Power Electronics
Power Diode
Reverse recovery characteristics, Schottky diodes.
Thyristor (SCR)
Two-transistor analogy, latching/holding current.
SCR Protection
Snubber circuits, di/dt, dv/dt protection.
SCR Triggering
R, RC, UJT triggering circuits.
TRIAC and DIAC
Bidirectional control, dimmer applications.
Power MOSFET
VDMOS structure, safe operating area.
IGBT
Insulated Gate Bipolar Transistor structure, tail current.
GTO
Gate Turn-Off thyristor.
Wide Bandgap Devices
SiC and GaN, benefits over Silicon.
Uncontrolled Rectifiers
Half/Full wave diode rectifiers, R/RL loads.
Freewheeling Diode
Effect on waveform, energy recovery.
Phase Controlled Rectifiers
Single phase half/full converters.
Semi-Converters
Asymmetrical control, power factor improvement.
Three Phase Rectifiers
3-pulse and 6-pulse converters.
Cycloconverters
Step-up and step-down frequency conversion.
Matrix Converters
Direct AC-AC conversion basics.
DC-DC Converter Basics
Duty cycle, voltage transformation.
Buck Converter
Step-down converter analysis, continuous/discontinuous mode.
Boost Converter
Step-up converter analysis.
Cuk Converter
Capacitive energy transfer.
Multiphase Choppers
Ripple reduction techniques.
Three Phase Inverters
180 degree and 120 degree conduction modes.
PWM Techniques
Sinusoidal PWM, harmonic reduction.
Space Vector Modulation
Concept of reference vector synthesis.
Current Source Inverters
Auto-sequential commutated inverter.
Multilevel Inverters
NPC, Cascaded H-bridge overview.
Introduction to SMPS
Linear vs Switching supplies, efficiency.
Flyback Converter
Isolated buck-boost derived topology, transformer.
Forward Converter
Isolated buck derived topology, tertiary winding.
Push-Pull Converter
Transformer utilitization, center-tap.
Half and Full Bridge SMPS
High power applications.
Resonant Converters
ZVS, ZCS switching.
DC Motor Drives
Speed control using controlled rectifiers and choppers.
Braking of DC Motors
Regenerative, Dynamic, Plugging.
Induction Motor Drives
Stator voltage control, V/f control.
Vector Control
Field Oriented Control (FOC) basics.
BLDC Motor Drives
Brushless DC motor operation and commutation.
Stepper Motor Drives
Unipolar vs Bipolar drive.
HVDC Transmission
Basic principle of high voltage DO transmission.
FACTS Devices
Flexible AC Transmission Systems overview.
UPS Systems
Online, Offline, Line-interactive.
Harmonics in Power Systems
THD, filters.
Dual Converters
Four quadrant operation.
Source Inductance Effect
Commutation overlap, voltage drop.
Buck-Boost Converter
Inverting topology.
Chopper Control Strategies
PWM vs Frequency Modulation.
Voltage Source Inverters
1-phase half/full bridge.
AC Voltage Controllers
On-off control, phase control with TRIAC.