Original design of field grading materials for high voltage power module applications

Le, Trong Trung; Valdez-Nava, Zarel; Belijar, Guillaume; Diaham, Sombel; Laudebat, Lionel; Fetouhi, Louiza; Khazaka, Rabih

doi:10.1109/icd46958.2020.9341852

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…Such values can get close to the partial discharge inception or even worse to the breakdown of the encapsulation. Therefore, over the last few years, efforts have been made in finding new solutions to reduce the local electric field at the triple points by tailoring the encapsulation through field grading approaches [3,4]. Among them, one consists to increase the dielectric permittivity of the encapsulation materials by adding high permittivity (high-k) particles [5], like BaTiO3.…”

Section: Introductionmentioning

confidence: 99%

Thickness Dependence of Epoxy-Based Composites with BaTiO₃ Particles on AC Electrical Breakdown Strength

Escriva

Diaham

Bley

et al. 2022

2022 IEEE 4th International Conference on Dielectrics (ICD)

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This paper presents the study of the influence of the thickness and the concentration of high-k particles (BaTiO3) on composite AC breakdown where the matrix is an epoxy resin. The studied samples thicknesses are between 25 µm and 700 µm. The BaTiO3 particle concentration is ranging between 0 and 30 vol%. The AC breakdown results show an impact of the particle content on the breakdown as well as the thickness. A difference on the scale parameter "α", representative of the breakdown voltage, highlighted that the breakdown strength for the composites is proportional to ~d-0.5 (>200 µm), for all concentrations.

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Section: Introductionmentioning

confidence: 99%

Thickness Dependence of Epoxy-Based Composites with BaTiO₃ Particles on AC Electrical Breakdown Strength

Escriva

Diaham

Bley

et al. 2022

2022 IEEE 4th International Conference on Dielectrics (ICD)

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Process optimization for heterogeneous capacitive grading materials by voltage and time monitoring

Khazaka²,

Nava

et al. 2021

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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In the aerospace field, transportation electrification is considered as one of the main solutions that allow the reduction of greenhouse gas levels in the air and slow down the climate change. One of the ways that can allow to reach this goal for electrified systems is the voltage increase and reduce the volume of system onboard. This approach induces consequently induce very high electrical constraints on the insulation materials used in the power conversion systems. These local high electric fields can cause premature failure, by partial discharge activity and insulation breakdown. In order to efficiently reduce the electrical stresses, the design of new system of stress-control encapsulation seem be promising it does not impact the volume of the power module and has a negligible impact on the overall mass. An approach based on the use of low filler ratio composites and the monitoring of the particles (SrTiO3, BaTiO) density by the electric potential to tailor around critical areas where the electric field is high has been validated on simple configuration between two adjacent electrodesErreur ! Source du renvoi introuvable.Erreur ! Source du renvoi introuvable.. In addition, this approach has been used successfully to apply the FGM on various substrate electrodes of a power module by using a removable electrode in front of the substrate Erreur ! Source du renvoi introuvable.. In this paper, the impact of the applied electric potential and its duration will be presented in order to evaluate and optimize the process to allow apply an electrodeposition with a homogenous thinness of stress-control layer.

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Original design of field grading materials for high voltage power module applications

Cited by 2 publications

References 12 publications

Thickness Dependence of Epoxy-Based Composites with BaTiO₃ Particles on AC Electrical Breakdown Strength

Thickness Dependence of Epoxy-Based Composites with BaTiO₃ Particles on AC Electrical Breakdown Strength

Process optimization for heterogeneous capacitive grading materials by voltage and time monitoring

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