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2.single phase half bridge and full bridge inverters-VSI:voltage control of inverters single,multi pulse ****
3.Characteristics of IGBT (static and dynamic behavior)***
UNIT-3
2Capacitor filter for low power rectifiers-Lc
3.Power diode-half wave rectifier
2. -resonant converters-switching loss calculations and thermal design
*These questions are expected for the exams This may or may not be asked for exams .
** These questions are expected as problems in part-C
SYLLABUS
Unit 1
SWITCHING POWER SUPPLIES
Mosfet dynamic behavior-driver and snubber circuits-low power high switching frequency switching power supplies,buck ,boost,buck-boost converters-isolated topologies-resonant converters-switching loss calculations and thermal design
UNIT 2
INVERTERS
IGBT:Static and dynamic behaviour-single phase half bridge and full bridge inverters-VSI:(1 phase and three phase inverters square wave operation)-voltage control of inverters single,multi pulse , sinusoidal,space vector modulation techniques-various harmonic elimination techniques-CSI
UNIT 3
UNCONTROLLED RECTIFIERS
Power diode-half wave rectifier -mid-point secondary transformer based full wave rectifier -bridge rectifier -voltage doubler circuit-distortion factor-capacitor filter for low power rectifiers-Lc filters -concern for power quality-three phase diode bridge
Unit 4
CONTROLLED RECTIFIERS
SCR-Two transistor analog based turn-on -turn on losses-thermal protection-controlled converters(1 pulse,2 pulse,3 pulse,6 pulse)-displacement factor-ripple and harmonic factor-power factor mitigation,performance parameters -effect of source inductance-inverter angle limit
UNIT 5
AC PHASE CONTROLLERS
TRIAC triggering concept with positive and negative gate pulse triggering,TRIAC based phase controllers-various configurations for SCR based single and three phase controllers