About the book:
This book, written
by the author following his decades of research experience of dealing with
eddy-current problems and their analyses, aims at a comprehensive study of
various aspects of eddy currents, from a detailed account of the basic
phenomenon to their utilisation in various applications, and their detrimental
effects, esp. in large turbogenerators.
The first part of
the book describes in detail the theory and principles involved in the genesis
of eddy currents, based on Maxwell's equations. There is a chapter describing
applications of eddy currents in various forms. Later, an extensive description
is given of eddy current power loss, heating and temperature rise in key
regions of machines that may be detrimental to their operation and performance
under steadystate and transient operating conditions, causing severe thermal
stress and damage, esp. in to turbogenerators.
The second part is
devoted to the “basics” of finite elements and formulation of the methodology
relevant to the solution of eddy-current problems in general, with special
reference to requirements for finite-element solution of eddy-current problems.
The technique is applied to a few representative problems to illustrate the
various key aspects of FEM.
In the third part,
the technique is first applied to solve eddy-current problems related to an
actual 2-pole turbogenerator. A case of particular importance, discussed in
detail, is the significant effects of eddy currents in large turbo-generators
during their unbalanced operation, leading to heating and temperature rise as a
result of eddy-current power loss that can be unacceptably intense in some key
parts. This is followed by two chapters related to a “model turbogenerator”,
uniquely conceptualised and designed by the author during the course of
experimental research, not easily feasible on actual generators. An important
and unique feature of the model turbogenerator would be its very extensive and
special instrumentation, employing a variety of hundreds of transducers to
measure electromagnetic-field parameters and temperature rise due to
eddy-current power loss.
Later, a chapter is
specifically devoted to the case study of two large turbogenerators, each of
500 MW rating, manufactured by two different world-class manufacturers, to substantiate
the methodology of analysis developed by the author.
The salient feature
of the book, one of its kind available anywhere, is the detailed description of
the finite-element technique(s) for analyses of the steadystate and transient
heating of key regions of turbogenerators of ratings from 120 MW to 500 MW when
exposed to “negative-sequence” currents under unbalanced fault conditions.
The book is enriched by
over a dozen appendices, dealing with special aspects pertaining to various
chapters, to substantiate their contents. An elaborate list of symbols, a very
comprehensive list of references (not easily available elsewhere) and
bibliography related to eddy currents and finite elements and a detailed index
form important assets of the book. |
About the Author: Dr. S C Bhargava's professional career spans over five
decades of which he spent 25 years, engaged in industrial research at Corporate
R & D of BHEL, Hyderabad, from where he retired as Specialist
(Electromagnetic Phenomena) in 1999.
He has published
over 50 research/technical papers in various National and International
Journals, many of the papers having been first presented at conferences. His
current field of research is “Biomedical Effects of Electromagnetic Fields on
Living Beings” on which he has published and co-authored several papers.
He is a (Life)
Fellow of IE(I), IEE(UK), IETE and Senior Member of CSI. He is also the Life
Senior of the IEEE with which he has been very actively associated since 1980s,
having been the Chairman of the IEEE Hyderabad Section in 1991 and 1992.
His latest interest is
designing and development of solar electric modules and systems in which he has
been actively engaged for the past six years. |
