Unit 1 Characteristics of Semiconductor Power Devices

12 lecture hours

• power MOSFET and IGBT- Treatment should consist of structure
• protections and thermal considerations
• Brief introduction to power devices viz
• MOS controlled thyristor (MCT)
• Power Integrated Circuit (PIC) (Smart Power)
• commutation and snubber circuits for thyristor
• power MOSFETs and IGBTs (discrete and IC based).Concept of fast recovery and schottky diodes as freewheeling and feedback diode

Unit 2 Controlled Rectifiers

10 lecture hours

• Single phase: Study of semi and full bridge converters for R, RL, RLE and level loads
• Analysis of load voltage and input current- Derivations of load form factor and ripple factor
• Effect of source impedance
• Input current Fourier series analysis of input current to derive input supply power factor
• displacement factor and harmonic factor

Unit 3 Choppers

10 lecture hours

• Principle of chopper operation
• control strategies
• Analysis of Step-Up
• Step-down and Step-Up/Down chopper
• Quadrant operations of Type A, Type B, Type C, Type D and type E choppers
• Control techniques for choppers – TRC and CLC, Detailed analysis of Type A chopper
• Step up chopper
• Multiphase Choppers

Unit 4 Single-phase inverters

10 lecture hours

• Principle of operation of full bridge square wave
• quasi- square wave
• PWM inverters and comparison of their performance
• Driver circuits for above inverters and mathematical analysis of output (Fourier series) voltage and harmonic control at output of inverter (Fourier analysis of output voltage)
• Filters at the output of inverters
• Single phase current source inverter

Unit 5 Switching Power Supplies

9 lecture hours

• Analysis of fly back
• forward converters for SMPS
• Resonant converters - need
• concept of soft switching
• switching trajectory and SOAR
• Load resonant converter - series loaded half bridge DC-DC converter

Unit 6 Applications

• Power line disturbances
• power conditioners
• Block diagram and configuration of UPS, salient features of UPS, selection of battery and charger ratings
• sizing of UPS
• Separately excited DC motor drive
• P M Stepper motor Drive.
• DC Chopper drives
• Speed control of Induction Motors. cooling and thermal 08 This syllabus is mapped with following United Nation’s Sustainable Development Goals: SDG 3 - Good Health and Well-being Program Name: Bachelor of Engineering Level: UG Branch: Electronics and Communication Subject Code: BE05000391 Subject Name: Power Electronics SDG 4 - Quality Education
• SDG 7 – Clean and affordable energy
• SDG 8 - Decent Work and Economic Growth
• SDG 9 - Industry
• Innovation and Infrastructure
• SDG 11 - Sustainable Cities and Communities
• SDG 12 - Responsible Consumption and Production
• SDG 13 -Climate Action Relevant BIS standards: IS 616 – Safety of Electrical Appliances IS/IEC 60950-1 – IT Equipment Safety IS 325 – Three Phase Induction Motors IS 4722 – Rotating Electrical Machines IS 8789 – Semiconductor Converters IS 16221 (Part 1 & 2) – Safety of Power Converters for PV Systems IS 16169 – Grid Connected PV Inverter Requirements IS 14286 – Solar Photovoltaic Modules Also explore other relevant Indian and international standards