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SMMA Motor & Motion College
THREE COURSES PRIOR TO THE SMMA 2008 FALL TECHNICAL CONFERENCE October 15, 2008 Sheraton Westport Hotel, St. Louis How to Improve Electric Motor Power Efficiency 8:30 am - 5:00pm The general power efficiency equation for all electric motors will be derived, followed by a description/discussion of the actual physical mechanisms that create power loss inside the motor. Finally, practical ways that can be used by both motor manufacturers and users to improve power efficiency in both existing and new motor designs will be described. Instructor Richard Welch Jr. received his BSEE and MSEE degrees from the University of Minnesota specializing in magnetics and electro-magnetic field theory. In 1970 he began his professional career in the electric motor industry at the former Electro-Craft Corporation. There he designed, built, tested and mathematically modeled high performance brush and brushless DC servomotors along with conducting extensive research on motor related issues such as mechanical resonance, dynamic braking, heat transfer, and power efficiency. In 1980 he changed his focus and became Manager of R&D for Despatch Industries Inc. At Despatch, he acquired a hands-on, in-depth understanding of heat transfer and thermal issues by conducting numerous experiments on different products and materials using microwave, infrared, dielectric, and convection air ovens. Since 1985 he has been an independent consultant to both the electric motor and industrial heat processing industries. In this capacity he has been involved with design, development, manufacturing, cost saving, and application projects for several clients. In 1993 he became the Certified Motor's Instructor for the Association of International Motion Engineers (AIME) and in this capacity created several tutorials on different aspects of electric motor technology and taught these tutorials at many conferences and trade shows as well as to private industry. In addition, Richard recently became an Adjunct Faculty Member at the University of Saint Thomas and has published more than 30 technical papers and articles relating to Servomotors and Motion Control Applications. Fundamentals of Brushless Motor Control 8:30 am - 5:00pm The purpose of this course is to provide fundamental concepts and knowledge necessary to design and apply DC and Brushless motor drives. This course is intended for design engineers and field application engineers in the motion control industry who wish to clarify basic principles. The course will also include brief discussion on the magnetic and mechanical structure of the various motor types to understand torque production mechanisms and to derive a circuit model. The content will cover most of the basic skills in designing brush and brushless DC motor drives including power electronic circuits, analog and digital motor control hardware, gate drive and feedback sensors, with particular, emphasis on motor control algorithms and servo systems. From the author's long experience in research and development of many types of drives, practical and useful procedures in selecting components and methods, rule-of-thumb design rules, performance vs cost trade-off etc., will be discussed.
1:00pm - 5:00pm Two
topics or recent technology trends in each of three areas of electric
machine and drive design that have been receiving attention in the
literature and research labs will be discussed. Attendees can expect
to gain an appreciation of the potential benefits of using the technology
and whether it might be suitable for their operations and applications.
For each topic, the presentation will include: Instructor Keith W. Klontz, PhD is President and Founder of Advanced MotorTech LLC (SMMA Affiliate Member), a computer-aided engineering (CAE) services company with emphasis on electric machine and magnetic component design. He holds BS & MS degrees in Electrical Engineering from the University of Illinois, Champaign-Urbana, and a PhD in Electrical Engineering from the University of Wisconsin-Madison. Dr. Klontz is a world-recognized expert in electric machine design and has over 35 years hands-on experience with electric machine design engineering, from concept to performance to failure analysis. He has been involved in the research, development and testing of high performance and high efficiency machines from 10 Watts to 8 MW, with speeds ranging from angle positioning torque-motors to 60,000 rpm machines. Recent work includes implementing CAE tools and developing design techniques for the design of permanent magnet alternators, brushless d.c. motors, brush d.c. motors, high efficiency induction motors, and very high power density machines. Instructor
Howard Li, PhD is a Senior Engineer at Advanced MotorTech LLC.
He holds BS & MS degrees in Electrical Engineering from Shenyang
University of Technology, PR China, and a PhD degree in Electrical
Engineering from Clarkson University, USA. Dr. Li has more than
5 years of experience in the design, simulation, modeling, and development
of a wide variety of conventional and innovative machines, drives,
controls and electromechanical components. His work has ranged from
linear generators deriving power from ambient vibration to FEA short-circuit
transient analysis of megawatt-class machines, to 3D analysis of
transverse-flux machines based on new SMC core materials. His main
fields of interest are CAE electrical machine design, modeling and
analysis of motor drives, thermal analysis and coupled-physics field
analysis.
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