Inductively Coupled In-Circuit Impedance Measurement and Its EMC Applications

Fei, Fan; Jie, Huamin; Sun, Quqin; Tu, Peng‐Fei; Wang, Wensong; See, Kye Yak

doi:10.48550/arxiv.2204.01546

Cited by 1 publication

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“…The voltages V1 and V2 in (22), and V1 in (23) involved in these expressions can be evaluated by combining the filter ABCD-parameter representation, relating voltages and currents at the filter ports, i.e., Modal ILs can be therefore cast as follows:…”

Section: Definition Of Cm/dm Il Of Three-phase Filtersmentioning

confidence: 99%

“…The first implementation made use of two probes and was proposed for measuring power line in-circuit impedances [22]. Further applications of such a method were presented in [23,24]. A more recent implementation [25] foresees the use of one instead of two probes, with the advantage of, besides requiring less instrumentation, eliminating possible issues due to mutual coupling between the two probes.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Impedance Measurement to Predict Electromagnetic Interference Attenuation Provided by EMI Filters in Systems with AC/DC Converters

et al. 2022

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Due to the widespread integration of renewable energy sources connected to AC and DC power systems by means of power electronics converters, electromagnetic noise propagates along lines, and metallic earth-return structures. EMI filters are commonly used to mitigate the common mode and differential mode noise at the interface of distribution lines, and their suppression characteristics are usually assessed in standard test setups, the impedances of which are, however, scarcely representative of real-world applications. In this paper, an online, inductively coupled impedance measurement method is proposed. A sensitivity analysis to highlight the benefits of the proposed setup and experimental verification is performed. The proposed method enables non-intrusive impedance measurement in energized systems, including power converters. These measures, in turn, allow the evaluation of modal insertion losses of EMI filters in real-world operating conditions. The three-phase example considered in this study shows significant deviations from manufacturer specifications, thus justifying the need for more advanced estimation techniques.

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Section: Definition Of Cm/dm Il Of Three-phase Filtersmentioning

confidence: 99%