Modeling and Reduction of Radiated EMI in a GaN IC-Based Active Clamp Flyback Adapter

Yao, Juntao; Li, Yiming; Wang, Shuo; Huang, Xiucheng; Lyu, Xianjun

doi:10.1109/tpel.2020.3032644

Cited by 42 publications

(17 citation statements)

References 24 publications

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“…Externally coupled EMC difficulties are developed when the ICs electromagnetic noise upsets off-chip devices or circuits, or when electromagnetic commotion from other devices disrupts the ICs operation. Conducted coupling, electric field coupling, magnetic field coupling, and radiated field coupling are all examples of externally coupled EMI [20], [21].…”

Section: Externally Coupled Emcmentioning

confidence: 99%

A review on techniques and modelling methodologies used for checking electromagnetic interference in integrated circuits

Baba

Mustapha²,

Hasbullah³

2022

IJEECS

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The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.

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Section: Externally Coupled Emcmentioning

confidence: 99%

A review on techniques and modelling methodologies used for checking electromagnetic interference in integrated circuits

Baba

Mustapha²,

Hasbullah³

2022

IJEECS

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“…In isolated power converters with power cables, V A is the voltage difference between the primary ground and the secondary ground, which is mainly caused by the unbalanced parasitics of the transformer [13][14] . In non-isolated power converters with power cables, V A is the voltage difference across the input and output cables owing to the noise current voltage drop on the ground impedance [15] .…”

Section: Introduction1mentioning

confidence: 99%

“…The impedances of the bulk capacitor C DC , X-capacitor C X , and output capacitor C out are assumed to be zero for CM EMI analysis [13] . The impedances of the diode rectifier and the DM inductor L DM can be ignored for radiated EMI analysis because they are much smaller than the Z A of the cable antenna [13] . The transformer can be represented by a two-impedance model for CM EMI analysis [25] .…”

Section: Introduction1mentioning

confidence: 99%

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Prediction and Measurement Techniques for Radiated EMI of Power Converters with Cables

Wang

2022

Chin. J. Electr. Eng.

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Recently, radiated electromagnetic interference (EMI) has become a research hotspot in power electronics systems, as the switching frequencies of power electronics systems have increased significantly with the adoption of wide-bandgap devices. In this article, a generalized radiated EMI model for power electronics converters with power cables is first reviewed. The radiated EMI model is then developed for a flyback power converter with critical ground impedance included. Based on the developed model, accurate high-frequency parameter extraction techniques and a radiated EMI prediction technique are developed and experimentally validated. Finally, essential measurement techniques are identified and developed to accurately extract parameters for accurate EMI prediction. The effects of the resolution bandwidth of the spectrum analyzer and critical PCB ground impedance on the radiated EMI are experimentally validated. PCB's impact on the common-mode (CM) choke's impedance and the radiated EMI is further validated. Techniques for minimizing the undesired near-field couplings in parameter extraction are discussed. The predicted EMI properly agreed with the measured EMI in the range of 30-230 MHz based on the EN55032 3 m class B standard.

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“…Electromagnetic interference (EMI) is an inherent phenomenon in the world of electrical pulsed power technologies and goes along with the recent technological progress regarding their associated monitoring devices [1,2]. Pulsed power (PP) generators more and more often feature solid-state devices and, more specifically, wide-bandgap semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Analytical and 3D Numerical Study of Multilayer Shielding Effectiveness for Board Level Shielding Optimization

et al. 2022

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The strong development of solid-state power sources offers numerous benefits (such as higher operating frequencies and reduced switching times and power losses), but contributes inherently to the extended range of electromagnetic interferences (EMI). As these systems are associated with a set of embedded monitoring devices using low amplitude signals, it becomes necessary to consider new critical cases of electromagnetic (EM) immunity correlated to such environments. The most common solution against aggressive radiated EMI is the metallic enclosure, which brings a strong shielding effectiveness (SE), but is it always the best compromise? Our study in this paper is focused on the SE of multilayer designs and is therefore intended to optimize the enclosures’ compactness for board level shielding (BLS) on printed circuit boards (PCB). First, results are presented, based on metallic multilayer shielding theory and parametric numerical studies in the intentional electromagnetic interferences (IEMI) frequency range, from 0.2 to 5 GHz. Then, a complete 3D EM co-simulation model using the microwave and design modules of CST Studio Suite (which includes the subject, the EMI radiating source, and the multilayer shielding) is proposed, with emphasis on the pertinent choices regarding layers width and their arrangement for compact EM shielding and immunity optimization.

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Modeling and Reduction of Radiated EMI in a GaN IC-Based Active Clamp Flyback Adapter

Cited by 42 publications

References 24 publications

A review on techniques and modelling methodologies used for checking electromagnetic interference in integrated circuits

A review on techniques and modelling methodologies used for checking electromagnetic interference in integrated circuits

Prediction and Measurement Techniques for Radiated EMI of Power Converters with Cables

Analytical and 3D Numerical Study of Multilayer Shielding Effectiveness for Board Level Shielding Optimization

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