A Balanced Feedforward Current-Sense Current-Compensation Active EMI Filter for Common-Mode Noise Reduction

Shin, Dongil; Jeong, Sangyeong; Baek, Youngjin; Park, Chansoo; Park, Gwigeun; Kim, Jingook

doi:10.1109/temc.2019.2906854

Cited by 17 publications

(6 citation statements)

References 28 publications

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“…According to different usage conditions, choosing the appropriate lens is an important part of the design of the ceramic chromatic aberration online detection system. When selecting the optical lens, the imaging size of the lens should be consistent with the size of the photosensitive element array of the camera; the interface of the lens and the interface of the camera should be as consistent as possible; the resolution of the lens and the resolution of the photosensitive element array of the camera should be matched as much as possible, so that the performance of the two can be fully utilized [21].…”

Section: Dip Technologymentioning

confidence: 99%

Ceramic Art Based on Digital Technology Image Processing

2024

jipta

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Ceramics first emerged in ancient China, and the development of ceramic art has a long history. In today's digital age, how to use the power of science and technology to conduct research on ceramic art is a problem worthy of attention. Digital Image Processing (DIP for short) is a method of using computer to perform graphics calculation, which has the characteristics of high efficiency and intelligence. It aims to use DIP technology to study ceramic art. In this regard, it has proposed to use convolutional neural network (CNN for short) to extract image features, identify and detect ceramic artworks, and has used mean filtering and median filtering to optimize the noise reduction of the identified images, so that the obtained image Higher quality. In the simulation test, it has selected 50 ceramic products for image recognition and detection, and has divided them into two groups for analysis. The results have showed that the inverse histograms of the two sets of images could reflect the defective parts of the ceramic products. Based on this, the lowest accuracy rate of CNN recognition was over 85%, and the highest accuracy rate was 94%. In the first group of images, the SNRs obtained by mean filtering and median filtering are the lowest of 7.7, 6.5, the highest are 8.7, 8.3, and the average SNR is about 8.0, 7.2; the SNR obtained by the two filtering methods of the second group of images is around 6.5 to 8.0, and the SNR of the mean filtering is slightly higher. Therefore, some practical results have been achieved in the research of ceramic art using DIP technology.

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Section: Dip Technologymentioning

confidence: 99%

Ceramic Art Based on Digital Technology Image Processing

2024

jipta

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“…(144 kHz to 266 kHz) for the better EMI mitigation process. The linear feedback shift register has been utilized to achieve the above said RCFMFD [22]. From Figure 8.…”

Section: Randomized Carrier Frequency Modulation With Fixed Dutymentioning

confidence: 99%

A comparison statement on DCPWM based conducted EMI noise mitigation process in DC-DC converters for EV

Kalaiarasu

Natarajan

2023

Bulletin EEI

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Fast switching techniques at high frequencies are employed for quick charging and energy conversion in electric vehicle (EV) power converters. Electromagnetic interference (EMI) noise is produced due to the fast-switching process, which may result in malfunctioning and degraded EV performance. In this work, a digital chaotic pulse width modulation (DCPWM) technique-based EMI noise mitigation process has been applied to elementary positive output super lift Luo (EPOSLL), two-stage cascaded boost (TSCB), and ultra-lift Luo (ULL) converters, and a comparison study has been conducted with EMI reduction levels as per electromagnetic compatibility (EMC) standards. The duty cycle is varied from 0.5 to 0.67 to get the desired output voltage as an input of 10V to achieve the power ratings of 40 W to 80 W for various load conditions. A total of 4 dBV (3 V) to 15 dBV (10 V) of conducted EMI noise has been mitigated for the above-said converters. Simulation results based on power spectrum density and hardware results based on fast fourier transform (FFT) of output voltages are analyzed. According to the findings, the ULL converter is more acceptable for electromagnetic compatibility in EV applications than EPOSLL and TSCB DC-DC converters.

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“…Although it is still difficult for active filters to achieve high insertion loss in a wide range, the performance of AEFs has improved at high frequencies and AEFs are of widespread use to suppress the EMI of products for high-frequency power converters in recent years. However, the frequencies of interest in most AEF researches are 150 kHz and 1 MHz, and the attenuation band is limited [70][71][72][73][74][75][76], as shown in Figure 14. As a consequence, most proposed AEFs are not capable of meeting the need of EMI suppression in high-frequency power converters.…”

Section: Active Filtersmentioning

confidence: 99%

A review on recent effort of conductive EMI suppression methods in high‐frequency power converters

Xu³

et al. 2022

IET Power Electronics

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High‐frequency power converters with high switching frequency and compact layout are characterised by high power density and high efficiency, which is superior to conventional converters in many aspects. However, the management of electromagnetic interference (EMI) is a significant limitation for their widespread application. Recent conductive EMI suppression methods are reviewed in this paper. The mechanisms and characteristics of the reviewed methods are discussed in detail. Then, the EMI attenuation of the mentioned methods is compared from the perspective of attenuation band, attenuation amplitude, and cost respectively. It is demonstrated that both the source and the propagation path have a significant impact on EMI problems in performance of high‐frequency power converters. Several suggestions can be proposed based on the reviewed researches. Firstly, both the potential matching method and the balance winding method in transformer design can achieve a significant EMI reduction at all frequencies within the frequency range of conducted EMI. Secondly, spread‐spectrum modulation techniques are suggested to be applied in MHz converters instead of constant frequency control. Thirdly, the reviewed gate driver optimisation methods have a remarkable EMI suppression effect at high frequencies and still work for the suppression of radiated EMI. Finally, filters can have a reduced volume if the reviewed methods are applied.

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A Balanced Feedforward Current-Sense Current-Compensation Active EMI Filter for Common-Mode Noise Reduction

Cited by 17 publications

References 28 publications

Ceramic Art Based on Digital Technology Image Processing

Ceramic Art Based on Digital Technology Image Processing

A comparison statement on DCPWM based conducted EMI noise mitigation process in DC-DC converters for EV

A review on recent effort of conductive EMI suppression methods in high‐frequency power converters

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