Óbudai Egyetem Kandó Kálmán Villamosmérnöki Kar

Electricity I. (KHXVT1ABNE)

Tantárgykód: KHXVT1ABNEKredit: 4
Angol cím: Electricity I.
Óbudai Egyetem
Kandó Kálmán Villamosmérnöki Kar
Híradástechnikai Intézet
Heti óraszámElmélet: 3
Gyakorlat: 0Labormérés: 0
Tárgy teljesítésének feltétele: Examination grade
Oktatási cél:Aims: This course provides knowledge necessary to learn all the calculation methods of DC and AC networks. These are compulsory knowledge for all electrical engineers The topics below show how important this course for the further studies of electrical engineer subjects.
A tananyag:Basics of Electricity (current, voltage, resistance, power).
Analysing methods of DC networks.
Non-linear DC networks.
Sinusoidal signals.
Analysing methods of AC networks.
Three phases systems.
Nyquist plots.
Lecture témaköreHétÓra
Terminology. Ideal basic element, Ohm’s law, conductive item, calculation the resistance and conductance of a wire, symbols, the directions of voltage and current. Electrical work and power. Overall resistance of resistive circuit – resistors connected serial or/and parallel. Delta-to-Wye and Wye-to-Delta transformation.13
Complex DC networks, Kirchhoff’s laws. Real generators (Thévenin and Norton). Source transformations. Thévenin and Norton equivalency, Millman’s theorem. Voltage and current dividers.23
Measuring voltage, current and resistance. Superposition, compensation, reciprocity. Maximum power transformation and efficiency.33
Methods for circuit simplification. Total network analysis. Mesh-current method.43
Node-voltage method. Mock test.53
DC circuits with nonlinear elements.
Analysing nonlinear circuits using graphical characteristics to find DC operating point. Dividing the nonlinear circuit to linear and nonlinear parts.
Big test I.73
Basic concepts of electrostatic fields.
Engineering units and SI. Scalar and vector quantities of the electrostatic fields. Electric flux density, Gauss’s law of electrostatic field.
Basic concepts of electrostatic fields.
Capacity, capacitance, electric field inside insulation, layered insulations. Capacity of coax cables. Energy of the electric field.
Magnetic field and magnetic circuits.
Basic concepts of stationary magnetic field, magnetic induction (B), representation of magnetic vector field using field lines introduced by Faraday, permanent bar magnet. Magnetic field of current-carrying wire and solenoid, Ampere’s circuital law, calculation of magnetic field strength (H) for toroid, solenoid and a pair of current-carrying wire. Magnetic permeability; dia-, para- and ferromagnetic materials.
Magnetic hysteresis, hard and soft magnets.
Magnetic field and magnetic circuits.
Magnetic circuits, Hopkinson’s law, magnetic reluctance or magnetic resistance. Analogy between magnetic and electrical circuits.
Calculation of magnetic field strength and magnetic flux in magnetic circuits with one or two loops. Air gaps.
Faraday’s law of induction.
Calculation of inductance, self-inductance and mutual inductance. Energy density of magnetic fields, energy stored in an inductor.
Big test II.123
Sinusoidal signals.
Generating sinusoidal voltage.
The period, the angular frequency and the frequency; phase and phase difference; amplitude or peak, and effective value.
Ohm’s law for amplitudes and effective values of sinusoidal voltage and current.
Capacitive and inductive reactance. Symbolic calculation method: sinor, phasor, impedance, susceptance, admittance. Calculation of impedance and admittance in serial, parallel and mixed circuits.
Sinusoidal signals.
Complex calculations in simple circuits.
Calculation of complex power.
Absolute and effective values: form and crest factors.
Félévközi követelmények

- Two tests during the semester. In additional small test are written at the practice course. The practice mark is calculated from these. The requirement of the signature to reach the minimum of mark 2.

- Visiting the lectures is compulsory
- To pass the practice course

Vizsga módja

Type of exam:

- Written

Evaluation of the exam:

- A written exam from the subject of the whole semester. The written exam has two parts: theory (40 points) and practice (60 points). To pass students need to reach 15 points from the theory part and 60 points from the overall 120.

Kötelező irodalom:
Ajánlott irodalom: Dr. Zoltan Toth: Electricity I. e-bookNilsson & Riedel: Electric Circuits 9th Ed.
Utolsó módosítás: