Bobbin design for conduction-cooled, gapped, high-permeability magnetic components
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United States of America Patent
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Apr 10, 2018
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N/A
app pub date -
Nov 27, 2013
filing date -
Dec 5, 2012
priority date (Note) -
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Abstract
A coil former, also referred to herein as a bobbin, is provided for use in conduction-cooled magnetic components that contain an air gap. The diameter of the disclosed bobbin is increased and ribs/splines or tabs are created to keep the winding centered about the core center post while allowing thermally conductive silicone-based or equivalent encapsulant to fill the voids between the coil former and the core, the coil former and the windings and/or both depending on the placement of the locating tabs. The disclosed bobbin may be fabricated from traditional injection molding resins or from high-thermal conductivity resins. As a result of the disclosed bobbin designs, the achievable power density is increased while maintaining acceptable temperatures.
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