Power Electronics

Silicon controlled rectifier (SCR): two transistor analogy, static and dynamic characteristics; Turn-on and turn-off methods; triggering methods (R, RC and UJT); snubber circuit design; Static and dynamic characteristics of Power MOSFET and Power IGBT; Numerical problems

Single-phase half-wave controlled rectifiers with R and RL loads, with and without freewheeling diode; Single-phase fully controlled mid-point and bridge converters (R, RL, RLE); continuous/discontinuous conduction; effect of source inductance; semi-converter; dual converter; Three-phase half-wave, fully controlled and semi converters with R and RL loads; output voltage expressions; Numerical problems

Single-phase AC-AC power control by phase control with R and RL loads; Expression for rms output voltage; Single-phase step-down and step-up cycloconverters; Numerical problems

Operation of basic chopper; analysis of buck, boost and buck-boost converters in CCM and DCM; Output voltage equations using volt-sec balance in CCM and DCM; Output voltage ripple and inductor current ripple; control techniques; introduction to PWM control; Numerical problems

Single-phase half-bridge and full-bridge inverters with R and RL loads; phase displacement control; PWM with bipolar and unipolar voltage switching; Three-phase square wave inverters (120-degree and 180-degree conduction); sinusoidal PWM; current source inverter (CSI); Numerical problems