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Magnetics Info & Resources
for the Power Electronics Industry.

Power Magnetics @ High Frequency 2024 Workshop Presentations

Presentation recordings (click to expand)

Technical Session - Design and Optimization of Magnetics for Different Applications 

Keynote: Opportunities for New Magnetics Designs to Address Market-Driven Technology Trends in Automotive Applications (Johan Kolar/Jannik Schäfer, ETH Zürich)

Advanced Algorithms in Magnetic Design: Trends in Modeling and Optimization (Jonas Mühlethaler, Frenetic)

Panel Discussion (Mühlethaler, Schäfer)

Magnetics for VRM Applications (Qiang Li, Virginia Tech - CPES)

Inductor Optimization Based on Choice of Different Magnetic Materials (Lukas Mueller, Micrometals)

Low Inductance Film Capacitors for Inverter Applications (David Zawacki, Cornell Dubilier)

Panel Discussion (Li, Mueller, Mühlethaler, Schäfer, Zawacki)

 

Technical Session - Thermal Design and Other Special Issues: Partial Discharge, Insulation, etc.

Keynote: Thermal, Scaling and Dielectric Issues in Magnetics Design (Charles Sullivan, Dartmouth College)

Leading Edge Power Magnetics Design - Multi -physical, Multi-dimensional Optimization Relative to Electrical, Thermal and Commercial Objectives (Roman Jamy, Yageo - Kemet)

Characterization of Partial Discharges in High-frequency Transformer under PWM Pulses (Zhicheng Guo, Arizona State University)

Thermal Issues with Power Magnetics (Subhashish Bhattacharya, North Carolina State University)

Panel Discussion (Bhattacharya, Guo, Jamy, Sullivan)

Closing Remarks: Best of the Best (Alexander Gerfer, Wurth Elektronik)

 

Presentation slides (click to expand)

Technical Session - Design and Optimization of Magnetics for Different Applications

Technical Session - Thermal Design and Other Special Issues: Partial Discharge, Insulation, etc.

Technology Demonstrations Session

Posters

Power Magnetics @ High Frequency 2023 Workshop Presentations

Presentation recordings (click to expand)

Power Magnetics Design - Milliwatts to Kilowatts 

Keynote: The Broad Spectrum of Technical Requirements for Power Magnetics Across Power Levels and Applications (Mike Ranjram, Arizona State University)

Resonant Magnetics for Capacitive Wireless Power Transfer (Khurram Afridi, Cornell University)

Panel Discussion (Ranjram, Afridi)

Design of Planar transformer and Inductor for 7 kilo-Watt Application (Harold Eicher, Champs Technology)

Wireless Power Transfer - Useable in Robots? (Cem Som, Wurth Elektronik)

Low-profile Integrated Magnetics for Low-power Applications (Ranajit Sai, Tyndall)

Panel Discussion (Afridi, Eicher, Ranjram, Som, Sai)

 

Addressing Specific Requirements for Power Magnetics Design

Keynote: Custom Magnetics - Stories of Conflict, Tradeoff and Creation (Victor Quinn, Exxelia)

Addressing Temperature Ratings and Safety Agency Regulations In Magnetics Design (Doug Eaton, Triad Magnetics)

Resins in Power Magnetic Design – Potting and Encapsulation - Matching Chemistry to Performance (Darryl Lallande, Elantas)

A Novel Insulation Method and Practical Considerations for MV/MF Transformer Designs in SST Applications (Mahmoud Mansour, Utah State University)

Panel Discussion (Eaton, Lallande, Mansour. Quinn)

Closing Remarks: Best of the Best (George Slama, Wurth Elektronik)

 

Presentation slides (click to expand)

Technical Session - Effects of Core Geometries on Magnetic Characteristics

Technology Demonstrations Session

Technical Session - Design for Manufacturability, Reliability and Safety

APEC 2022 Industry Session - IS01 - What It Takes to Commercialize Great Ideas
IS01.1_Houston! We have a Transformer problem!997.02 KBIS01.2_Planar Transformer Design – Options, Design Rules and Tools1.71 MBIS01.3_Manufacturing Soft Ferrites: Pros and Cons of Pressing vs. Machining3.3 MBIS01.4_Bobbins, designing for high volume production2.54 MBIS01.5_Leakage Inductance Quantifying and Controlling1.08 MBIS01.6_The Supply Chain for Magnetics1.1 MBIS01.7_Transformer Safety1.23 MB
2022 Power Magnetics @ High Frequency Workshop Presentations

Presentation recordings (click to expand)

Effects of Core Geometries on Magnetic Characteristics

     
Geometry Effects on Magnetic Core Losses (Juan Aguarón, Frenetic)   Keynote: Magnetic Core Geometry Influences on Component Performance (Dr. Charles Sullivan, Thomas Guillod, Dartmouth College)   Panel Discussion (Aguarón, Sullivan)
   
Uncertainties of Ferrite Parameters (Rico Wachs, JC Sun, TRIDELTA Weichferrite)   Where Does Current Actually Flow in High-Frequency Magnetic Components? (Alex Hanson, University of Texas at Austin)   Panel Discussion (Aguarón, Hanson Sullivan, Sun)

Design for Manufacturability, Reliability and Safety

   
Keynote: The Journey to Reliable Magnetics (George Slama, Wurth Elektronik)   Planar Magentics for Auxiliary Power Supplies (Vladimir Alexiev, Power Integrations)   Considerations for Reliable Magnetics, A non-exhaustive reference (Matt Dvorak, BH Electronics)
   
Optimization of Power Magnetics Design (Dennis Feucht, Innovatia Laboratories)  

Panel Discussion (Alexiev, Dvorak, Feucht, Slama)

   Closing Remarks: Best of the Best (Alexander Gerfer, Wurth Elektronik)
Magnetics/ Capacitor Rap Session   Technology Demonstrations  
   
Magnetics/ Capacitor Rap Session; Moderator - Alexander Gerfer, Wurth Elektronik  

Near Field Probes for Measurements and Characterization of Near Magnetic Fields; Arturo Mediano, HF Magic Lab, University of Zaragoza

 

Presentation slides (click to expand)

Technical Session - Effects of Core Geometries on Magnetic Characteristics

Technology Demonstrations Session

Technical Session - Design for Manufacturability, Reliability and Safety

 

APEC 2021 Industry Session - IS01 - High Frequency Magnetics, New Magnetic Materials
IS01.1-How Material Selection and Processing Affect the Final Magnetic Properties.pdf2.32 MBIS01.2-Equivalent Ferrite Materials, What Cross-Reference List Does Not Tell You.pdf1.35 MBIS01.3-New Trends in High Efficiency Amorphous and Nanocrystalline Soft Magnetic Materials.pdf3.09 MBIS01.4-Low Loss Powder Core Materials Kool Mµ Hƒ for High Frequency & Edge™ for Compact Power.pdf1.27 MBIS01.5-New Iron Nitride Soft Magnetic Components.pdf6.34 MBIS01.6-Recent Advances in Thin-Film Magnetics for Power Applications.pdf3.04 MBIS01.7-Broadband Suppression Materials.pdf883.36 KBIS01.8-Selecting Common Core Materials.pdf1.37 MB
2021 Power Magnetics @ High Frequency Workshop Presentations

Presentation Slides

Day 1 EMI Issues Caused and Solved By Magnetics (click to expand)

Session I

Session II 

Day 2 Integrated Magnetics (click to expand)

Session I 

Session II 

Presentation Recordings

Day 1 EMI Issues Caused and Solved By Magnetics (click to expand)

Session I    

Active EMI Filters for High Power Density Converters;  Balaji Narayanasamy, Tesla

 

Impact of Power Inductor on EMI Performance of DC/DC Converters; Ammad Javed, Ernst Abbe University of Applied Science Jena

Influence of Different Core Materials on the Frequency Response of a Line Filter; Stefanie Birkenbach, Wurth Elektronik

EMI Suppression Ferrites; Michael Arasim, Fair-Rite Products Corp.

EMI Mitigation Techniques for Wide-Bandgap Devices (WBDs); Jared Quenzer, Wurth Elektronik

Damped Oscillation Validation of Nanocrystalline Core for Common Mode Choke; JC Sun, Bs&T

EMI Filter Designer; Frank Puhane, Wurth Elektronik

Near Magnetic Field Measurements and EMI Measurements; Asif Imran Emon, Stoneybrook University

  
Session II    

Day 1 Session II Introduction, Best of the Best; Alexander Gerfer, Wurth Elektronik

Keynote: High Frequency “side-effect” Mitigation in Power Electronics Converters: Modeling and Integrated Filtering Solutions; Fang Luo, Stoneybrook University

Panel Discussion; All presenters from Day 1 Session I and Session II

Day 2 Integrated Magnetics (click to expand)

Session I    

Think Outside the Core: Frequency-Domain Model Enables Accurate Time-Domain Simulation of Coupling Effects and Winding Losses; Bryce Hesterman, Utah State University

Magnetic Component Integration for Increased Efficiency, Improved Power Density and Reduced Cost; John Gallagher, Pulse Engineering

VIRT: A Coupled Electronic and Magnetic System for High-Step-Down, High Output-Current Power Conversion; Mike Kavian Ranjram, MIT

Design of Integrated Magnetics using Artificial Intelligence; Chema Molina, Frenetic

A Method for Modeling Magnetics with Coupled Windings Using Equivalent Circuits Based on Mutual Impedances; Bryce Hestermann, Utah State University

PCB Winding Integrated Coupled Inductor for Multi-Phase PFC Converter; Shuo Wang, Virginia Tech - CPES

New Powder Core Materials for Input Filter Chokes; John Noble, Spang Magnetics

    
Session II    

Day 2 Session II Introduction, Best of the Best; Alexander Gerfer, Wurth Elektronik

Keynote: High Efficiency and High Density 48V LLC Converters with Integrated Planar Magnetics for Data Center Application; Qiang Li, Virginia Tech - CPES

Panel Discussion; All presenters from Day 2 Session I and Session II

 

APEC 2020 Industry Session - Magnetic Design Applications
IS01.1 - Optimized Inductor Designs for DCDC Buck Converters from 150 kHz to 3 MHz Using Distributed Gap Core Materials.pdf10.44 MB IS01.2 - Flyback Continuous Mode for Planar Transformer Design Tutorial.pdf4.32 MB IS01.3 - Combined Inductor and Transformer Design for Resonant Converters.pdf1.03 MB IS01.4 - Design_Space_of_Flyback_Transformers.pdf2.38 MB IS01.5 - Transformer_Design_Consideration_for_Full_Bridge_Phase_Shift.pdf2.67 MB IS01.6 - From Brute Force Grid Search to Artificial Intelligence Which Algorithms for Magnetics Optimization.pdf2.68 MB IS01.7 Magnetics_Design_Considerations_for_Wireless_or_Contactless_Power_Transfer_for_EV_Charging_and_Data.pdf2.56 MB
Power Magnetics @ High Frequency Workshop 2020

May 12     Winding Techniques Part I

May 19     Winding Techniques Part II

June 2    Software Modelling Techniques  

Recording Part I Recording Part II

June 9   Measurements for Developing Models

June 16   Modelling Magnetic Materials

 

PSMA-SMA Core Loss Studies - Phase II Final Report

PSMA Basics of Magnetics for Switching Power Webinar Series

Basics of Inductors - January 22, 2020

      

Basics of Power Transformers - February 12, 2020

      

APEC 2019 Industry Session - High Frequency Magnetics; New Magnetic Materials
IS01.1 Materials Paradigm As Applied to New and Evolving Power Magnetic Materials.pdf4.52 MB IS01.2 Strain Annealed Metal Amorphous Nanocomposite Soft Magnetic Materials.pdf4.23 MB IS01.3 High Bs Ferrite Material for High Power Applications.pdf1.86 MB IS01.4 Design Considerations for High Frequency Magnetic Materials.pdf1.59 MB IS01.5 Soft Magnetic Metal-Flake Composite Material Suitable for High Frequiency Power Modules.pdf1.94 MB IS01.6 New and Modified Alloy Powder Core Materials.pdf1.44 MB IS01.7 Materials Magic – Nanocrystalline, Amorphous and Powdered Amorphous Cores.pdf1.92 MB
Power Magnetics @ High Frequency 2019 Workshop Presentations

Presentation recordings (click to expand)

AC Core Loss

     
Keynote: High Frequency Effects in the Core (Gerald Hurley, National University of Ireland, Galway)   Magnetics Core Dimensional Effects - Flux Propagation in Ferrites (Marcin Kacki, SMA Magnetics)   Panel Discussion (Hurley, Kacki)
   
Series-coupling Characterization of High-Leakage Magnetic Components (John Hayes, University College Cork)   Lumped Transmission Line Model for Displacement and Conductive Eddy Currents in Ferrite Cores (Charles Sullivan, Dartmouth)   Standardized Testing and Data Sheets (Seung Ryul Moon, National Energy Technology Laboratory)
       
Panel Discussion (Hurley, Hayes, Sullivan, Moon)        

Thermal Management of Power Magnetics

   
Keynote: Recent Trends in Design and Techniques to Influence Thermal Performance of Magnetic Components (Peter Wilson, University of Bath)   Thermal Issues Associated with the Design of Solid State Transformers (Subhashish Bhattacharya, NCSU FREEDM)   Getting the Heat Out (George Slama, Wurth Elektronik)
   
Spice Modelling of the Transformer Losses and Thermal Based Verifications (Qichen Yang, Georgia Tech RISE)   Panel Discussion (Wilson, Bhattacharya, Slama, Yang)   Closing Remarks: What Is Right With Magnetics (Alexander Gerfer, Wurth Elektronik)

Presentation slides (click to expand) 

Technical Session - AC Core Loss

Technology Demonstrations Session

Technical Session - Thermal Management of Power Magnetics

Closing Remarks

 

APEC 2018 Industry Session - High Frequency Magnetics - Winding Design
IS02.1 Core Loss Initiative Technical.pdf2.25 MBIS02.2 GaN Technology as an enabler for.pdf5.33 MBIS02.3 Winding Capacitance.pdf271.97 KBIS02.4 Foil Windings for SMPS.pdf1.44 MBIS02.5 Litz wire When is it an Advantage.pdf3.27 MBIS02.6 An Application-Oriented Determination of Losses within High Frequency Power Inductors.pdf1.14 MBIS02.7 A Spice Model for Windings.pdf772.16 KB
Power Magnetics @ High Frequency - Eliminating the Smoke and Mirrors 2018 Workshop

Presentation recordings (click to expand)

We apologize for the poor sound quality on many of these recordings due to technical A/V problems at the workshop.

Core Losses

     
Keynote Part I: Core Loss: What We Know and What We Don't Know (Charles Sullivan, Dartmouth)   Accuracy and Compensation Issues for AC Power Loss Measurements (Stefan Ehrlich, Fraunhofer Institute)   Magnetic Core Dimensional Effects - Flux Propagation in Ferrites (Marek Rylko, SMA Magnetics)
   
Generic Specification for Ferrite Cores (Ed Herbert, PSMA)   Multi-parameter Magnetic Material Characterization for High Power Medium Frequency Converters (Byron Beddingfield, NCSU)   What's Needed Going Forward (Ray Ridley, Ridley Engineering)
       
Panel Discussion (Sullivan, Ehrlich, Rylko, Herbert, Beddingfield, Ridley)        

Fringing

   
Keynote Part II: Fringing Effects (Charles Sullivan, Dartmouth)   Mystery Losses in Multi Air Gap (MAG) Inductor & Quantification By Means Of Advanced Thermometry (Dominik Neumayr, ETH Zurich)   A simple analytical method to calcualte air gap induced eddy current losses in inductive components (Michael Baumann, Sumida)
   
Impact of Fringing Effects on Design of DC-DC Converters (Michael Seeman, Eta One Power)   Near Field Radiation of Storage Inductors in Power Electronics –Causes, Prevention & Suppression (George Slama, Wurth Elektronik)   Panel Q & A (Sullivan, Neumayr, Baumann, Malcolm, Seeman, Slama)

Presentation slides (click to expand) 

Technical Session - Core Loss

Technology Demonstrations Session

Magnetics

Capacitor

Technical Session - Fringing

 

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

Presentation recordings (click to expand)

Keynote Session

     
Impact of Magnetics on Power Electronics Converter Performance – State of the Art and Future Prospects (Johann Kolar, ETH Zurich)   Smaller-Faster-Lower Cost—Magnetic Materials Meet Rigorous Demands in Today’s High Power Fast-Paced Design Landscape (Donna Kepcia, Magnetics)   Panel Q & A (Kolar, Kepcia)

Special Issue Session - Measurement of AC Power Loss

   
Opening Remarks (Ray Ridley, Ridley Engineering)   Survey of Different Test Methods (Charles Sullivan, Dartmouth)   Waveforms for Simulating Magnetic Cores (Bruce Carsten)
   
Challenges to Improving the Accuracy of High Frequency (120 MHz) Test Systems (Zoran Pavlovic, Tyndall)   Parameter Extraction (Data Crunching) (Ed Herbert, PSMA)   Industry Standardization (Chuck Wild, Dexter Magnetics)
       
Panel Q & A (Ridley, Sullivan, Carsten, Pavlovic, Herbert, Wild)        

Technology Issues Session

   
Package and Integration Technology in Point-of-load Converters (Laili Wang, Xi'an Jiaotong University)   Developing Materials and Geometries for High Frequency Power Magnetics (John Lynch, Fair Rite)   Panel Q&A (Wang, Lynch)

Special Issue Session - Spice Modelling of AC Power Loss

   
Overview of Modelling Methods (Charles Sullivan, Darthmouth)   Spice Models For Conductor Losses (Ray Ridley, Ridley Engineering)   Spice Models for Core Losses (Ed Herbert, PSMA)
       
Panel Q & A (Sullivan, Ridley, Herbert)        

Presentation slides (click to expand) 

Keynote Session

Special Issue Session - Measurement of AC Power Loss

Technology Demonstration Session 

Technology Issues Session 

Special Issue Session - Spice Modelling of AC Power Loss

 

APEC 2017 Industry Session - High Frequency Magnetics: Transforming the Black Magic to Engineering
IS1.1 Power Magnetics High Frequency State-of-the-Art and Future Prospects.pdf6.98 MBIS1.2 New Materials and Design Tools for Magnetic Materials Suitable for GaN and SiC Switching Frequencies.pdf1.69 MBIS1.3 Thin Amorphous Core Material for Power Applications.pdf1.98 MBIS1.4 Core Loss Initiative - Technical.pdf1.15 MBIS1.5 Introduction to the IMA Working Group.pdf466.02 KBIS1.6 Magnetics Modeling in Spice - Proximity Loss.pdf997.93 KBIS1.7 Core Loss Modeling.pdf1.9 MB
Power Magnetics @ High Frequency – Solving the Black Magic! 2016 Workshop
Power Magnetics @ High Frequency – Solving the Black Magic! 2016 Workshop Agenda.pdf86.24 KBMeasurements and Applications Considerations of Magnetic Materials at High- and Very-High Frequencies.pdf4.1 MBPerrault Measurements and Application Considerations of Magnetic Materials at High- and Very-High Frequencies.mp471.27 MBMagnetics Modeling.pdf1.01 MBRidley Magnetics Modeling.mp452.03 MBHigh-Frequency Magnetics Design Overview and Winding Loss.pdf4 MBSullivan High-Frequency Magnetics Design.mp475.17 MBMagnetics Design for High-Efficiency Compact Resonant Converter Architectures.pdf7.28 MBAfridi Magnetics Design for High-Efficiency Compact Resonant Converter Architectures.mp467.66 MBMatrix Transformer Building Blocks for High Frequency Applications.pdf3.78 MBLau Matrix Transformer Building Blocks for High Frequency Applications.mp470.19 MBThe Integration of Analytical and Numerical Methods for Power Magnetic Component Design.pdf3.86 MBPollock The Integration of Analytical and Numerical Methods for Power Magnetic Component Design.mp459.73 MB
APEC 2016 Industry Session - High Frequency Magnetics; Black Magic, Art or Science?
IS9.1 High Frequency Magnetics Black Magic, Art or Science Magnetics Core Loss.pdf1018.82 KBIS9.2 Selecting Magnetics for High Frequency Converters Practical Hints and Suggestions for Getting Started.pdf1.34 MBIS9.3 The Future for SMPS Magnetics.pdf869.3 KBIS9.4 Accurate Estimation of Losses of Power Inductor in Power Electronics Applications.pdf1.75 MBIS9.5 Litz Wire a Practical Discussion of its Uses and Limitations in High Frequency Transformers.pdf667.8 KBIS9.6 Powder Core Materials for Magnetic Components in GaN and SiC Power Devices.pdf1.37 MBIS9.7 EMI Conducted and Radiated Emissions.pdf2.45 MB
APEC 2015 Industry Session
IS05-4 Nano-magnetics for High Efficiency Power Supplies, Santosh Kulkarni - Tyndall National Institute of Technology.pdf2.19 MB
APEC 2014 Industry Session - How are Magnetics Catching Up To SiC & GaN?
IS2-5-1 Frequency, Where We are Today, and Where We Need to Go, Dan Jitaru – Rompower6.6 MBIS2-5-2 Gecko Magnetics, Jonas Muehlethaler – Gecko-Simulations AG1.72 MBIS2-5-3 Demands for High-efficiency Magnetics, YiFeng Wu – Transphorm1.3 MBIS2-5-4 SiC Devices and their impact on Switching Characteristics, Ranbir Singh – GeneSiC Semiconductor, Inc.1.58 MBIS2-5-5 Magnetic Core Materials in HF Applications, Jonas Muehlethaler – Gecko-Simulations AG1.69 MBIS2-5-6 Windings for High Frequency, Dr. Charles Sullivan – Dartmouth College1.31 MBIS2-5-7 Magnetics for Solid State Transformer, Dr. Subhashish Bhattacharya – North Carolina State University1021.7 KBIS2-5-2X How SiC & GaN Catching up to Planar Magnetics, Jim Marinos – Payton America, (he was unable to give his presentation, but has provided the slides)1.1 MB
APEC 2012 Industry Session - Trends for AC Power Loss of High Frequency Power Magnetics
2012 APEC - IS 1.3.1A Ferrite Watt Loss Testing Common Manufacturing Practices.pdf1.07 MB2012 APEC - IS 1.3.1B Measurement and Modeling of Core Loss in Powder Core Materials.pdf1.04 MB2012 APEC - IS 1.3.2 A Series of New High Frequency Core Loss Measurement Methods.pdf983.84 KB2012 APEC - IS 1.3.3 Overview of Core Loss Prediction and Measurement Techniques for Non-Sinusoidal Waveforms.pdf353.72 KB2012 APEC - IS 1.3.4 Core Loss Modeling of Inductive Components Employed in Power Electronic Systems.pdf604.87 KB2012 APEC - IS 1.3.5 Coupled Electromagnetic and Thermal Analysis of Ferrite Core Electronic Planar Transformer.pdf2.52 MB2012 APEC - IS 1.3.6 Development of Low AC Power Loss Multi Layer Inductor (Today and Future).pdf971.37 KB2012 APEC - IS 1.3.7 Expert Design and Empirical Test Strategies for Practical Transformer Development.pdf1.53 MB