Modeling, Magnetic Design, Simulation Methods, and Experimental Evaluation of Various Powder Cores Used in Power Converters Considering Their DC Superimposition Characteristics

Imaoka, Jun; Okamoto, Ken‐ichi; Shoyama, Masahito; Ishikura, Yuki; Noah, Mostafa; Yamamoto, Masaaki

doi:10.1109/tpel.2018.2886044

Cited by 52 publications

(32 citation statements)

References 33 publications

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“…One of the most attractive characteristics of powder cores is the relative permeability variation according to the magnetic field intensity. In addition, those have the following characteristics [36]: 1) High magnetic saturation point: this property allows windings endure high current levels reducing the size of cores and handling great power. In this kind of cores, the saturation flux is generally high (around to 1.5 T) [36].…”

Section: B Powder Coresmentioning

confidence: 99%

“…In addition, those have the following characteristics [36]: 1) High magnetic saturation point: this property allows windings endure high current levels reducing the size of cores and handling great power. In this kind of cores, the saturation flux is generally high (around to 1.5 T) [36]. 2) High Curie temperature: the powder core Curie temperature is between a range of 400 ∼ 700 • C [36], [68].…”

Section: B Powder Coresmentioning

confidence: 99%

“…In this kind of cores, the saturation flux is generally high (around to 1.5 T) [36]. 2) High Curie temperature: the powder core Curie temperature is between a range of 400 ∼ 700 • C [36], [68]. 3) Highly flexible magnetic structure: the manufacturing process of powder cores consists in spreading a dough all over a preformed mold, apply pression to compact the material and leave it in an only piece, this allows powder cores have many different geometric forms.…”

Section: B Powder Coresmentioning

confidence: 99%

“…It is necessary to mention that advances in ferrite cores are growing, in these day researchers are working in order to improve their magnetics properties with different types of alloys and materials. The reader interested in ferrite cores can read relevant information about the in [29]- [36].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Advanced Ferromagnetic Materials in Power Electronic Converters: A State of the Art

et al. 2020

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Currently, the design of power electronic converters (PECs) is in a stage which looks increasing its efficiency and reducing its dimensions from basic topologies through precise analysis of losses in each device that conforms. Although there have been important advances to improve the active components of PECs, passive components, particularly inductors, have changed very little since several decades ago, and those begin a limiting factor, when a high efficiency at very high power and switching frequency, are required. It is for the foregoing that this paper reviews new ferromagnetic materials to construct inductors and achieve a substantial increasing in efficiency through magnetic permeability and hysteresis improvements. Therefore, the main objective of this work is to position the reader in the state of the art of advanced ferromagnetic materials used in PECs. Details about how they are constructed and qualitative comparison of their dynamic behavior are provided. Also, estimation methods of energy losses, applications for different types of material, and its influence on the performance of some basic PECs are presented. INDEX TERMS Amorphous magnetic materials, magnetic materials, power conversion, soft magnetic materials.

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Section: B Powder Coresmentioning

confidence: 99%

Section: B Powder Coresmentioning

confidence: 99%

Section: B Powder Coresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advanced Ferromagnetic Materials in Power Electronic Converters: A State of the Art

et al. 2020

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“…The powder cores with distributed air gaps inherently have low permeabilities without using multiple pieces of cores to create discrete airgaps for high DC bias current [12]. Generally, air gaps need to be added in ferrite core based inductors to reduce the effective permeability of the core and then to reduce the flux density [13], which will induce additional power loss due to fringing flux around air gaps and the complexity of the inductor structure and design [14]. In order to achieve adjustable permeability, higher saturation flux density and lower core loss at the high operating frequencies, the soft magnetic composites (SMCs), also known as soft magnetic powder cores, have become increasingly popular based on well-developed powder metallurgy [15].…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline Powder Cores for High-Power High-Frequency Applications

Jiang

Ghosh

et al. 2020

IEEE Trans. Power Electron.

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Soft magnetic composites (SMCs) based magnetic cores are attractive in high frequency inductor design. The desired overall core permeability of SMC core can be achieved by adjusting the powder size, addition of insulation material and phosphoric acid, and pressure during the preparation process to reduce the air gap loss and ease the inductor design. The nanocrystalline alloy (Fe-Cu-Nb-Si-B) is an emerging SMC with high saturation flux density and low hysteresis loss, showing potential suitability for SMC based magnetic cores. To date, nanocrystalline alloys are mostly used in form of laminated ribbon for magnetic cores and nanocrystalline powder SMCs have been seldom used in practice. Also, neither experimental validation nor comparison with other commercialized and commonly used SMC cores has been reported. In this paper, the structure and manufacturing process of nanocrystalline powder cores are introduced. The calculation of core loss is defined for the nanocrystalline powder core. The characteristics and performance of the nanocrystalline powder toroidal core are compared with those of existing commercial SMC cores such as Fe-Si powder (X flux), Fe-Ni powder (High flux), Fe-Si-Al powder (Kool Mµ), Fe-Ni-Mo powder (MPP). Experimental results are conducted at frequencies from 100 kHz to 600 kHz to verify the loss calculation and feasibility of this new nanocrystalline powder core.

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Nacre‐Inspired, Efficient, and Multifunctional Soft Magnetic Composites by Cold Sintering Design

Zhou

Liu

et al. 2022

Adv Eng Mater

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Nacre‐mimetics hold great promise as integration of structure and function. Various techniques have been proposed to prepare nacre‐inspired materials, but in most cases, organic materials are usually used that decrease high‐temperature stability. Factually, efficient synthesis of nacre‐like high‐performance soft magnetic composites (SMCs) with good thermal stability is still challenging. Herein, a novel and simple strategy is reported on designing nacre‐like SMCs by cold sintering of ferrite‐coated alloy flakes with the absence of polymers. By selecting NH4HCO3 aqueous solution as transport solvent, a highly ordered nacre‐like structure and enhanced densification with large electrical resistivities and strong interfacial bonding are successfully achieved, which are superior to the cold‐sintered composites using water as transport solvent as well as the hot‐pressed composites based on alloy flakes and epoxy resin. The resultant composites illustrate large density (≈6.286 g cm−3) and electrical resistivity (≈3.9 × 105 Ω cm), allowing remarkable flexural strength (≈46.5 MPa), high permeability (μ′ = ≈107.3 at f = 10 MHz), together with low tanδ μ (≈0.09 at f = 10 MHz) and P cv (≈183.6 kW m−3 at 50 mT/100 kHz), which show great potential in high‐frequency power electronic and electrical systems. The synthesis strategy sheds light on designing other nacre‐like materials or developing new metal−ceramic composites.

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Modeling, Magnetic Design, Simulation Methods, and Experimental Evaluation of Various Powder Cores Used in Power Converters Considering Their DC Superimposition Characteristics

Cited by 52 publications

References 33 publications

Advanced Ferromagnetic Materials in Power Electronic Converters: A State of the Art

Advanced Ferromagnetic Materials in Power Electronic Converters: A State of the Art

Nanocrystalline Powder Cores for High-Power High-Frequency Applications

Nacre‐Inspired, Efficient, and Multifunctional Soft Magnetic Composites by Cold Sintering Design

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