An Accurate Filament Based Approach to Determine Inductance Matrix of Air-Cored Planar Windings

Ashiq Muhammed, PE and Jan, M and John, V (2023) An Accurate Filament Based Approach to Determine Inductance Matrix of Air-Cored Planar Windings. In: UNSPECIFIED.

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Abstract

Over the last decade, there is an aggressive trend towards miniaturised and efficient high frequency power converters. Wire-wound magnetic components which are the main bottlenecks in miniaturisation, are now being replaced by planar magnetic components. Printed circuit board-based air-core planar inductors can eliminate challenges with the usage of magnetic materials, such as iron loss and magnetic saturation. This paper proposes a novel and simple method to evaluate the inductance matrix of the air core axi-symmetric circular planar winding from the vector potential. A set of circular current filaments are placed inside each turn to evaluate the vector potentials and the property of magnetic equipotential at the surface of the conductor is used to evaluate these filament currents. The inductance matrix is then calculated from these vector potentials. The salient advantage of the proposed method is the incorporation of the effect of proximity of nearby turns which was ignored in all the previous filament-based approaches. The proposed method is then verified on a three-turn four-layer planar winding and the results are compared with FEM simulation and with different analytical methods available in the literature as well. © 2023 IEEE.

Item Type:	Conference Paper
Publication:	2023 IEEE International Conference on Power Electronics, Smart Grid, and Renewable Energy: Power Electronics, Smart Grid, and Renewable Energy for Sustainable Development, PESGRE 2023
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	16 May 2024 04:55
Last Modified:	16 May 2024 04:55
URI:	https://eprints.iisc.ac.in/id/eprint/84530

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