Grain boundary engineering of power inductor cores for MHz applications

Andalib, Parisa; Harris, Vincent G.

doi:10.1016/j.jallcom.2019.153131

Cited by 20 publications

(20 citation statements)

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“…Soft ferrites are essential materials in power electronic devices (such as AC–DC converters, DC–DC converters, transformers, and inverters) that are widely used to generate, condition, and convert power. In recent years, power electronic devices have been driven toward high frequency, high efficiency, miniaturization, and integration 1–6 . Third‐generation wide‐band‐gap (WBG) semiconductors (such as SiC and GaN) are being used to push the operation of power electronic devices into the MHz frequency range 6, 7 .…”

Section: Introductionmentioning

confidence: 99%

“…However, a substantially low saturation flux density ( B s ) and permeability make NiZn ferrites unsuitable for power devices 6 . MnZn ferrites possess a high permeability, high B s , and low power loss ( P cv ) and have therefore been extensively used as core materials in power electronic devices at working frequencies ranging from 1 kHz to 1 MHz 6 . However, P cv in MnZn ferrites increases drastically as the working frequency increases to the MHz range.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the incorporation of these additives deteriorates the initial permeability ( μ i ), which is another important performance parameter for MnZn ferrites 12, 14 . Recently, Andalib et al 6, 15 . investigated the effect of the addition of magnetic and highly insulating YIG nanoparticles on the magnetic properties of MnZn ferrites.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, power electronic devices have been driven toward high frequency, high efficiency, miniaturization, and integration. [1][2][3][4][5][6] Thirdgeneration wide-band-gap (WBG) semiconductors (such as SiC and GaN) are being used to push the operation of power electronic devices into the MHz frequency range. 6,7 MnZn and NiZn ferrites are the two most common commercial soft ferrites.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6] Thirdgeneration wide-band-gap (WBG) semiconductors (such as SiC and GaN) are being used to push the operation of power electronic devices into the MHz frequency range. 6,7 MnZn and NiZn ferrites are the two most common commercial soft ferrites. NiZn ferrites are traditionally used for MHz applications.…”

Section: Introductionmentioning

confidence: 99%

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Effect of a YIG nanoparticle additive on the magnetic properties of MnZn ferrites for MHz frequency applications

Ying

Feng

et al. 2022

J Am Ceram Soc.

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In this study, MnZn ferrites with added YIG nanoparticles were developed for MHz frequency applications. The effect of the magnetic YIG additive on the power loss, initial permeability, and cutoff frequency of MnZn ferrites was investigated. A small quantity of added YIG effectively reduces the power loss and concurrently increases the initial permeability. Compared to the results for the MnZn ferrite with no added YIG, the optimal MnZn ferrite with 600 ppm added YIG exhibits a reduction in the power loss at 25°C of 56.4% and 36.6% at 1 MHz/50 mT and 3 MHz/10 mT, respectively, and a 13.9% increase in the initial permeability. This sample also exhibits a good stability of the power loss against temperature. The power loss remains below 205 kW/m3 over temperatures ranging from 25 to 140°C. The effect mechanism of YIG addition on the magnetic properties of MnZn ferrites was studied. An analysis based on the equivalent circuit model showed that the reduction in the eddy current loss and power loss mainly results from the increase in the grain boundary resistance caused by the addition of highly resistive YIG.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%