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首页> 外文期刊>Applied Computational Electromagnetics Society journal >A Method-of-Moments Model for Determination of Radiated Magnetic Field from Switch-Mode Power Supplies Components using Near-Field Measurement Data
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A Method-of-Moments Model for Determination of Radiated Magnetic Field from Switch-Mode Power Supplies Components using Near-Field Measurement Data

机译：使用近场测量数据确定开关模式电源组件辐射磁场的矩量模型

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摘要

Electromagnetic interference due to switching-mode power supplies (SMPSs) is a great concern for the designers of electrical and electronic equipment. In this paper, we propose a method-of-moments model for efficient determination of radiated magnetic field due to SMPSs mounted on printed circuit boards (PCBs). This model involves three stages. First, the magnetic field distribution on a given rectangular plan in the vicinity of the board is measured. The measured data are then used to identify the equivalent source currents on the surface of the radiating board by the method-of-moments. Having determined the radiating sources, the magnetic field distribution at a desired distance from the PCB can be computed. The main feature of the proposed model is its direct approach for reconstruction of the radiating current sources, which makes it much faster than the conventional techniques, involving heuristic optimization algorithms. The validity of the proposed technique is demonstrated by comparing the actual and predicted far-field magnetic field radiations due to a small electrical loop, a high frequency inductor as a typical radiating magnetic field component of SMPSs, and a microstrip transmission line, which simulating conduction paths on the PCB.
机译：开关模式电源（SMPS）引起的电磁干扰是电气和电子设备设计人员的极大关注。在本文中，我们提出了一种矩量法模型，用于有效确定安装在印刷电路板（PCB）上的SMPS引起的辐射磁场。该模型涉及三个阶段。首先，测量板附近给定矩形平面上的磁场分布。然后，通过矩量法将测量数据用于识别辐射板表面上的等效源电流。确定了辐射源之后，可以计算出距PCB所需距离的磁场分布。所提出模型的主要特征是其直接构建辐射电流源的方法，这使其比涉及启发式优化算法的常规技术要快得多。通过比较由于小电回路，作为SMPSs典型辐射磁场分量的高频电感器和模拟传导的微带传输线而产生的实际和预测的远场磁场辐射，证明了所提出技术的有效性。 PCB上的路径。

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