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Thermal profile shaping and loss impacts of strain annealing on magnetic ribbon cores

Published online by Cambridge University Press:  29 May 2018

Richard Beddingfield Open the ORCID record for Richard Beddingfield [Opens in a new window] ,
Subhashish Bhattacharya ,
Kevin Byerly ,
Satoru Simizu ,
Alex Leary ,
Mike McHenry  and
Paul Ohodnicki
Richard Beddingfield*
Affiliation:
North Carolina State University, Raleigh, North Carolina, USA
Subhashish Bhattacharya
Affiliation:
North Carolina State University, Raleigh, North Carolina, USA
Kevin Byerly
Affiliation:
National Energy Technology Laboratory, Pittsburgh, Pennsylvania, USA; and Contractor to the US Department of Energy, AECOM, Pittsburgh, Pennsylvania, USA
Satoru Simizu
Affiliation:
Material Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
Alex Leary
Affiliation:
Materials and Structures Division, NASA Glenn Research Center, Cleveland, Ohio, USA
Mike McHenry
Affiliation:
Material Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
Paul Ohodnicki
Affiliation:
National Energy Technology Laboratory and Materials Science and Engineering, Carnegie Melon University, Pittsburgh, Pennsylvania, USA
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The use of the advanced manufacturing technique of strain annealing for nanocomposite magnetic ribbons enables control of relative permeabilities and spatially dependent permeability profiles. Tuned permeability profiles enable enhanced control of the magnetic flux throughout magnetic cores, including the concentration or dispersion of the magnetic flux over specific regions. Due to the correlation between local core losses and temperature rises with the local magnetic flux, these profiles can be tuned at the component level for improved losses and reduced steady-state temperatures. We present analytical models for a number of assumed permeability profiles. This work shows significant reductions in the peak temperature rise with overall core losses impacted to a lesser extent. Controlled strain annealing profiles can also adjust the location of hotspots within a component for optimal cooling schemes. As a result, magnetic designs can have improved performance for a range of potential operating conditions.

Keywords

annealingthermal conductivitymagnetic properties
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 15: Focus Issue: Soft Magnetic Materials: Synthesis, Characterization, and Applications , 13 August 2018 , pp. 2189 - 2206
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

b)

This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/editor-manuscripts/.

References

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