Permanent Magnet Machines and Drives Principles, Design and Applications

Applications and Technology Trends

• Review of PM machine applications
• Suitability for direct-drive applications
• High-power-density and high-efficiency applications
• Trends toward higher speed and higher power
• Trends toward higher motor-converter
  integration

Fundamentals of Synchronous Machines

• Equivalent circuit models
• d-q modeling for salient pole machine
• Magnetic circuit model
• Introduction to magnetic materials properties

Major PM Machine Topologies

• Features and comparative overview, attributes for selection
• Stator and rotor configurations, including radial and axial

PM Machine Design and Analysis, Tools, and Methods

• Electromagnetic
• Thermal and structural
• Parameter measurement
• Design for self-sensing

Drive System Issues for PM Motors and Generators

• Drive configurations and topologies
• Torque-speed characteristics

PM Drive Control

• Current regulators
• Vector control and direct torque control (DTC)
• Sensors, observers, and self-sensing control

Flux-Weakening Control

• Alternative control algorithms
• Interactions between machine design and control

Drive System Simulation

• Matlab/Simulink
• Rapid prototyping

Fault-Mode Operation

• Open-circuit and short-circuit faults
• Uncontrolled generator operation
• Demagnetization
• Fault-tolerant machine design

• Ian Brown

  Associate Professor, Electrical and Computer Engineering

  Ian P. Brown received the B.S. degree in engineering from Swarthmore College, Swarthmore, PA, in 1999, and the M.S. and Ph.D. degrees in electrical engineering from the University of Wisconsin, Madison, in 2003 and 2009, respectively. Since 2012, he has been with the Illinois Institute of Technology where he is currently an Associate Professor in the Electrical and Computer Engineering Department. Previously he was with the Corporate Technology Center, A. O. Smith Corporation, Milwaukee, WI. His main research interests are high-performance electrical drives and the design of electric machines.

• Thomas Jahns

  Grainger Professor of Power Electronics And Electric Machines

  Dr. Thomas M. Jahns received his bachelors, masters, and doctoral degrees from MIT, all in electrical engineering.

  Dr. Jahns joined the faculty of the University of Wisconsin-Madison in 1998 in the Department of Electrical and Computer Engineering.  He served for 14 years as a Co-Director of the Wisconsin Electric Machines and Power Electronics Consortium (WEMPEC), a world-renowned university/industry consortium in the electrical power engineering field.  Since 2021, he is the Grainger Emeritus Professor of Power Electronics and Electrical Machines.

  Prior to coming to UW-Madison, Dr. Jahns worked at GE Corporate Research and Development (now GE Global Research) in Niskayuna, NY, for 15 years, where he pursued new power electronics and motor drive technology in a variety of research and management positions. His current research interests at UW-Madison include integrated motor drives and electrified propulsion for both land vehicles and aircraft.

  Dr. Jahns is a Fellow of IEEE.  He received the 2005 IEEE Nikola Tesla Technical Field Award “for pioneering contributions to the design and application of AC permanent magnet machines”.  Dr. Jahns is a Past President of the IEEE Power Electronics Society.  He was elected to the US National Academy of Engineering in 2015 and received the IEEE Medal in Power Engineering in 2022.

• James Swanke

  Senior Motor Design Engineer

  James Swanke is an electrical machine designer with an extensive academic and professional background in electrical engineering. Graduating from the University of Wisconsin-Madison with a B.S. in 2014, a M.S. in 2019, and a PhD in 2023, James has developed a deep expertise in high-performance electrical machines. Prior to pursuing advanced degrees, he gained valuable experience working for Siemens specializing in the electromagnetic design of induction machines. During graduate studies, his research focused on the advancement of high-power density and fault-tolerant electrical machines for aerospace propulsion applications. Currently, James applies this extensive knowledge at H3X Technologies, where he continues to work on the development of cutting-edge permanent magnet machines.

• Program Director

  Erick Oberstar

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