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New Advances in Magnetic Materials for Power Electronics Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Electronic Materials".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 6390

Special Issue Editors

Laboratoire Plasma et Conversion d’Énergie, Université de Toulouse, ENSEEIHT, CEDEX 7, 31071 Toulouse, France
Interests: power electronics; magnetic materials; magnetic modelling; simulation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Thanks to the recent advances in optimization algorithms, magnetic materials study and powerful simulation tools, the design of passive devices has been greatly improved. This not only increases the accuracy of the mathematic models, it also reduces the time of design consumption. Nowadays, passive components rule over the size, weight, and loss of many power electronics systems, with magnetics being the most challenging devices to design. Therefore, the academic and industry research challenge is focused on:

  • The selection of proper magnetic materials to construct inductors that can achieve an efficiency increment trough magnetic permeability and hysteresis improvements;
  • Modelling and designing improved high-frequency power magnetics, addressing skin and proximity effects.  

where both high-frequency magnetic materials and designs can yield improved performance.

The main aim of this Special Issue is to seek high-quality submissions that highlight contributions in new magnetic materials’ selection, and its design for power electronic applications.

The topics of interest include but are not limited to:

  • Magnetics modeling;
  • Optimization of electromagnetic devices;
  • Design of magnetic components;
  • Electromagnetic devices and application.

Prof. Dr. Thierry A. Meynard
Dr. Jaime W. Zapata
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • power electronics
  • magnetic materials
  • magnetic modelling
  • simulation

Published Papers (3 papers)

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Research

14 pages, 4089 KiB  
Article
Permeability of Magnetic Cores with Air Gaps
by Yuri N. Starodubtsev, Vladimir S. Tsepelev, Vladimir Ya. Belozerov and Viktor A. Zelenin
Materials 2022, 15(3), 1217; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15031217 - 06 Feb 2022
Cited by 2 | Viewed by 1788
Abstract
The influence of the geometric dimensions of the cut core and the number and size of air gaps on the effective permeability was investigated. Using dimensional analysis, an equation was obtained that relates the permeability of the cut core to the simplest dimensionless [...] Read more.
The influence of the geometric dimensions of the cut core and the number and size of air gaps on the effective permeability was investigated. Using dimensional analysis, an equation was obtained that relates the permeability of the cut core to the simplest dimensionless combination of the mean magnetic flux length l, single air gap length lg1, the cross-sectional area S of the core, and gap number ng. Permeability calculated from the geometric parameters of the cut core was compared with the effective permeability obtained using a two-dimensional FEMM simulation. Simulation has shown that the equation derived from dimensional analysis provides the best fit. The influence of each significant parameters l, lg1, ng, and S on cut core permeability is demonstrated. Experimental results have shown that an equation derived from dimensional analysis can be used to predict cut core permeability. In this case, one should take into account the residual air gap that forms after cutting the core. A method for assessing the residual air gap is proposed. Full article
(This article belongs to the Special Issue New Advances in Magnetic Materials for Power Electronics Applications)
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18 pages, 5444 KiB  
Article
FeZrN Films: Magnetic and Mechanical Properties Relative to the Phase-Structural State
by Elena N. Sheftel, Valentin A. Tedzhetov, Eugene V. Harin, Philipp V. Kiryukhantsev-Korneev, Galina S. Usmanova and Olga M. Zhigalina
Materials 2022, 15(1), 137; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15010137 - 25 Dec 2021
Cited by 1 | Viewed by 2351
Abstract
The paper presents results of investigation of Fe65.3–100Zr34.7–0N7.5–0 films prepared by dc magnetron deposition on glass substrates and subsequent 1-hour annealing at temperatures of 300–600 °C. The influence of the chemical and phase compositions and structure of the [...] Read more.
The paper presents results of investigation of Fe65.3–100Zr34.7–0N7.5–0 films prepared by dc magnetron deposition on glass substrates and subsequent 1-hour annealing at temperatures of 300–600 °C. The influence of the chemical and phase compositions and structure of the films, which were studied by TEM, SEM, XRD, and GDOES, on their mechanical properties determined by nanoindentation and static magnetic properties measured by VSM method is analyzed. The studied films exhibit the hardness within a range of 14–21 GPa, low elastic modulus (the value can reach 156 Gpa), and an elastic recovery of 55–83%. It was shown that the films are strong ferromagnets with the high saturation induction Bs (up to 2.1 T) and low coercive field Hc (as low as 40 A/m). The correlations between the magnetic and mechanical properties, on one hand, and the chemical composition of the films, their phase, and structural states as well, on the other hand, are discussed. Full article
(This article belongs to the Special Issue New Advances in Magnetic Materials for Power Electronics Applications)
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18 pages, 6149 KiB  
Article
Structure of Alloys for (Sm,Zr)(Co,Cu,Fe)z Permanent Magnets: III. Matrix and Phases of the High-Coercivity State
by Andrey G. Dormidontov, Natalia B. Kolchugina, Nikolay A. Dormidontov, Mark V. Zheleznyi, Anna S. Bakulina, Pavel A. Prokofev, Aleksandr S. Andreenko, Yury V. Milov and Nikolay N. Sysoev
Materials 2021, 14(24), 7762; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14247762 - 15 Dec 2021
Cited by 3 | Viewed by 1696
Abstract
Observations of the surface domain structure (Kerr-effect), optical metallography, scanning electron microscopy (SEM-SE), and electron microprobe analysis (EPMA-SEM), measurements of major and minor magnetic hysteretic loops were used to study pseudo-single-crystal samples of (Sm,Zr)(Co,Cu,Fe)z alloys subjected to heat treatments to the high-coercivity [...] Read more.
Observations of the surface domain structure (Kerr-effect), optical metallography, scanning electron microscopy (SEM-SE), and electron microprobe analysis (EPMA-SEM), measurements of major and minor magnetic hysteretic loops were used to study pseudo-single-crystal samples of (Sm,Zr)(Co,Cu,Fe)z alloys subjected to heat treatments to the high-coercivity state, which are used in fabricating sintered permanent magnets. Correlations between the chemical composition, hysteretic properties, structural components, domain structure, and phase state were determined for the concentration ranges that ensure wide variations of 4f-/4d-/3d-element ratio in the studied samples. The phase state formed by collinear and coherent phase components determines the high coercive force and ultimate magnetic hysteresis loops of the pseudo-single crystals. It was found that the 1:5 phase with the hexagonal structure (P6/mmm) is the matrix of the alloys for (Sm,Zr)(Co,Cu,Fe)z permanent magnets; the matrix undergoes phase transformations in the course of all heat treatments for the high-coercivity state. The heterogeneity observed with optical magnifications, namely, the observation of main structural components A and B, is due to the alternation, within the common matrix, of regions with modulated quasi-spherical precipitates and regions with hexagonal bipyramids (cellular phase) although, traditionally, many investigators consider the cellular phase as the matrix. It is shown that the relationship of volume fractions of structural components A and B that account for more than 0.9 volume fraction of the total, which is due to the integral chemical composition of the alloys, determines the main hysteretic performances of the samples. The Zr-rich phases, such as 5:19, 2:7, and 6:23, and a structural component with the variable stoichiometry (Sm(Co,Cu,Fe)3.5–5) that is almost free of Zr and contains up to 33 at% Cu, were found only within structural component A in quantities sufficient for EPMA analysis. Full article
(This article belongs to the Special Issue New Advances in Magnetic Materials for Power Electronics Applications)
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