Application of Frequency-Domain Noise-Source Model to Simulation of Time-Synchronized Near-Magnetic-Field Distribution above a Power Circuit

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-01-01 DOI:10.1541/ieejjia.23005684

Keita Takahashi, Takaaki Ibuchi, Tsuyoshi Funaki

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Abstract

The high-electromagnetic-interference (EMI)-noise area in a power circuit should be clarified when designing a low-EMI-noise power converter. For example, shielding of the power circuit prevents the EMI noise propagation to other circuits via near field couplings. It is important to know the high-EMI-noise area which should be shielded. The EMI noise distribution can be visualized by measuring the near-magnetic-field distribution above the power circuit. However, we cannot measure the near-magnetic-field distribution if there is not enough space for scanning a magnetic field probe between the power circuit and other circuits. Therefore, we propose to adopt a three-dimensional electromagnetic simulation for acquiring the near-magnetic-field distribution above a power circuit. In this paper, we study the validity of the frequency-domain noise-source model for the simulation of the near-magnetic field distribution. We evaluate the near-magnetic-field distribution maps for turn-on and turn-off of the transistor, respectively. The high-EMI-noise area differs depending on frequencies. The high-EMI-noise area for turn-on is different from that for turn-off. We have clarified that each high-EMI-noise area can be predicted by the simulation.

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频域噪声源模型在电源电路上时间同步近磁场分布仿真中的应用

在设计低噪声电源变换器时，应明确电源电路中的高电磁干扰噪声区域。例如，电源电路的屏蔽可以防止EMI噪声通过近场耦合传播到其他电路。了解应该屏蔽的高emi噪声区域是很重要的。通过测量电源电路上方的近磁场分布，可以直观地看到电磁干扰噪声的分布。然而，如果在电源电路和其他电路之间没有足够的空间扫描磁场探针，我们就无法测量近磁场分布。因此，我们建议采用三维电磁模拟来获取电源电路上方的近磁场分布。本文研究了用频域噪声源模型模拟近磁场分布的有效性。我们分别评估了晶体管导通和关断时的近磁场分布图。高emi噪声区域因频率不同而不同。打开时的高emi噪声区域不同于关闭时的高emi噪声区域。我们已经阐明，每个高emi噪声区域可以通过模拟预测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.