Effect of Organic Fuel on High-Frequency Magnetic Properties of Fe–Al<sub>2</sub>O<sub>3</sub> Composite Powders Synthesized by a Combustion Method

Choi, Donchul; Choi, Moosung; Kim, Jongryoul

doi:10.1109/tmag.2015.2441115

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…On the one hand, the parasitic components are expected as small as possible, making the system absent of their influence; On the other hand, the parasitic components may be taken as the resonant components in power circuits. Thus, a deep evaluation of semiconductor devices is performed in this paper [17][18][19][20][21][22][23][24]. Another challenge for the VHF converter is magnetic components, which lead to a large part of system volume.…”

Section: Introductionmentioning

confidence: 99%

Review of very high frequency power converters and related technologies

Wang

Lucía

Zhang

et al. 2020

IET Power Electronics

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With the increasing demand for volume reduction and efficiency improvement, very high frequency (VHF) power converters (30-300 MHz) have attracted great interest. Under such high operating frequency conditions, the value and volume of passive components can be greatly reduced, and the power density can be improved. However, many concerns and challenges accompany the increasing operating frequency, such as high switching loss, high magnetic components loss and high driving circuit loss. Including various topologies of the VHF converter, this study reviews the state-of-the-art technology involved in the VHF power converter, also encompassing the inverter stage and matching network stage. Secondly, different magnetic components and semiconductor devices were evaluated under the VHF operating condition. Thirdly, the highefficiency driving methods, such as the resonant driving method and self-resonant driving method, were demonstrated. A guideline for converter design and system optimisation of the VHF converter and related technologies, including all components and systems, is illustrated in this study. Finally, the future research hot spots and challenges have been pointed out as guidance for further advanced VHF power conversion techniques. It is noteworthy that in the VHF condition, the needed passive resonant components have a quite small value, thus, the parasitic capacitive and inductive components of semiconductor devices and their layout must be carefully considered. On the one hand, the parasitic components are expected as small as possible, making the system absent of their influence; On the other hand, the parasitic components may be taken as the resonant components in power circuits. Thus, a deep evaluation of semiconductor devices is performed in this paper [17-24]. Another challenge for the VHF converter is magnetic components, which lead to a large part of system volume. There are two choices for high-frequency inductors or transformers, i.e. with a magnetic core and without magnetic core (air core). With the help of the magnetic core, the volume can be greatly reduced compared with the air core one under the same inductance in ideal condition, as well as the magnetic field can be well controlled. However, the loss and thermal performance must be taken into consideration. Thus, this paper provides a deep comparison as guidance for magnetic component selection under VHF conditions [25-31]. Besides the perspectives of topology and component selection, in VHF conditions, the system efficiency is also significantly affected by driving loss. In the square-waveform driving method, the switch turns on and turns off by charging and discharging input capacitors during every cycle. However, the energy of the switch input capacitor is totally dissipated. Thus, the driving loss goes to a relatively high level with the increment of operating frequency, especially when it reaches tens of MHz. To solve this problem, advanced driving methods, such as the resonant driving method and the self-resonant driving method are...

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Section: Introductionmentioning

confidence: 99%

Review of very high frequency power converters and related technologies

Wang

Lucía

Zhang

et al. 2020

IET Power Electronics

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Synthesis, characterisation and potential biomedical applications of magnetic core–shell structures: carbon‐, dextran‐, SiO ₂ ‐ and ZnO‐coated Fe ₃ O ₄ nanoparticles

Boustani

Shayesteh

Salouti

et al. 2017

IET nanobiotechnol.

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Due to the strong effect of nanoparticles' size and surface properties on cellular uptake and bio-distribution, the selection of coating material for magnetic core-shell nanoparticles (CSNPs) is very important. In this study, the effects of four different biocompatible coating materials on the physical properties of Fe 3 O 4 (magnetite) nanoparticles (NPs) for different biomedical applications are investigated and compared. In this regard, magnetite NPs are prepared by a simple co-precipitation method. Then, CSNPs including Fe 3 O 4 as a core and carbon, dextran, ZnO (zincite) and SiO 2 (silica) as different shells are synthesised using simple one-or two-step methods. A comprehensive study is carried out on the prepared samples using X-ray diffraction, vibrating sample magnetometry, transmission electron microscopy and Fourier transform infrared spectroscopy analyses. According to the authors' findings, it is suggested that carbon-and dextran-coated magnetite NPs with high M s have great potential in the application of magnetic resonance imaging contrast agents. Moreover, silica-coated magnetite NPs with high coercivity are potentially suitable candidates for hyperthermia and ZnO-coated Fe 3 O 4 is potentially suitable for photothermal therapy.

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Enhanced Magnetic Properties of Hot-Pressed Fe-Based Nanocrystalline Powder Cores With Low-Melted Glass-Modified Insulating

Cao

Liu

et al. 2021

IEEE Trans. Magn.

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Effect of Organic Fuel on High-Frequency Magnetic Properties of Fe–Al₂O₃ Composite Powders Synthesized by a Combustion Method

Cited by 3 publications

References 12 publications

Review of very high frequency power converters and related technologies

Review of very high frequency power converters and related technologies

Synthesis, characterisation and potential biomedical applications of magnetic core–shell structures: carbon‐, dextran‐, SiO ₂ ‐ and ZnO‐coated Fe ₃ O ₄ nanoparticles

Enhanced Magnetic Properties of Hot-Pressed Fe-Based Nanocrystalline Powder Cores With Low-Melted Glass-Modified Insulating

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Effect of Organic Fuel on High-Frequency Magnetic Properties of Fe–Al2O3 Composite Powders Synthesized by a Combustion Method

Cited by 3 publications

References 12 publications

Review of very high frequency power converters and related technologies

Review of very high frequency power converters and related technologies

Synthesis, characterisation and potential biomedical applications of magnetic core–shell structures: carbon‐, dextran‐, SiO 2 ‐ and ZnO‐coated Fe 3 O 4 nanoparticles

Enhanced Magnetic Properties of Hot-Pressed Fe-Based Nanocrystalline Powder Cores With Low-Melted Glass-Modified Insulating

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Product

Resources

About

Effect of Organic Fuel on High-Frequency Magnetic Properties of Fe–Al₂O₃ Composite Powders Synthesized by a Combustion Method

Synthesis, characterisation and potential biomedical applications of magnetic core–shell structures: carbon‐, dextran‐, SiO ₂ ‐ and ZnO‐coated Fe ₃ O ₄ nanoparticles