Thursday, April 26, 2018
Texas Instruments, Building E Auditorium, 2900 Semiconductor Dr, Santa Clara, CA 95051
& Networking at 6:30 P.M.- 7:00 P.M.
Talk at 7:00 P.M. - 8:00 P.M.
Co-sponsored with SF Bay IEEE Power Electronics Society (PELS)
Optimizing Custom Magnetics for High-Performance Power Supplies
Michael D. Seeman, Ph.D., President and Founder, Eta One Power, Inc.
Power supply design and performance often revolve around the magnetic components. Only the simplest converters can use off-the-shelf inductors; most isolated and high voltage power converters must rely on custom inductors as each application has a unique requirement. Designers of power supplies must also be experts in magnetics, not just in circuits and controls.
Designers must consider winding DC resistance, core, proximity and fringing effect losses when designing their magnetics in the context of their specific power converter. This analysis is often abbreviated: core losses are taken using sinusoidal approximations to the waveform, and proximity and fringing effects are often neglected. Thus, engineers cannot adequately understand how the magnetics can be improved when considering these complex losses, and must iterate their inductor and transformer designs, increasing cost and time-to-market.
This talk will discuss the tradeoffs in power converter and magnetics design, with the goal of improving efficiency and power density. The discussion will utilize a new software tool for analyzing power converters with a unified approach, simultaneously analyzing circuits and devices, control stability, and magnetics performance. The software tools enable quick circuit and magnetics simulation with numerous integrated capabilities including efficiency calculations and loop stability analysis.
The principles and techniques discussed in the talk will be validated through the simulation and analysis of a 65W offline valley-switch-mode flyback converter. The losses of the converter will be analyzed in depth and compared with the accurate results created from the new analysis tool.
Dr. Michael Seeman is the President and Founder of Eta One Power, an engineering software startup company. Eta One Power is the company behind Eta Designer, the first simulation and analysis software that focuses on increasing power density and efficiency of power supplies. His focus is on the analysis and computational optimization of tradeoffs in power converter design.
He was formerly the Systems and Applications Engineering Manager in the Gallium Nitride Products Group at Texas Instruments. He has significant experience in cutting-edge power conversion solutions using wide-bandgap technologies, resonant converter architectures and modern magnetics structures. He previously worked in two Silicon Valley startups in the power electronics space.
Michael received his S.B. degree from the Massachusetts Institute of Technology and his M.S. and Ph.D. degrees from UC Berkeley. He is a member of the IEEE and the vice-chair for the SF Bay Area Chapter of PELS.
Slides will be uploaded later
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