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Novel core designs to miniaturise passive magnetic components

Walker, Adam; Vakil, Gaurang; Gerada, Christopher


Assistant Professor


Converter sizes are often dominated by passive magnetic components. Passive magnetic component sizes are in turn limited by electromagnetic saturation and thermal limits. This paper covers two modifications to the air gaps of tape wound amorphous magnetic cores, made available by the advancement of additive manufacturing with magnetic materials. These are modifying the width of the core at the air gap and moving the air gap to a different location in the core. The objective was to reduce the effect of fringing flux, and to overcome the issue of a high loss zone and thermal hot spot being generated at the air gap, situated under the windings. These modifications will reduce temperatures and thus allow for smaller components before thermal limits are reached. The changes this causes to inductance, flux density and losses are highlighted and discussed.


Walker, A., Vakil, G., & Gerada, C. (2018). Novel core designs to miniaturise passive magnetic components. In NA

Conference Name ITEC 2018
Start Date Jun 13, 2018
End Date Jun 15, 2018
Acceptance Date Jun 13, 2018
Publication Date Jun 13, 2018
Deposit Date Oct 30, 2018
Publicly Available Date Oct 31, 2018
Book Title NA
Chapter Number NA
Keywords Magnetic core design; Magnetic losses; Passive magnetic components; Inductors
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