Credits: 4. Grading scale: TH. Optional for: E4. Course coordinator: Per Karlsson, Sabine Marksell, Tomas Bergh, Inst f ind elektrotekn o aut. Recommended prerequisites: ESS020 Analogue Cicuits and ESS060 Electrical Engineering. Assessment: Completed simulations and laboratory project, presented both in written and oral reports, equals ECTS grade E or D. For a higher grade, a written examination is also required. Further information: The course might be given in English. Homepage: http://www.iea.lth.se/courses.

Aim
The aim of the course is to give an orientation in the properties and use of modern components presently used for the realisation of power electronic converters, like rectifiers, switch mode power supplies, invertors for motor control and converters for high voltage DC (HVDC) transmission. The project work aims to provide working experience of the simulation, measurement and evaluation of power electronic circuits.

Contents

• Lectures: Switch mode power supplies, principle of forward and flyback operation. Rectifiers and inverters. Modulation and control of power electronic converters. Loss-estimation and cooling. Diodes, bipolar power transistors, field effect transistors (MOSFET), insulated gate bipolar transistors (IGBT), thyristors, MOS-controlled thyristors (MCT), gate commutated turn-off thyristors (GCT) and passive components used in power electronic circuits. For each component, the properties, limitations, drive and protective circuitry, are discussed.

• Simulations: Analysis of the components and parts of the switch mode power supply and four quadrant DC-DC converter later examined in the laboratory. The simulation program used is a commercially available power electronics simulation package.

• Laboratory work: Measurements and validation of the operation of a switch mode power supply and a four quadrant DC-DC converter.

• Project: Evaluation of simulation and measurements results. Written and oral report.

Literature
Compendium: Power Electronics, Industriell elektroteknik och automation IEA/LTH, 2003.