Analysis on Common to Differential Mode Conversion Within Automotive Communication Systems

Austermann, Carina; Frei, Stephan

doi:10.1109/emc/si/pi/emceurope52599.2021.9559381

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Asymmetries along a differential path constitute a vulnerability point both in terms of emission and immunity due to noise mode conversion; as an example, the disturbance Asymmetries along a differential path constitute a vulnerability point both in terms of emission and immunity due to noise mode conversion; as an example, the disturbance induced by an ESD event could be coupled from the ground to a differential signal path due to CM-to-DM conversion caused by asymmetries. As reported in [26,27], potential sources of asymmetries can be the stray inductance of the CMC (from 10 nH to 300 nH) and 60 Ω termination resistor values. Asymmetries could also be determined by PCB lay-out.…”

Section: Countermeasures Against Conducted Disturbances On Can Commun...mentioning

confidence: 96%

“…induced by an ESD event could be coupled from the ground to a differential signal path due to CM-to-DM conversion caused by asymmetries. As reported in [26,27], potential sources of asymmetries can be the stray inductance of the CMC (from 10 nH to 300 nH) and 60 Ω termination resistor values. Asymmetries could also be determined by PCB layout.…”

Section: Countermeasures Against Conducted Disturbances On Can Commun...mentioning

confidence: 96%

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Overview about E-Mobility Conducted Immunity Tests on ESA Communication Lines

et al. 2023

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Due to the complexity of the Automotive Electromagnetic Compatibility legislation in force, this article aims to describe a simplified overview of several technical standards relating to conducted immunity tests on electronic sub-assemblies, where communication lines are involved. The discussed automotive standards reported in this article are: ISO 11452-1 and ISO 11452-4 for continuous narrowband electromagnetic fields immunity test, bulk current injection and tubular wave coupler, IEC 61000-4-5 for immunity against surge events, IEC 61000-4-4 for electrical fast transient/burst events immunity, ISO 10605 for electrostatic discharge events immunity, ISO 7637-2 and ISO 7637-3 for transient disturbances events immunity. For each cited standard, disturbance bandwidth evaluation was performed. Practical examples are reported, with analysis and discussion of some of the adoptable disturbance countermeasures applicable on controlled area network communication lines, and possible design advantages and disadvantages with different types of filtering and suppression circuit solutions.

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Section: Countermeasures Against Conducted Disturbances On Can Commun...mentioning

confidence: 96%

Section: Countermeasures Against Conducted Disturbances On Can Commun...mentioning

confidence: 96%

Overview about E-Mobility Conducted Immunity Tests on ESA Communication Lines

et al. 2023

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“…Although field coupling to TWPs [50] mainly induces CM noise, non-negligible DM noise can be generated by the udesired mode conversion introduced by TWP imbalance [51] and terminal imbalance [50]. [52] investigates mode conversion in automotive cable systems and compares the mode conversion due to unbalanced TWPs and terminals. Another example of noise generation due to CM-to-DM conversion is BCI test, in which if the BCI probe is clamped on a cable harness, CM noise is intentionally injected in the cable system for immunity test.…”

Section: A Wiring Structuresmentioning

confidence: 99%

Review of Mode Conversion and Modal Analysis in Electromagnetic Compatibility

Illiano,

Wu,

Grassi

et al. 2024

IEEE Access

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Undesired conversion between common-mode (CM) and differential-mode (DM) noise often occurs in modern electronic and electrical systems, posing challenges in terms of Electromagnetic Compatibility (EMC). Modal analysis represents a crucial tool in EMC investigation and provides insight into the mechanism underlying mode conversion. By inspecting CM and DM behaviors and their interconversion, it allows for understanding of conducted emission propagation mechanisms, drives electromagnetic interference (EMI) filter design towards optimal/tailored solutions, and enables the possibility to identify the main contributors to the radiated emission phenomenon. This paper offers a comprehensive review of mathematical methodologies and modelling strategies for EMC-oriented modal analysis, with particular emphasis on mode conversion phenomena. To this end, modal decomposition techniques and standard parameters for quantifying mode conversion are summarized and compared. Additionally, the paper provides an overview and in-depth discussion of different scenarios and test cases in which mode conversion occurs, with the final goal to achieve a systematic comprehension of its root causes and consequences within power and communication systems. Eventually, a survey of circuit modelling approaches for mode conversion is presented, offering insights into addressing this phenomenon effectively.

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