Wideband loss separation model of nanocrystalline materials considering microscopic magnetization mechanism

The core loss directly determines the performance of high-frequency transformers. This paper presents an enhanced method for calculating core losses by integrating the LLG equation and Maxwell's diffusion equation. By the method, the losses caused by the rotation of the magnetic moment can be o...

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Bibliographic Details
Published in:AIP advances 2024-01, Vol.14 (1), p.015231-015231-5
Main Authors: Zhou, Jiapeng, Li, Yongjian, Zhang, Changgeng
Format: Article
Language:English
Subjects:
Core loss
Domain walls
Magnetic domains
Magnetic moments
Model accuracy
Rotation
Separation
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Summary:The core loss directly determines the performance of high-frequency transformers. This paper presents an enhanced method for calculating core losses by integrating the LLG equation and Maxwell's diffusion equation. By the method, the losses caused by the rotation of the magnetic moment can be obtained. The loss attributed to domain wall displacement is derived from the total loss by subtracting losses due to magnetic moment rotation, further categorized into the hysteresis loss and the residual loss. The observation of the dynamic variation of nanocrystalline magnetic domains with applied excitation verifies the feasibility of the improved method. Finally, the causes of residual loss generation are also analyzed the model accuracy is verified by comparing the measured and modelled values and the traditional loss separation model.
ISSN:2158-3226
2158-3226
DOI:10.1063/9.0000643