Modeling and Reduction of Radiated EMI due to Ground Impedance in a High-density Active-clamp Flyback Power Adapter

Ma, Zhedong; Wang, Shuo; Sheng, Honggang; Lakshmikanthan, Srikanth

doi:10.1109/apec43599.2022.9773445

Cited by 11 publications

(4 citation statements)

References 19 publications

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“…The inclusion of a PCB ground impedance model can improve the accuracy when studying the radiated EMI of active clamped flyback (ACF) power converters (Ma et al, 2023b). The resolution bandwidth's impact on radiated EMI should be considered because the impedance of critical PCB traces above 30 MHz for radiated EMI analysis cannot be ignored when the switching frequency of the power converter is smaller than 240 kHz (Ma et al, 2022a;Yao et al, 2022).…”

Section: Modeling Of Radiated Emimentioning

confidence: 99%

“…The radiated EMI inside the converter valve mainly comprised differential-mode current and common-mode current in the circuits of IGBTs and their control boards, and the CM current electromagnetic interference is dominant (Zhou et al, 2022;Fan et al, 2023). When compared with conducted EMI, radiated EMI's stray inductance and capacitance parameters are more complicated to calculate, so the modeling and analysis of radiated EMI become more difficult (Ma et al, 2022a).…”

Section: Introductionmentioning

confidence: 99%

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EMI challenges in modern power electronic-based converters: recent advances and mitigation techniques

Yuan,

Zhang,

Liang

et al. 2023

Front.Electron.

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The utilization of power electronic-based converters is gaining momentum across a wide spectrum of industries. However, modern power electronic converters operate at higher frequencies compared to conventional power electronic converters, which can lead to higher rates of change in voltage and current during phase switching, and thus potentially produce more severe conducted and radiated electromagnetic interference (EMI). Their electromagnetic compatibility (EMC) has become a critical research topic, and EMI in high-frequency power electronic-based converters is more complex than that in conventional converters. This review presents a comprehensive survey of recent advancements, EMI design, and analysis of modern power electronic-based converters, focusing on the sources and mechanisms of both conducted and radiated EMI, and mitigating techniques. This review also covers the impact of topology optimization, control strategy design, and packaging design on EMC performance. Addressing emerging EMI issues in modern power electronic device-based converters is essential for ensuring safe and reliable operations. Through strategic design optimization and the implementation of EMI mitigation strategies, modern converters can seamlessly be integrated into diverse applications, offering improved EMI performance as a hallmark of their versatility.

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Section: Modeling Of Radiated Emimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

EMI challenges in modern power electronic-based converters: recent advances and mitigation techniques

Yuan,

Zhang,

Liang

et al. 2023

Front.Electron.

View full text Add to dashboard Cite

show abstract

“…(4) Because the impedance of critical PCB traces cannot be ignored above 30 MHz [15,21] for radiated EMI analysis, the impact of critical PCB traces must be included when extracting the voltage in power converters. A comparison of the FFT spectra of voltages with (V GS ) and without (V PS ) the influence of the critical ground impedance is shown in Fig.…”

Section: Radiated Emi Predictionmentioning

confidence: 99%

“…Transformer shielding winding and cancellation winding techniques were developed to significantly reduce the CM noise [19][20] . The critical ground impedance was identified and minimized to reduce the undesired transformation from the DM currents to the CM excitation voltage V A [15,21] .…”

Section: Introduction1mentioning

confidence: 99%

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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Optimization of Core Size and Harvested Power for Magnetic Energy Harvesters based on Cascaded Magnetics

Gao,

Herrera,

Moon

2023

2023 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Modeling and Reduction of Radiated EMI due to Ground Impedance in a High-density Active-clamp Flyback Power Adapter

Cited by 11 publications

References 19 publications

EMI challenges in modern power electronic-based converters: recent advances and mitigation techniques

EMI challenges in modern power electronic-based converters: recent advances and mitigation techniques

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

Optimization of Core Size and Harvested Power for Magnetic Energy Harvesters based on Cascaded Magnetics

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