Differential Mode Noise Estimation and Filter Design for Interleaved Boost Power Factor Correction Converters

Interleaved power factor correction (PFC) is widely used circuit topology due to good efficiency and power density for single-switch boost PFC. As the differential mode (DM) electromagnetic interference (EMI) noise magnitude depends upon the input current ripple, this research details a comprehensive study of DM EMI filter design for interleaved boost PFC with the aim of minimizing the component size. It is also demonstrated that the different numbers of interleaved stages and switching frequency influence the filter attenuation requirement and, thus, the EMI filter size. First, an analytical model is derived on the basis of the Norton equivalent circuit model for the differential mode noises of interleaved boost PFC within the frequency range of 9–500 kHz. The derived model can help identify the proper phase shifting among the interleaved boost converters in order to minimize the considered differential mode noises at the filter design frequency. So, a novel phase-shift method is developed to get a minimized attenuation required by a filter in Band B. Further, a volume optimization of the required DM filter was introduced based on the calculated filter attenuation and volumetric component parameters. Based on the obtained results, unconventional and conventional phase shifts have demonstrated a good performance in decreasing the EMI filter volume in Band B and Band A, respectively. A 2-kW interleaved PFC case study is presented to verify the theoretical analyses and the impact of phase-shifting on EMI filter size.

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DM Noise Estimation and DM EMI Filter Design for Interleaved Boost PFC Converters

10.20944/preprints202102.0358.v1 ◽

2021 ◽

Author(s):

Naser Nourani Esfetanaj ◽

Huai Wang ◽

Frede Blaabjerg ◽

Pooya Davari

Keyword(s):

Filter Design ◽

Equivalent Circuit Model ◽

Phase Shifting ◽

Switching Frequency ◽

Differential Mode ◽

Good Efficiency ◽

Component Size ◽

Filter Size ◽

Emi Filter ◽

The Impact

Interleaved power factor correction (PFC) is widely used circuit topology due to good efficiency and power density for single-switch boost PFC. As the differential mode (DM) electromagnetic interference (EMI) noise magnitude depends upon the input current ripple, this research details a comprehensive study of DM EMI filter design for interleaved boost PFC with the aim of minimizing the component size. It is also demonstrated that the different numbers of interleaved stages and switching frequency influence the filter attenuation requirement and, thus, the EMI filter size. First, an analytical model is derived on the basis of the Norton equivalent circuit model for the differential mode noises of interleaved boost PFC within the frequency range of 9-500 kHz. The derived model can help identify the optimal phase shifting among the interleaved boost converters in order to minimize the considered differential mode noises at the filter design frequency. So, a novel phase-shift method is developed to get a minimized attenuation required by a filter in Band B. Further, a volume optimization of the required DM filter was introduced based on the calculated filter attenuation and volumetric component parameters. Based on the obtained results, unconventional and conventional phase shifts have demonstrated a good performance in decreasing the EMI filter volume in Band B and Band A, respectively. A 2-kW interleaved PFC case study is presented to verify the theoretical analyses and the impact of phase-shifting on EMI filter size.

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Differential Mode Active EMI Filter Design for a Boost Power Factor Correction AC/DC Converter

IEEE Journal of Emerging and Selected Topics in Power Electronics ◽

10.1109/jestpe.2018.2839734 ◽

2019 ◽

Vol 7 (1) ◽

pp. 576-590 ◽

Cited By ~ 15

Author(s):

Rajib Goswami ◽

Shuo Wang ◽

Eugene Solodovnik ◽

Kamiar J. Karimi

Keyword(s):

Power Factor ◽

Filter Design ◽

Power Factor Correction ◽

Differential Mode ◽

Emi Filter

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The Effect of Switching Frequency Modulation on the Differential-Mode Conducted Interference of the Boost Power-Factor Correction Converter

IEEE Transactions on Electromagnetic Compatibility ◽

10.1109/temc.2007.903404 ◽

2007 ◽

Vol 49 (3) ◽

pp. 526-536 ◽

Cited By ~ 11

Author(s):

Richard Morrison ◽

Daithi Power

Keyword(s):

Power Factor ◽

Frequency Modulation ◽

Power Factor Correction ◽

Switching Frequency ◽

Differential Mode

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Effectiveness of a Power Factor Correction Policy in Improving the Energy Efficiency of Large-Scale Electricity Users in Ghana

Energies ◽

10.3390/en12132582 ◽

2019 ◽

Vol 12 (13) ◽

pp. 2582 ◽

Cited By ~ 3

Author(s):

Samuel Lotsu ◽

Yuichiro Yoshida ◽

Katsufumi Fukuda ◽

Bing He

Keyword(s):

Energy Efficiency ◽

Power Factor ◽

Large Scale ◽

Regression Discontinuity ◽

Power Factor Correction ◽

Energy Crisis ◽

Regression Discontinuity Design ◽

The Government ◽

Power Factor Improvement ◽

The Impact

Confronting an energy crisis, the government of Ghana enacted a power factor correction policy in 1995. The policy imposes a penalty on large-scale electricity users, namely, special load tariff (SLT) customers of the Electricity Company of Ghana (ECG), whose power factor is below 90%. This paper investigates the impact of this policy on these firms’ power factor improvement by using panel data from 183 SLT customers from 1994 to 1997 and from 2012. To avoid potential endogeneity, this paper adopts a regression discontinuity design (RDD) with the power factor of the firms in the previous year as a running variable, with its cutoff set at the penalty threshold. The result shows that these large-scale electricity users who face the penalty because their power factor falls just short of the threshold are more likely to improve their power factor in the subsequent year, implying that the power factor correction policy implemented by Ghana’s government is effective.

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