35 Years of Collaboration and Innovation 1981–2016
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WEMPEC Wisconsin Electric Machines & Power Electronics Consortium Education Research Technology 35 Years of Collaboration and Innovation 1981–2016 WEMPEC: www.wempec.wisc.edu 2559 Engineering Hall • 1415 Engineering Drive • Madison, WI 53706–1691 • Tel: 608–262–3934 • Fax: 608–262–5559 www.wempec.wisc.edu WEMPEC Founders Thomas A. Lipo Donald W. Novotny Table of Contents Founders’ Message Co-Directors’ Message ...............................................................2 Executive Director’s Message ................................................4 Sponsors.............................................................................................5 Faculty and Staff ............................................................................6 History ..............................................................................................16 Program Activities .....................................................................22 Tom Lipo Don Novotny Facilities ...........................................................................................32 he idea of an industrial support organization Family and the subsequent creation of WEMPEC T with the help of people like Norb Schmitz, Current Students ..................................................................34 Ken Phillips, and others has been one of the most Alumni ........................................................................................35 satisfying and rewarding experiences of our lives. When we founded WEMPEC in 1981, little did we Visiting Professors ................................................................41 know that this consortium of companies supporting Research Associates and Post-Docs .........................43 our research will likely outlive us! Maybe WEMPEC and the WEMPEC plan was a Visiting Scholars ....................................................................44 very good idea at exactly the right time, but the long-term success we celebrate at the 35-year mark owes everything to the dedication and hard work of the faculty, students, staff, and sponsors who have chosen to be part of the WEMPEC family. Over the past 35 years, our students and visiting researchers have contributed to literally every nook and cranny of the power electronics motor drive world. We are extremely proud of them and what they have accomplished both at UW–Madison and at their present places of employment in industry and academia. The WEMPEC organization has been crucial in providing us the support and incentive to carry out the work we love, and we both are content with the fact that we have left WEMPEC in good hands. Photo Credits: We thank all of you for your part in making reality Globe on cover, istockphoto.com cherezoff bigger than our dreams. Long live WEMPEC! Professional contemporary photos by Nick Berard, TNT Photography, and Yingie Li, WEMPEC Graduate Student Inside back cover aerial background image by University Communications 1 WELCOME 35 Years of Collaboration and Innovation 1981–2016 Greetings from Bob Lorenz & Tom Jahns, WEMPEC Co-Directors Bob Lorenz Tom Jahns s we celebrate WEMPEC’s highly productive consortium. We are we are making on preparations for 35th Anniversary, we invite incredibly fortunate that both of them WEMPEC’s future. First and foremost, A you to take advantage of this continue to make valuable contribu- the addition of Professors Bulent opportunity to learn more about tions to WEMPEC today. Sarlioglu and Dan Ludois as WEMPEC our consortium’s past, present, and This booklet gives us a welcome faculty colleagues represents a giant future. We hope that the material in opportunity to highlight the impres- step toward insuring that WEMPEC will this booklet will deepen your appre- sive accomplishments of our current continue to be at the forefront of new ciation of WEMPEC’s rich history that and graduated students who lie at the technical breakthroughs in the fields of has consistently emphasized rigorous very heart of WEMPEC’s education and electric machines, power electronics, and thoughtful preparation of our research missions. With over 400 gradu- machine drives, and their expanding students, careful attention to the future ates who have earned master’s and applications. As a team, we are working technology needs of our sponsors, doctoral degrees, WEMPEC has gained to strengthen our laboratory infra- and productive collaborations with an international reputation for the structure to insure that our faculty and research colleagues worldwide. technical competence of our gradu- students will continue to have access to To begin, we proudly acknowledge ates, distinguished by their broad and world-class research facilities. and thank WEMPEC’s two founders, deep multidisciplinary skills. WEMPEC’s Our commitment to fulfill our Professors Emeritus Don Novotny and success is reflected in the high levels education and technology transfer Tom Lipo, who collaborated to launch of professional success that have been mission is stronger than ever, reflected WEMPEC back in 1981 when the achieved by so many of our graduates. in the 20+ graduate and under- concept of a university/industry consor- We are extremely pleased that many graduate courses that we offer to tium in this field was new and untested. of our alumni maintain active relation- our students, one of the strongest It is a testimony to their vision and ships with our program by serving as academic programs of its type found dedication that they were so successful WEMPEC sponsor representatives. anywhere in the world. Building on in launching WEMPEC and overseeing As WEMPEC co-directors, we are 31 years of success, our distance its rapid growth into a stable and also pleased by the significant progress learning program continues to serve 2 our sponsors and engineers working in industry by offering these same courses online to off-campus students, WEMPEC’s Vision leading to either a capstone certificate To be the lifelong hub of a worldwide network of engineers who are active or graduate degrees in our master’s in all facets of power electronics and electromechanical power conversion and doctoral programs. and their applications. We conclude by expressing our heartfelt appreciation to all of our WEMPEC sponsors, past and present. We would not be here to celebrate WEMPEC’s Mission this special anniversary if it were not To maintain a tightly-coupled relation- To develop effective methodologies for the unflagging commitment of our ship between WEMPEC-supported for transferring new knowledge sponsors to support this joint enter- university research and educational gained in WEMPEC-supported prise. Our goal is to ensure that our programs and the engineers in global research to all engineers in industry sponsors will continue to benefit from industry who sponsor and support who sponsor and support this both our long-term research and our these programs. research, reflecting a long-term commitment to career development preparation of the next generation of To continuously improve the of engineers in our field. world-class engineers who will help WEMPEC program in order to more them maintain leadership positions in effectively foster and sustain the To globally foster the spirit of tech- the markets they serve. We are confi- growth of advanced electrical nological innovation and progress dent that the next 35 years will bring energy conversion technologies in electrical and electromechanical even greater success to this uniquely and their industrial, commercial, power conversion. productive and synergistic partnership! residential, consumer, automotive, and aerospace applications. 3 WELCOME Message from WEMPEC’s Executive Director Jim Sember n anniversary is a time to pause to consider where we’ve been and where we’re going. Like the ancient Roman god Janus, we look both to the past and the future. WEMPEC’s Apast has been characterized by significant ground-breaking research. During our 35-year history, notable accomplishments include: • Wind turbine design – 1984 • Multiphase motor control – 1994 • Reluctance machines – 1987 • Coaxial winding transformers – 1994 • Resonant link AC converter – 1988 • Active battery equalization – 1994 • Observer-based machine control – 1988 • Three level boost rectifier – 1995 • Adaptive tuning of field oriented drives – 1988 • Estimation of flux, position, and velocity in AC • Soft-switching – 1989 machines – 1997 • Active power filters – 1989 • Self-sensing control of switched reluctance • Loss minimizing control of IM drives – 1989 machines – 1998 JIM SEMBER • Optimal PM motor design for field weakening • Self-sensing control of AC machines – 1993–2016 WEMPEC Executive Director – 1990 • Vernier PM motor – 2000 • DSP field-oriented control – 1990 • Deadbeat-Direct Torque and Flux Control – 2001 • Vector control of synchronous reluctance machines • Microgrid control – 2002–07 – 1990 • FI-IPM machines – 2008 • Dual active bridge converters – 1990 • Wireless power transfer – 2010 • Axial flux PM motor – 1992 • Capacitive power transfer – 2012 • Accurate flux observers – 1992 • Variable leakage flux PM machines – 2012 • Doubly-salient PM motor – 1992 • Variable magnetization state PM machines – 2013 • Self-sensing field-oriented control – 1993 • Smooth torque flux-switching machines – 2014 • Inductive vehicle charging – 1993 • Electrostatic rotating machines – 2014 These accomplishments have been made possible by a uniquely talented group of faculty, many of whom have received world-wide recognition. In 2014 Professor Emeritus Tom