“The Key Milestones in the Evolution of Induction Motor Drives”
Victor Stefanovic, Consultant
Afton, Virginia, USA
The field of Induction Motor Drives has experienced a tremendous development over the last several decades. From essentially constant speed operation, it evolved into a flexible system, having adjustable speed, torque and even position control. With a continuous improvement in reliability and with a reduced cost, this drive technology is now also expanding into high volume consumer applications, such as automotive and household appliances.
This panel reviews the key advancements that are enabling the success of the Induction Motor Drive technology, examining the advancements in each of its constituent fields: the induction motor, the adjustable frequency/voltage converter and the control. The current state of technology is presented for each of these fields and the future trends are outlined. /span>
10 minutes introductory presentation by the panel organizer, followed by 20 minutes per each of three presentations; the remaining time for discussion at the end.
“Induction motors and generators evolution”
"Development of converter systems for Adjustable Speed Drives"
“Evolution in motor control: From const. V/Hz to field orientation”
Victor (Vojislav) Stefanovic has over 50 years experience in adjustable speed drives and power electronics. Prior to 1981, he was a University Professor, in Canada and then in the USA. Since 1981, he held a variety of application, design and administrative positions in industry in the U.S. and Europe, being responsible for drive engineering and product development, with applications to industrial processes, material handling, machine tools and robotics. His last full time industry position was with Vickers, where he was the Director of Drives Division, located in Europe. He is now a consultant, working in R & D planning and product development in the field of adjustable speed drives.
Mr. Stefanovic was graduated from the University of Beograd, and obtained his MSEE and Ph.D degrees from McGill University in Montreal, Canada.
He has taught courses in power electronics, drives and electric machines at universities in Canada, the U.S.A, Italy and South Korea.
He was made a Fellow of the IEEE in 1991 "for contribution to the development and practice of adjustable speed drives and static power converters".
Prof. Ion Boldea
Professor, IEEE Life Fellow
University Politehnica of Timisoara
Ion Boldea is an IEEE member since 1977, an IEEE Fellow since 1996, and Life Fellow since 2011. He received his M.S. and Ph.D. degrees in 1967 and 1973, respectively, from the University Politehnica of Timisoara, Romania, where he is a Full Professor. He spent about 5 years in all as Visiting Professor in Electrical Engineering in the USA (in Kentucky and Oregon) since 1973, when he was a Senior Fullbright Scholar for 10 months. He was a Visiting Professor in the UK at UMIST and Glasgow University for a few times. Prof. I. Boldea is a full member of Romanian Academy of Technical Sciences (1999), a full member of the “European Academy of Sciences and Arts” in Salzburg, Austria (2004)and a correspondent member of the Romanian Academy; Prof. I. Boldea is a Honorary citizen of his hometown, Lugoj, in Romania.
He received four IEEE-IA paper prizes (two IAS Committees (EMC and IDC) conference paper prizes and two IA-Trans. Prize) in 1996, 1997, 1998, and 2004.
Prof. I. Boldea is a member of IEEE-IAS IDC and EMC committees since 1992, IEEE-PELS Nominations Committee Member for 2013-2015, Associate Editor of the EPCS Journal (published by Taylor and Francis) since 1977, director and founder in 2001 of the Internet-only International "Journal of Electrical Engineering" -
www.jee.ro and General Chairman of the International Conference OPTIM-1996, 1998, 2000, 2002, 2004, 2006, 2008, 2010 (www.info-optim.ro) technically sponsored by IEEE-IAS/IES/PES, IEEEXplore and ISI. Prof. Boldea has been consulting, lecturing, giving keynote addresses and holding intensive courses in the USA, Europe and Asia for the last 25 years .He has been an IEEE-IAS Distinguished Lecturer since 2008 and lectured in this capacity in the USA, Denmark, Italy, and Brazil.
Prof. Boldea published extensively in linear and rotary motion electric machines design and control and MAGLEVs, including more than 200 papers and 18 books in the USA and the UK; he taught intensive courses repeatedly in the last 20 years in Europe, Asia, USA and Brazil and presented keynote addresses at numerous IEEE sponsored international conferences.
He is the recipient of IEEE Nikola Tesla Award for 2015.
Dr. Vladimir Blasko holds a position of a Senior Fellow at United Technologies Research Center, USA. Previously he worked for Otis Elevator Company - USA, Rockwell Automation - Allen Bradley Company USA, and Research Institute of Koncar Company - Zagreb, Croatia. Dr. Blasko has published more than 40 papers and holds more than 30 patents. He is IEEE Fellow, Adjunct Professor at the University of Wisconsin - Madison and Adjunct Professor of Electrical Engineering at the University of Zagreb – Croatia. He is a member of Connecticut Academy of Science and Engineering. His primary areas of research interest are power electronics, modern AC drives, distributed energy systems, intelligent power management, and applied modern control theory and technology.
Prof. Frede Blaabjerg
Department of Energy Technology
Frede Blaabjerg’s innovations in applying power electronics for the control and conversion of electric power have increased energy efficiency and provided more reliable connection of renewable energy sources to the power grid. His power converters for wind turbine systems have helped overcome scaling challenges. He also developed module and string inverters for solar photovoltaics that have found industrial use.
Prof. Blaabjerg’s grid-interfacing techniques include synchronization, smart monitoring, and design and control of filters for improving the quality of power being fed to the grid. His innovations involving adjustable speed drives include techniques for reducing noise in heating and cooling systems and lowering the cost of industrial drives by reducing the sensors needed while still maintaining failure protection.