1. Modeling and Minimization of the Parasitic Capacitances of Single-Layer Toroidal Inductors
- Author
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Florentin Salomez, Arnaud Videt, Nadir Idir, L2EP - Équipe Électronique de puissance (EP), Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 (L2EP), Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Université de Lille, Centrale Lille, Arts et Métiers Sciences et Technologies, Junia HEI, Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 [L2EP], and Laboratoire d'Électrotechnique et d'Électronique de Puissance (L2EP) - ULR 2697
- Subjects
[SPI]Engineering Sciences [physics] ,parasitic capacitance ,Common-mode chokes ,electromagnetic compatibility (EMC) ,equivalent parallel capacitance (EPC) ,inductor ,modeling ,Electrical and Electronic Engineering - Abstract
International audience; High-frequency power converters need electromagnetic interferences filters using common and differential mode chokes with low parasitic capacitance to comply with the electromagnetic compatibility standards. This article proposes a modeling method of this capacitance and ways to minimize it. The studied components are ring core inductors with magnetic materials considered as perfect conductors or with high permittivity, such as nanocrystalline material and most Mn-Zn ferrite materials. In comparison to other work in the literature, the proposed approach takes into account the curvature of the turn, in addition to the coating of the core and the insulation layer of the wire. The hypotheses, used in this article to simplify the real geometry, are compatible with two-dimensional (2-D) approaches to compute the parasitic interturns and turn–core capacitances. These capacitances are evaluated thanks to the 2-D finite element method. The obtained model allows accurate evaluation of the effect of turn–core space on the parasitic capacitance, and enables to reduce its value with a limited impact on the volume of the magnetic component.
- Published
- 2022
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