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Power Magnetics @ High Frequency -  Eliminating the Smoke and Mirrors

Date: Saturday March 3 2018
APEC 2018 San Antonio Texas

The PSMA Magnetics Committee and IEEE PELS will conduct the third "Power Magnetics @ High Frequency" workshop on Saturday, March 3 2018, which is the day before and at the same venue as APEC 2018 in San Antonio, TX.

The purpose and focus of the workshop is to identify the latest improvements in magnetic materials, coil (winding) design, construction and fabrication, evaluation and characterization techniques and modelling and simulation tools so as to target the advancements that are deemed necessary by the participants for power magnetics to meet the technical expectations and requirements of higher application frequencies and emerging topologies that are being driven by continuous advances in circuits topologies and semi-conductor devices driven by new market applications.

The target audiences for the workshop include the designers of power magnetic components for use in electronic power converters responsible to implement the most technologically advanced power magnetic components to achieve higher power densities, specific physical aspect ratios such as low profile, higher power efficiencies and improved thermal performance. The target audiences also include people involved in the supply chain for the power magnetics industry ranging from manufacturers of magnetic materials and magnetic structures, fabricators of magnetic components, providers of modelling and simulation software as well as manufacturers of test and characterization equipment.

The workshop will consist of two technical lecture presentation sessions and an interactive technology demonstration presentation session. The two technical lecture presentation sessions will each be followed by a panel Q&A session and the technology demonstrations will also be available during the breakfast just prior to the opening session of the workshop and during the networking session following the workshop’s formal presentation sessions.

The morning session on ac power losses will begin with a keynote presentation by Charles Sullivan from The Thayer School of Engineering at Dartmouth College that will provide a technical overview of ac power loss calculation modelling and measurement issues. Stefan Ehrlich of Fraunhofer Institute will address accuracy and compensation issues for ac power loss measurements, Marcin Kacki of SMA magnetics will address impact of physical dimensions effects on core loss, Byron Beddingfield of North Carolina University will review generic test methods and Ed Herbert of PSMA will present a proposal for generic specification sheets.  Dr. Ray Ridley of Ridley Engineering will summarize the session with a discussion of “what’s needed going forward”. The morning session will be followed with a panel Q&A consisting of the morning’s presenters.

The lunch session will be an interactive technology presentation session during which the workshop attendees can visit and engage with the experts as they provide technical demonstrations of different topics associated with magnetics design, modelling and characterization. Some of the technical topics and experts are as follows:

  • Thermal limitations versus power loss efficiency limitations by Chris Oliver of Micrometals
  • Spice modelling of winding losses by Ray Ridley of Ridley Engineering
  • AC power loss under square wave excitation by JC Sun of Bs&T
  • Design and modelling issues associated with gapped cores by Bruce Carsten of Peak
  • DC-biased cores for high frequency applications by Sumida
  • Practical implementation of litz wire by Kyle Jensen of Rubadue
  • Impact of distributed gaps in air cores by Jan Simecek and Bernaud Michaud of Epcos
  • Additional technical demonstration sessions are also being planned.

If anyone would like to participate as a presenter for the technical demonstration session, please contact Matt Wilkowski at with a description of your proposed technical capabilities topic. We are limited to nine technology demonstration sessions.

The afternoon session on fringing effects will begin with a keynote presentation by Charles Sullivan that will provide a technical overview of the topics to be covered during this session.  Dr Johann Kolar of ETH will provide a presentation of the losses due to fringing flux in cut cores, Sumida will present simple analytical methods to calculate air gap induced eddy current losses in inductive components and Ranjith Bramanpalli of Wurth Elektronik will discuss near magnetic field considerations for power magnetics design. There also will be a presentation on power losses associated with distributed air gaps and the impact of fringing effects on practical design applications.  The session will be followed with a panel Q&A consisting of the afternoon’s presenters.

More details regarding the agenda for the workshop as well as registration for the workshop will become available on this page over the coming months.

Registration is limited and interested attendees are encouraged to register early. The early registration fee for the workshop is $325 per participant reducing to $225 for PSMA and IEEE PELS members and students. On February 1, 2018, the registration fee will increase to $375 reducing to $275 for PSMA and IEEE PELS members and students. Breakfast and lunch will be provided as part of the workshop. Electronic copies of the technical lecture presentations and technology demonstration presentations will be made available to the workshop participants. 

There will be up to 4 student waivers for registrations fees. Students can apply for one of the available waivers by submitting the Student Fee Waiver Application. The application deadline is December 22, 2017.

*The PSMA Capacitor Committee and IEEE PELS are sponsoring a Capacitor Workshop “Everything You Wanted to Know About Capacitors But Were Afraid to Ask” that will be held concurrently. Each workshop requires a separate registration and attendees will only be able to attend the workshop they have registered for, but the Capacitor and Magnetics Technical Demonstrations will be open to all attendees of both workshops.

Organizing Committee

Khurram Afridi, University of Colorado Boulder
Ali Bazzi, University of Connecticut
Steve Carlsen, Raytheon
Ed Herbert
Rodney Rogers, All Star Magnetics
Laili Wang, Xi'an Jiaotong University
Fred Weber, Future Technology Worldwide
Chuck Wild, Dexter Magnetics

Power Magnetics @ High Frequency – Transforming the Black Magic to Engineering 2017 Workshop Presentations

The presentations from Power Magnetics @ High Frequency – Transforming the Black Magic to Engineering 2017 Workshop are available at

Power Magnetics @ High Frequency – Solving the Black Magic! 2016 Workshop Presentations

The presentations from Power Magnetics @ High Frequency – Solving the Black Magic! 2016 Workshop are available at

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