Nano-Magnetics For High Efficiency Power Supplies

Focus:

Magnetic passive technology based on ferrite core material is a key roadblock in the reduction of passive component volume, mainly due to the material’s lower saturation density. This slide presentation highlights the challenge of developing high flux density material with superior performance to ferrites. It evaluates the potential of available thin film materials as replacements for ferrites. Then, the author shows how a post-processing technique for thinning nanocrystalline material overcomes its major limitation—high eddy current losses. An inductor developed using this material is evaluated in a buck converter design, where the material is shown to reduce inductor volume and component losses versus a ferrite-based inductor. The presentation concludes with a roadmap for magnetic materials in power supply applications.

What you’ll learn:

• How to understand the potential of various thin film materials as better performing replacements for ferrites in power supply magnetics
• How to evaluate new core materials as replacements for ferrites in power electronics
• How to reduce eddy current losses in nanocrystalline thin film core materials

Notes:

This presentation was originally given at APEC 2015 in Industry Session 5: Nanotechnology--State & Federal Activities. But the slides shown here have been edited to include the author's commentary and to enhance readability.

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Author & Publication:

Santosh Kulkarni, Microsystems Center, Tyndall National Institute, University College Cork, Cork, Ireland, How2Power Today, May 15 2015

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