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New Measurement System of Magnetic Near-Field With Multipolar Expansion Approach

机译：磁近场多极扩展新测量系统

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摘要

In the electromagnetic compatibility (EMC) behavior of power electronic converters, it is important to predict the near-field coupling between the complex components (e.g., in EMC filter). Using the components of the near-field multipolar expansion of electromagnetic sources, the close magnetic coupling between two elements is determined from their equivalent model. In this paper, a new measurement system, based on spherical harmonics and spatial filtering, is proposed and studied. The sensor is a single coil moving along one axis, and coupled with a rotatable mount for the measured source with two axes of rotation and . This simple system, which can be easily automated, allows building good accuracy models for complex sources. The impact of the uncertainties in the position and orientation of the source and sensor is studied in order to determine the higher degree of the multipolar expansion that can be characterized. Taken into account these uncertainties and the expected precision of the reconstructed source, strategies of measurement minimizing the number of measurements are compared.
机译：在电力电子转换器的电磁兼容性（EMC）行为中，重要的是预测复杂组件之间的近场耦合（例如，在EMC滤波器中）。使用电磁源的近场多极扩展的组件，从两个元素之间的等效模型确定它们之间的紧密磁耦合。本文提出并研究了一种基于球谐函数和空间滤波的新型测量系统。该传感器是一个沿一个轴运动的单个线圈，并与一个用于旋转和旋转的测量源的可旋转底座耦合。这个简单的系统可以轻松实现自动化，可以为复杂的数据源建立良好的精度模型。为了确定可以表征的更高的多极膨胀程度，研究了源和传感器的位置和方向不确定性的影响。考虑到这些不确定性和重构源的预期精度，比较了使测量次数最小化的测量策略。

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