Direct prerequisites – Milestone prerequisite | none | ||||||||||||
| Direct prerequisites – Exclusion | none |
Objectives
Programme
8.1. Single-phase and three-phase RLC circutis
Linear single-phase RLC circuits: current, voltage, power, energy base explanations and expressions, time functions, phasors, harmonics. Problem solutions.
Linear three-phase RLC circuits: current, voltage, power, energy base explanations and expressions, time functions, phasors, symmetrical components, harmonics. Problem solutions.
Single-phase RLC circuit switch on-off transients, energy conversions and steady-state. Problem solutions.
Three-phase (abc+N) Low Voltage system with symmetrical and asymmetrical resistive load: solutions by phase (abc) or symmetrical component (012) method.Problem solutions.
8.2. Alternating magnetic field
Review of fundamentals. Description and illustration of magnetic field, effect of substance, basic rules of electromagnetism, ferromagnetic materials, hysteresis. Self and mutual inductance, coupled windings. Force, torque, energy.
Components and calculation of iron losses in alternating magnetic field,. Magnetic circuits, calculation methodes, leakage.
Energy of coupled windings. Permanent magnets, optimal design. Force of permanent and electromagnets.
Superconduction, influence of magnetic field on superconductors.
8.3. Princip and application of Park-vector for calculation and design
Sinusoidal function - phasor - vector. Physical background of Park transformation, rotating magnetic field. Definítion, cooordinate systems, zero sequence components. Application of Park-vector to scalar values. Park-vector in static and rotating coordinate systems. Park-vector diagram (graph, plot). Phase values and Park-vector.
Description of threephase systems using Park-vector equations. Calculation of voltage, current and flux in steady state, asymmetrical and transient operation. Representation on oscilloscope. Effect of time harmonics. Description of periodic nonsynusoidal state, harmonic analysis. Application example: induction machine fed from six-step inverter.
8.4. Alternating electrical field
Properties of electrical fields. Forces and energies in electrical
fields. Filed distribution in insulators. Analytical and numerical filed
computations. Insulting materials in alternating field. Electrical
conductivity, dielectric polarization and the polarization spectrum.
Alternating voltage on insulation, vector diagram, layered insulation.
Dielectric properties of insulating materials, frequency and temperature
dependence of dielectric properties (dielectric loss and loss factor)
Generation and measurement of alternating electrical fields. Field
distribution of overhead power lines and cables. insulation testing by
ac voltage. Voltage stresses and withstand test.
Linear single-phase RLC circuits: current, voltage, power, energy base explanations and expressions, time functions, phasors, harmonics. Problem solutions.
Linear three-phase RLC circuits: current, voltage, power, energy base explanations and expressions, time functions, phasors, symmetrical components, harmonics. Problem solutions.
Single-phase RLC circuit switch on-off transients, energy conversions and steady-state. Problem solutions.
Three-phase (abc+N) Low Voltage system with symmetrical and asymmetrical resistive load: solutions by phase (abc) or symmetrical component (012) method.Problem solutions.
8.2. Alternating magnetic field
Review of fundamentals. Description and illustration of magnetic field, effect of substance, basic rules of electromagnetism, ferromagnetic materials, hysteresis. Self and mutual inductance, coupled windings. Force, torque, energy.
Components and calculation of iron losses in alternating magnetic field,. Magnetic circuits, calculation methodes, leakage.
Energy of coupled windings. Permanent magnets, optimal design. Force of permanent and electromagnets.
Superconduction, influence of magnetic field on superconductors.
8.3. Princip and application of Park-vector for calculation and design
Sinusoidal function - phasor - vector. Physical background of Park transformation, rotating magnetic field. Definítion, cooordinate systems, zero sequence components. Application of Park-vector to scalar values. Park-vector in static and rotating coordinate systems. Park-vector diagram (graph, plot). Phase values and Park-vector.
Description of threephase systems using Park-vector equations. Calculation of voltage, current and flux in steady state, asymmetrical and transient operation. Representation on oscilloscope. Effect of time harmonics. Description of periodic nonsynusoidal state, harmonic analysis. Application example: induction machine fed from six-step inverter.
8.4. Alternating electrical field
Properties of electrical fields. Forces and energies in electrical
fields. Filed distribution in insulators. Analytical and numerical filed
computations. Insulting materials in alternating field. Electrical
conductivity, dielectric polarization and the polarization spectrum.
Alternating voltage on insulation, vector diagram, layered insulation.
Dielectric properties of insulating materials, frequency and temperature
dependence of dielectric properties (dielectric loss and loss factor)
Generation and measurement of alternating electrical fields. Field
distribution of overhead power lines and cables. insulation testing by
ac voltage. Voltage stresses and withstand test.
The course designed for systematization and high level expansion of the basic knowledge in the field of alternating current circuits, networks, devices, equipment and electrical energy converters in steady-state and transient, in order to provide the students application skills.
Learning outcomes
Ez a tantárgy a KKK rendeletben meghatározott, következő kompetenciák fejlesztését szolgálja:
Knowledge
No learning outcomes recorded.
Skills
No learning outcomes recorded.
Attitudes
No learning outcomes recorded.
Autonomy and responsibility
No learning outcomes recorded.
Oktatási módszertan
Lectures
Tanulástámogató anyagok
Online források
Hambley, A. R.: Electrical Engineering. Pearson, 2011. ISBN-13 978-0-13-215516-8; Lázár J.: Park-Vector Theory of Line-Commutated Three-Phase Bridge Converters. OMIKK Publisher, Budapest, 1987. ISBN 963 592 727 4
Recommended preliminary knowledge for completing the subject
Knowledge type competencies
(azon előzetes ismeretek összessége, amelyek megléte nem kötelező, de a tantárgy eredményes teljesítését nagyban elősegíti)
Mathematics: linear algebra, matrix calculus, complex numbers and complex calculus, linear differential equations
Electrical engineering
Skill type competencies
(azon előzetes képességek és készségek összessége, amelyek megléte nem kötelező, de a tantárgy eredményes teljesítését nagyban elősegíti)
nincs
Recommended (non-compulsory) preliminary competencies
(azon ajánlott (nem kötelező) előzetesen megszerzendő kompetenciák összessége, amelyek jelentősen hozzájárulnak a tantárgy eredményes teljesítéséhez)
Mathematics: linear algebra, matrix calculus, complex numbers and complex calculus, linear differential equations
Electrical engineering
General rules
Additional possibilities:
Four tests are written during the semester, the grade determined as the average of tests.
Assessment methods
In-term assessments
No detailed assessments provided.
Weight of in-term assessments
No weights provided.
Exam-period assessments
No detailed assessments provided.
Weight of exam elements
No weights provided.
Grade calculation
No grade thresholds provided.
Attendance requirements
No attendance requirements provided.
Rules for retake and resubmission
Not provided.
Short description
Not provided.
Detailed description
Not provided.
Recommended courses
-
Workload to complete the subject
No workload breakdown provided.
Validity of subject requirements
Requirements valid from:
—
Requirements valid until:
—
Curriculum placement
No curriculum placements recorded for this subject version.