JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Power Electronics, Power Electronic Converters

Course Objectives:

• To understand various advanced power electronics devices.
• To describe the operation of multi-level inverters with switching strategies for high power applications.
• To comprehend the design of resonant converters and switched mode power supplies.

Course Outcomes

After completion of the course, students will be able to:

• Develop and analyze various converter topologies.
• Design AC or DC switched mode power supplies.

UNIT - I

MODERN POWER SEMICONDUCTOR DEVICES Modern power semiconductor devices – Insulated Gate Bipolar Transistor (IGBT) –MOSFET-MOS Turn off Thyristor (MTO) – Emitter Turn Off Thyristor (ETO) – Integrated Gate-Commutated Thyristor (IGCTs) – MOS- controlled thyristors (MCTs)– Power integrated circuits (PICs) – symbol, structure and equivalent circuit – comparison of their features. .

UNIT - II

RESONANT PULSE INVERTERS Resonant pulse inverters – series resonant inverters – series resonant inverters with unidirectional switches – series resonant inverters with bidirectional switches – analysis of half bridge resonant inverter – evaluation of currents and voltages of a simple resonant inverter – analysis of half bridge and full bridge resonant inverter with bidirectional switches – Frequency response of series resonant inverters – for series loaded inverter – for parallel loaded inverter – For series and parallel loaded inverters – parallel resonant inverters – Voltage control of resonant inverters – class E resonant inverter – class E resonant rectifier – evaluation of values of C’s and L’s for class E inverter and Class E rectifier – numerical problems.

UNIT - III

RESONANT CONVERTERS Resonant converters – zero current switching resonant converters – L type ZCS resonant converter – M type ZCS resonant converter – zero voltage switching resonant converters – comparison between ZCS and ZVS resonant converters – Two quadrant ZVS resonant converters – resonant dc-link inverters – evaluation of L and C for a zero current switching inverter – Numerical problems.

UNIT - IV

MULTILEVEL INVERTERS Multilevel concept – Classification of multilevel inverters – Diode clamped Multilevel inverter – principle of operation – main features – improved diode Clamped inverter – principle of operation – Flying capacitors multilevel inverter-principle of operation – main features – cascaded multilevel inverter – principle of operation – main features – Multilevel inverter applications – reactive power compensation – back to back intertie system – adjustable drives - Switching device currents – dc link capacitor voltage balancing – features of Multilevel inverters – comparisons of multilevel converters.

UNIT - V

D.C & A.C POWER SUPPLIES DC power supplies – classification - switched mode dc power supplies – fly back Converter – forward converter – push-pull converter – half bridge converter – Full bridge converter – Resonant d c power supplies – bidirectional power supplies – Applications. AC power supplies – classification – switched mode ac power supplies – Resonant AC power supplies – bidirectional ac power supplies – multistage conversions – control circuits – applications. Introduction – power line disturbances – power conditioners – Uninterruptible Power supplies – applications.

TEXTBOOKS:

• 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, “Pulse width Modulation for Power Electronic Converters” Dr., G. Narayanan, https://www.youtube.com/playlist?list=PLbMVogVj5nJQoZqyLxx-cg_dYE-Dt2UMH M. Tech – I Semester L T P C 3 0 0 3