Currents changing in time. Alternating and sinusoidal currents. Basic effects of alternating currents. Average and RMS values. Connecting R, L and C on an AC voltage. Power and voltage relations in AC circuits. Phasor representation. Impedance and admittance, complex power. Methods for solving electrical networks: direct usage of the Kirchhoffov' laws, the method of node voltages, the method of loop currents, the method of superposition. Thevenin's theorem, Norton's theorem and Millman's theorem. Compensation of the reactive power. Resonance. Q factor and frequency characteristic. Multiphase currents. Three-phase system. Delta and wye connected load. Power of the three-phase system. Inductances and transformer. Total inductance of mutual coils. Coreless transformer - equation and scheme. Transformer with iron core.

Knowledge and skills acquired

Students will acquire knowledge of phasors, linear DC and AC circuits solving, complex power calculation, calculation of the compensation and resonance, current, voltage and power calculation in three-phase networks as well as the basic knowledge of tranformers.

Teaching methods

Lectures (3 hours per week), auditory exercises (2 hours per week) and laboratory exercises (15 hours per semester).

Student requirements

Defined by the Student evaluation criteria of the Faculty of Electrical Engineering, Computer Science and Information Technology Osijek and paragraph 1.9

Monitoring of students

Defined by the Student evaluation criteria of the Faculty of Electrical Engineering, Computer Science and Information Technology Osijek and paragraph 1.9

Student assessment

Revision exam in lectures, auditory exercises revision exams, laboratory exercises revision exam, written and oral exam.

Obligatory literature

1. 1 Kuzmanović, B. Osnove elektrotehnike II. Zagreb: Element, 2000.

2. 2 Alexander, Charles K; Sadiku, Matthew N.O. Fundamentals of Electric Circuits McGraw Hill Higher Education, 2009.

3. 3 Felja, Koračin, Malić Zbirka zadataka i rješenih primjera iz Osnova elektrotehnike, I. i II. dio 1991

4. 4 Hederić, željko; Barukčić, Marinko Osnove elektrotehnike II. Priručnik za laboratorijske vježbe interna skripta ETF, Osijek, 2010.

Pretraži literaturu na:

1. 1 B. Kuzmanović Zbirka zadataka i pitanja iz Osnova elektrotehnike 1 Element, Zagreb, 2010.

2. 2 J. Edminister Electric Circuits Schaums Outline Series, McGraw-Hill Book Company, 1983.

3. 3 U.A.Bakshi, V.U.Bakshi Basic Electrical Engineering Technical Publications, 2009.

Written or revision exams and oral exam.

Course assessment

Conducting university questionnaires on teachers (student-teacher relationship, transparency of assessment criteria, motivation for teaching, teaching clarity, etc.). Conducting Faculty surveys on courses (upon passing the exam, student self-assessment of the adopted learning outcomes and student workload in relation to the number of ECTS credits allocated to activities and courses as a whole).

Overview of course assesment

1. define basic electrical quantities and terms of equivalent circuit (current, voltage, power, active and passive elements, impedance, admittance, resistance, inductance, capacitance, mutual inductance)

2. choose appropriate mathematical models of basic physical elements of a real AC electrical circuit

3. propose models of electrical AC circuits containing linear elements in steady state

4. compare methods for solving electrical AC circuits containing linear elements in steady state

5. numerically and analytically solve the mathematical models of AC circuits containing linear elements in a steady state using a phasor transformation

6. connect a real AC circuit

7. validate measurement results of basic electrical quantities in AC circuits

Aktivnosti studenta: