JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Power Electronics

Course Objectives

to prepare the students to

• understand the principle of operation of modern power semiconductor devices.
• comprehend the concepts of different power converters and their applications
• analyze and design switched mode regulators for various industrial applications.

Course Outcomes

At the end of the course, the student is able to:

• Choose appropriate device for a particular converter topology.
• Use power electronic simulation packages for analyzing and designing power converters.

UNIT - I

AC VOLTAGE CONTROLLERS Single phase AC voltage controllers with Resistive, Resistive-inductive and Resistive-inductive-induced e.m.f. loads – ac voltage controllers with PWM Control – Effects of source and load inductances - Synchronous tap changers. Three phase AC voltage controllers – Analysis of controllers with star and delta Connected Resistive, Resistive-inductive loads – Effects of source and load Inductances – Applications & Problems.

UNIT - II

CYCLO-CONVERTERS Single phase to single phase cyclo-converters – analysis of midpoint and bridge Configurations – Three phase to three phase cyclo-converters –analysis of Midpoint and bridge configurations – Limitations – Advantages – Applications & Problems - Matrix Converter.

UNIT - III

SINGLE PHASE & THREE PHASE CONVERTERS Single phase converters – Half controlled and Fully controlled converters – Evaluation of input power factor and harmonic factor – continuous and Discontinuous load current – single phase dual converters – power factor Improvements Techniques– Extinction angle control – symmetrical angle control, PWM – single phase sinusoidal PWM – single phase series converters – overlap analysis – Applications & Problems. Three phase converters – Half controlled and fully controlled converters – Evaluation of input power factor and harmonic factor – continuous and Discontinuous load current – three phase dual converters – power factor Improvements Techniques– three phase PWM - twelve pulse converters – Applications – Problems – Design of converters.

UNIT - IV

D.C. TO D.C. CONVERTERS Analysis of step-down and step-up dc to dc converters with Resistive and Resistive-inductive loads – Switched mode regulators – Analysis of Buck Regulators - Boost regulators – buck and boost regulators – Cuk regulators – Condition for continuous inductor current and capacitor voltage – comparison of regulators –Multi output boost converters – advantages – Applications – Problems.

UNIT - V

PULSE WIDTH MODULATED INVERTERS

R19 M.TECH M. TECH. PE/PEED

Principle of operation – performance parameters – single phase bridge inverter- evaluation of output voltage and current with resistive, inductive and Capacitive loads– Voltage control of single phase inverters – single PWM – Multiple PWM – sinusoidal PWM – modified PWM – phase displacement Control – Advanced modulation techniques for improved performance – Trapezoidal, staircase, stepped, harmonic injection and delta modulation – Advantages – Applications & Problems.

Three phase inverters – analysis of 180 degree conduction for output voltage And current with resistive, inductive loads – analysis of 120 degree Conduction – voltage control of three phase inverters – sinusoidal PWM – Third Harmonic PWM – 60 degree PWM – space vector modulation – Comparison of PWM techniques – harmonic reductions – Problems.

TEXT BOOKS:

• 1. Mohammed H. Rashid “Power Electronics” Pearson Education Third Edition – First Indian reprint 2004.
• 2. Ned Mohan, Tore M. Undeland and William P. Robbins, “Power Electronics” - John Wiley & Sons – Second Edition.

REFERENCES:

• 1. Milliman Shepherd and Lizang – “Power converters circuits” – Chapter 14 (Matrix converter) PP- 415-444,
• 2. M.H.Rashid - Power electronics hand book –
• 3. Marian P. Kaźmierkowski, Ramu Krishnan, Frede Blabjerg Edition:” Control in power electronics” illustrated Published by Academic Press, 2002.
• 4. NPTEL online course, Power Electronics, by Prof. B. G. Fernandez, https://www.youtube.com/playlist?list=PLA07ACBDE053A8229 R19 M.TECH M. TECH. PE/PEED M. TECH – I YEAR – I SEM. (PE/PEED)