Course108101126124 lectures
Fundamental of Power Electronics
Prof. L.Umanand · IISc Bangalore
Lectures
WEEK 1 - DIODE
- Ideal Switch
- Diode static characteristics
- Dynamic characteristics
- Power loss and its estimation
- Thermal aspect
- Diode datasheet examples
- Heatsink datasheet example
- Getting started in circuit simulation
- Schematic capture with KiCAD - intro
WEEK 2 - BIPOLAR JUNCTION TRANSISTOR
- BJT intro
- Static - Collector curves
- Static - Base curves
- Dynamic Characteristics
- Loss calculation
- Parallel Operation
- Darlington Connection
- BJT datasheet examples
- Spice simulation
WEEK 3 - MOSFETs and IGBTs
- MOSFET intro and static characteristics
- Transconductance and body diode
- MOSFET dynamic characteristics
- Sample datasheet of MOSFET
- IGBT introduction
- Thyristor family
- Comparison of switches
- Simulation - MOSFET curves
WEEK 4 RECTIFIER CAPACITOR FILTER
- Motivation for rectifier capacitor filter
- Circuit Operation
- Designing the circuit
- KiCAD - Simulation of circuit
- KiCAD - Symbol Library and Models
- Simulation setup for NgSpice and gEDA schematic capture
- Simulating the circuit
- Practicals
WEEK 5 PROTECTION and POWER FACTOR
- Inrush current limiting - intro
- Inrush current limiting - Resistor solution
- Inrush current limiting - Thermistor solution
- Inrush current limiting - Transformer solution
- Inrush current limiting - MOSFET solution
- Inrush current limiting - Relay, contactor
- Three phase rectifier capacitor filter
- KiCAD - simulation of 3 phase rectifier filter
- gEDA - 3 phase rectifier capacitor filter
- Power factor - motivation
- Power factor - discussion
- Power factor - sinusoidal
- Power factor for rectifier cap filter
- Passive power improvement circuit
- KiCAD - simulation of passive PF improvement
- gEDA - simulation of passive PF improvement
WEEK 6 - DC-DC LINEAR
- Linear regulators - intro
- Shunt regulator
- Example on shunt regulator
- Non-ideality and solution
- Applications of shunt regulator
- Series regulator
- Efficiency of series
- Negative and dual voltage regulators
- Over current limiting circuits
- Improvements to series regulator
- Regulator performance parameters
- Datasheet of few IC regulators
- Common IC regulator circuits
- Practicals 1
WEEK 7 - DC-DC SWITCHED CONVERTERS
- Switched mode DC-DC converter intro
- Volt-sec and Amp-sec balance
- Input-output relationship
- Buck converter - operation and waveforms
- Buck converter - component selection
- Primary configurations
- Boost converter
- Buck-Boost converter
- Simulating the primary converters
- Simulation using KiCAD schematic entry
WEEK 08 - DC-DC FORWARD AND FLYBACK
- Forward converter
- Core reset in forward converter
- Simulating with lossy core reset
- Simulating with lossless core reset
- Flyback converter
- Simulating the flyback converter
- Octave mfile for design
WEEK 09 - Inductor and Transformer Magnetic design
- Magnetics design intro
- Magnetics review
- Permeance
- Inductor value and energy storage
- Inductor area product
- Inductor design
- Inductor example
- Transformer design
- Transformer example
- Forward converter design mfile
WEEK 10 Pushpull, halfbridge and fullbridge
- Pushpull converter
- Flux walking in pushpull
- PWM generation
- Simulation of pushpull converter
- Half bridge converter
- Simulation of halfbridge converter
- Full bridge converter
- Simulation of fullbridge converter
- Area products and mfiles
WEEK11 - BJT and MOSFET Drive Circuits
- Intro for drive circuits
- BJT base drive
- BJT base drive example
- Multi-stage base drive
- Base drive with speed-up circuit
- Base drive with isolation
- MOSFET gate drive
- MOSFET drive with isolation
- Over-current protection
- Snubber circuits
WEEK12 - Close loop control
- Intro for close loop control
- Close looping dc-dc converters
- Simulation of close loop control
- Current control for battery charger application
- Instability in current control and slope compensation
- Slope compensated current control
- Simulation of current control
- Single phase inverter with sinusoidal pwm
- Simulation of sinusoidal PWM
Live Session
Syllabus and materials
At NPTEL, as the course publishes them.
Credits and licence
- Institution
- IISc Bangalore
- Department
- Electrical Engineering
- Teacher
- Prof. L.Umanand
- Level
- Undergraduate
- Language
- English
- Subjects
- Engineering
- Source
- NPTEL
- Licence
- CC BY-NC-SA, as NPTEL states it. Non-commercial use only. NPTEL's terms
- Attribution
- NPTEL states: "Distributed under Creative Commons Attribution-ShareAlike / CC BY - NC - SA", beside a BY-NC-SA badge.
- Who can watch
- NPTEL gives no rating. Invisible Network shows it to Tweens profiles and older, judged from what the source says about it. How courses are placed
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