POWER ELECTRONICS
EE-603
Credit: 4
Introduction:
Concept of power electronics, application of power electronics, uncontrolled converters,
advantages and disadvantages of power electronics converters, power electronics systems,
power diodes, power transistors, power MOSFETS, IGBT and GTO.
PNPN devices:
Thyristors, brief description of members of Thyristor family with symbol, V-I
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characteristics and applications. Two transistor model of SCR, SCR turn on methods,
switching characteristics, gate characteristics, ratings, SCR protection, series and parallel
operation, gate triggering circuits, different commutation techniques of SCR.
Phase controlled converters:
Principle of operation of single phase and three phase half wave, half controlled, full
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controlled converters with R, R-L and RLE loads, effects of free wheeling diodes and
source inductance on the performance of converters. External performance parameters of
converters, techniques of power factor improvement, single phase and three phase dual
converters.
DC-DC converters:
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Principle of operation, control strategies, step up choppers, types of choppers circuits based
on quadrant of operation, performance parameters, multiphase choppers and switching
mode regulators.
Inverters:
Definition, classification of inverters based on nature of input source, wave shape of output
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voltage, method of commutation & connections. Principle of operation of single phase and
three phase bridge inverter with R and R-L loads, performance parameters of inverters,
methods of voltage control and harmonic reduction of inverters. Brief idea of Resonant
Pulse inverters.
AC controllers:
Principle of on-off and phase control, single phase and three phase controllers with R and
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R-L loads.
Principle of operation of cycloconverters, circulating and non circulating mode of
operation, single phase to single phase step up and step down cycloconverters, three phase
to single phase Cycloconverters, three phase to three phase Cycloconvetter.
Applications:
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Speed control of AC and DC motors. HVDC transmission. Static circuit breaker, UPS,
static VAR controller.
Problems based on the topics to be solved in the tutorial classes
Text Books:
1. Power Electronics, M.D. Singh and K.B. Khanchandani, Tata Mc Graw Hill. 2007
2. Power Electronics, V.R. Moorthi, Oxford, 2005
3. Power Electronics, M.H. Rashid, PHI, 3rd Edition
4. Power Electronics, P.S. Bhimra, Khanna Publishers, 3rd Edition.
Reference Books:
1. Modern Power Electronics & AC drives, B.K. Bose, Prentice Hall
2. Power Electronics, Mohan,Undeland & Riobbins, Wiley India
3. Element of power Electronics, Phillip T Krein, Oxford, 2007
4. Power Electronics systems, J.P. Agarwal, Pearson Education, 2006
5. Power Electronics, M.S. Jamal Asgha, PHI, 2007
6. Analysis of Thyristor power conditioned motor, S.K. Pillai, University Press.
7. Power Electronics : Principles and applications, J.M. Jacob, Thomson