Power Electronics And Electrical Drives 2017/2018

POWER SEMICONDUCTORS  

Power Semiconductors employed in Power Electronics converters:  Diodes, BJT, MOSFET, IGBT, Thyristors, Wide Bandgap Semiconductors).

Static and dynamic behavior. Thermal behavior. Conduction and switching losses.

Technical specifications provided by manufacturers’ datasheets. Driving circuits.

POWER CONVERTER TOPOLOGIES  

Behavioral characteristics: unidirectional and bidirectional energy transfer, controlled voltage sources.  Analysis method of power converters.

DC-DC Converters. Buck, Boost, Buck-Boost. Switching losses reduction. Average Model. Modulation techniques (PWM, PFM, PRM). Output voltage open-loop control.  Closed-loop control.  Current control.Half and Full Bridge DC-DC converters.

DC-AC Converters (Inverters).Half and Full Bridge DC-AC single-phase converters based on static switches. Three-phase converters. Modulation techniques. Selective Harmonic Elimination (SHE). Sinusoidal Pulse Width Modulation (SPWM).

Single-phase and three-phase force-commutated PWM rectifiers: topologies, voltage and current controls. Power Factor Corrector (PFC). Effects on grid side of power converters. Generalized power factor. Compliance with grid codes.

Isolated DC-DC converter.

Electrical Drives

Overview of Electrical Drives. DC, Permanent Magnet Synchronous Motors and Induction Motors.

DC motors Model. Closed-loop control of DC motors.

Power Converters and Drives simulation using Matlab-Simulink/Simpowersystem.