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Double Sided Conduction in N:1 Transformers | IEEE Conference Publication | IEEE Xplore

Double Sided Conduction in N:1 Transformers


Abstract:

In the high-frequency regime (HF, 3-30 MHz), the proximity effect in transformers can lead to large losses due to undesired current crowding and circulation. Litz wire’s ...Show More

Abstract:

In the high-frequency regime (HF, 3-30 MHz), the proximity effect in transformers can lead to large losses due to undesired current crowding and circulation. Litz wire’s efficacy does not scale well past a few and interleaving solid conductors leaves much conduction area underutilized. Field-shaping techniques have recently been proposed to achieve double-sided conduction, resulting in twice as much conduction area in interleaved solid-conductor layers compared to normal interleaving. While double-sided conduction has been demonstrated in 1:1 transformers, we explore in this paper the application of the double sided conduction design methodology to non-unity turns ratio transformers. We validate our conclusions with a 4:1 double sided conduction foil-wound transformer optimized for operation at 13.56 MHz, and compare it to a standard-interleaved foil-wound transformer, a magnet wire-wound transformer and a litz-wound transformer. We find that it is possible to achieve double sided conduction in non-unity turns ratio transformers and that they can achieve better performance than standard interleaving, magnet wire and litz wire in the MHz regime.
Date of Conference: 25-29 February 2024
Date Added to IEEE Xplore: 02 May 2024
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Conference Location: Long Beach, CA, USA
University of Texas at Austin, Austin, TX, USA
University of Texas at Austin, Austin, TX, USA
University of Texas at Austin, Austin, TX, USA
University of Texas at Austin, Austin, TX, USA
University of Texas at Austin, Austin, TX, USA

University of Texas at Austin, Austin, TX, USA
University of Texas at Austin, Austin, TX, USA
University of Texas at Austin, Austin, TX, USA
University of Texas at Austin, Austin, TX, USA
University of Texas at Austin, Austin, TX, USA

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