Design of a Wide-Input-Voltage PCB-Embedded Transformer Based Active-Clamp Flyback Converter Considering Permeability Degradation

Hu, Jiewen; Wen, Bo; Burgos, Rolando; Kang, Yonghan

doi:10.1109/tpel.2021.3064536

Cited by 17 publications

(4 citation statements)

References 17 publications

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“…To compute the real and imaginary parts of the magnetic spectra, their expressions were derived from Equation ( 1), as shown in Equations ( 2) and (3).…”

Section: (µM)mentioning

confidence: 99%

“…In the current landscape of power electronics, shaped by the rapid proliferation of 5G technology and the surge in new energy vehicles, there is a profound shift towards high power and a compact design in power-related products [1][2][3][4]. This shift prominently features in switch-mode power supplies and communication energy storage systems [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Contribution of Magnetization Mechanisms in MnZn Ferrites with Different Grain Sizes and Sintering Densification

Liu,

Liao,

et al. 2024

Coatings

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This study investigates the magnetization mechanisms in MnZn ferrites, which are key materials in high-frequency power electronics, to understand their behavior under various sintering conditions. Employing X-ray diffraction and scanning electron microscopy, we analyzed the microstructure and phase purity of ferrites sintered at different temperatures. Our findings confirm consistent spinel structures and highlight significant grain-growth and densification variabilities. Magnetic properties, particularly the saturation magnetization (Ms) and initial permeability (μi), were explored, revealing their direct correlation with the sintering process. The decomposition of magnetic spectra into domain-wall-motion and spin-rotation components offered insights into the dominant magnetization mechanisms, with the domain wall movement becoming increasingly significant at higher sintering temperatures. The samples sintered at 1310 °C showcased superior permeability and the least loss in our investigations. This research underscores the impact of sintering conditions on the magnetic behavior of MnZn ferrites, providing valuable guidelines for optimizing their magnetic performance in advanced electronic applications and contributing to the material science field’s understanding of the interplay between sintering, microstructures, and magnetic properties.

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“…To compute the real and imaginary parts of the magnetic spectra, their expressions were derived from Equation ( 1), as shown in Equations ( 2) and (3).…”

Section: (µM)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Contribution of Magnetization Mechanisms in MnZn Ferrites with Different Grain Sizes and Sintering Densification

Liu,

Liao,

et al. 2024

Coatings

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show abstract

“…MnZn ferrites are commonly used as magnetic core material and widely used in power devices such as converters and switching power supplies 1–4 . With the rapid progress of semiconductor technology, especially the emergence of wide band gap semiconductor materials, high application frequency has become an inevitable development trend of switching power supply devices, which can promote the miniaturization and lightweight of power conversion devices 5,6 .…”

Section: Introductionmentioning

confidence: 99%

“…MnZn ferrites are commonly used as magnetic core material and widely used in power devices such as converters and switching power supplies. [1][2][3][4] With the rapid progress of semiconductor technology, especially the emergence of wide band gap semiconductor materials, high application frequency has become an inevitable development trend of switching power supply devices, which can promote the miniaturization and lightweight of power conversion devices. 5,6 But for the magnetic core, the increased frequency is also a huge burden, because the high frequency will cause the core losses of the magnetic core to increase sharply, according to the Steinmetz equation.…”

Section: Introductionmentioning

confidence: 99%

Effects of magnetic domain morphology on the magnetic spectrum and high‐frequency core losses of MnZn ferrites

Wu,

Yu,

Guo

et al. 2023

J Am Ceram Soc.

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MnZn ferrites that exhibit low core losses at high frequencies are suitable for the integration and miniaturization of power conversion devices. To obtain low core losses at high frequencies, it is important to understand the underlying mechanism. In this work, MnZn ferrites with various grain sizes were produced by changing the sintering temperature. The relationship between domain morphology, dynamic magnetization behavior, and core losses at high frequencies was carefully investigated. As the average grain size approached the critical size of single‐domain state, the contribution of domain wall displacement to complex permeability decreased, while domain wall resonant frequency improved significantly, resulting in the suppression of residual loss at 3 MHz. As the average grain size increased, the domain morphology changed from a single‐domain state to a multidomain state, which increased the initial permeability and decreased hysteresis loss. However, the number of domain walls increased, causing a significant decrease in the domain wall resonant frequency, and resulting in a sharp increase in residual loss. These results provide valuable insights into reducing high‐frequency core losses in MnZn ferrites by domain engineering.

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The formation mechanism of MnZn ferrite by the CTAB-assisted synthesis

Xu,

Zhao,

Bai

et al. 2024

J Mater Sci

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Design of a Wide-Input-Voltage PCB-Embedded Transformer Based Active-Clamp Flyback Converter Considering Permeability Degradation

Cited by 17 publications

References 17 publications

Contribution of Magnetization Mechanisms in MnZn Ferrites with Different Grain Sizes and Sintering Densification

Contribution of Magnetization Mechanisms in MnZn Ferrites with Different Grain Sizes and Sintering Densification

Effects of magnetic domain morphology on the magnetic spectrum and high‐frequency core losses of MnZn ferrites

The formation mechanism of MnZn ferrite by the CTAB-assisted synthesis

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