EG3EP Power converters V: 2+1+0 VI: 2+2+0

Introduction to power converter principles. Commutation process theory. Natural and forced commutation. Principles of phase control, AC voltage controllers. Single phase bi-directional AC controllers with resistive, inductive and RL loads. Three phase half-wave and full-wave AC controllers. Phase controlled rectifier converters. Single phase and tree-phase half-wave and full-wave converters. Dual converters. Power factor improvements. Choppers, principle of step-down and step-up operation. Impulse-commutated thyristor choppers. Resonant pulse choppers. Chopper circuit design. Forced-commutated and complementary-commutated inverters. Single, multiple and sinusoidal pulse-width modulation. Current- source inverters, series resonant inverters. Harmonic reductions. Power converters in DC and AC drives.

EG3SAU Automatic control systems V: 2+2+0 VI: 2+2+0

EG3TMJ Transformers and DC powered machines V: 2+1+0 VI: 2+2+0

TRANSFORMERS OPERATING PRINCIPLES. Main expressions (equations). TRANSFORMER AT NO-LOAD. Magnetic circuit. Magnetizing current and magnetizing impedance. Iron losses. TRANSFORMER UNDER LOAD. The ideal transformer; sinusoidal voltage, referred values of impedances. The real transformer and its equivalent circuit. The leakage reactance. No-load and chort-circuit tests. Load losses and skin effect. Efficiency. Voltage regulation and per-unit values. THERMAL PROBLEMS. Load and rated power. Cooling types. Temperature distribution. Non-stationary thermal processes. TRANSIENT STATES. Connecting the transformer to the mains. Sudden short circuit, mechanical forces. Overvoltages and measures taken to overcome their effects. THREE-PHASE TRANSFORMERS. Wye, delta and zig-zag connections. Parallel operation. Asymmetric conditions, equivalent circuits, zero-sequence components and their effects. DESIGN OF TRANSFORMERS. Determination of basic dimensions, calculation of main characteristics, thermal evaluation. SPECIAL TYPES OF TRANSFORMERS. Number-of-phases converters. Three-winding transformers. Autotransformers. Tap-changing transformers. Transformer for static converters. Buffer transformers. Transformer for broad range of frequencies. CHOKES AND REACTORS. Application, design, calculating principles. SUPERVISION (SERVICE), PREVENTIVE (PRE-EMPTIVE) MEASURES, PROTECTION. Measures. Maintenance. Detection and signalization of faults. * DIRECT CURRENT (D-C) MACHINES DEVELOPMENT AND PROSPECT. The elementary d-c mechine. Operating principle. MAIN CONSTRUCTION PARTS. Generator and motor operation. ARMATURE WINDINGS. Definition, types, emfs' polygon. Equations for emf's and torque. ARMATURE REACTION AND ITS SUPRESSION. COMMUTATION AND MEASURE FOR ITS IMPROVEMENT. POWER LOSSES. Efficiency. Heating and cooling. GENERATORS. Types, characteristics, calculating of excitation, parallel operation. MOTORS. Types, characteristics, speed variation, braking, reversal. SPECIAL TYPES OF D-C MACHINES. Drill sessions with solving numerical examples on the blackboard.

EG3E Electromagnetics V: 2+1+0

EG3EPE Electromechanical conversions of energy V: 2+1+0

EG3ME Measurements in power electronics V: 2+0+3

EG3OMT Fundamentals of machinery and thermotechnics V: 3+2+0

EG3T Telecommunications V: 3+1+0

Foundations, basic terminology and concepts of telecommunications technologies. Basic aspects of communication technologies and society intersections. Model of communications systems. Introduction to information theory and coding. Signals and spectra. Characteristics of real signals. Random noise. Basic analog communication techniques and systems. Frequency division multiplex/multiple access. Sampling process. A/D conversion and source coding. Time division multiplex/multiple access. Digital transmission systems hierarchy. Baseband digital modulation. Digital transmission through bandlimited channels. Digital coherent and noncoherent bandpass modulation techniques. Spread spectrum techniques. Powerline communication systems. Communication signals transmission in long distance powerline systems. Transmission of communication signals through fibre lines associated with long distance powerline systems. Low voltage powerlines as telecommunications access networks. Overview of contemporary communication systems.

EG3EES Power engineering systems components VI: 2+2+0

Generally about Power systems. Possible technical methods for electric energy transmission. Basic data of power system of Serbia. Mechanical designing of overhead (transmission) power lines: Conductors, insulators, State equatin of conductors, sag, critical span and temperature. Electrical parameters of power lines: Resistance, inductances, zero sequence inductance and capacitances of transmissing lines. Simetrical steady states and equivalent "P" scheme. Power transformer: Characteristic sites of transformers in power network. Single and threephase transformer and it's parameters. Autotransformers. Scalar and complex transformation ratio. Zero sequence transformer parameters. Synchronous generator: Non-Salient (turbo) and Salient-Pole generators. Generator parameters for symetrical and unsymetrical operations. Angle characteristics of a synchronous machine. Operating diagrams of a salient and non-salient generators.

EG3EIO Electical instalations and lighting VI: 3+2+0

Fundamentals of light. Lamps. Luminaires. Interior lighting design. Principal characteristics of most frequently used electrical loads. Power-factor correction. Most frequently used electrical components (cables, switches, fuses, bimetal relays, circuit-breakers, timers). Planning and design of electrical installations in buildings. Grounding systems. Protective measures against electric shock (protective measures against direct and indirect contact). Voltage drop. Determining the connected load (utilization and coincidence factors). Lightning protection (design and equipment). RTV and telephone electrical installations.

EG3EMN AC powered machines VI: 3+2+0