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A Novel Boost-Input Full-Bridge Converter
Sonoda Takahiro,Ninomiya Tamotsu,Tomioka Satoshi,Sato Kei,Terashi Hiroto The Korean Institute of Power Electronics 2005 JOURNAL OF POWER ELECTRONICS Vol.5 No.3
In order to correct the power boost topology has been used for easy control. But conventional boost topology has the following drawbacks: switching voltage surge, cross conduction current and right-half-plane zero of its control transfer function. Furthermore, in this topology the output voltage is always higher than the input voltage. As a result, a first-stage boost PFC converter needs to be connected with a second-stage DC-DC converter. A new topology which can be used as single stage PFC converter is proposed in this paper.
A Novel Boost-Input Full-Bridge Converter
Takahiro Sonoda,Tamotsu Ninomiya,Satoshi Tomioka,Kei Sato,Hiroto Terashi 전력전자학회 2005 JOURNAL OF POWER ELECTRONICS Vol.5 No.3
In order to correct the power boost topology has been used for easy control. But conventional boost topology has the following drawbacks: switching voltage surge, cross conduction current and right-half-plane zero of its control transfer function. Furthermore, in this topology the output voltage is always higher than the input voltage. As a result, a first-stage boost PFC converter needs to be connected with a second-stage DC-DC converter. A new topology which can be used as single stage PFC converter is proposed in this paper.
EMI Prediction and Reduction of Zero-Crossing Noise in Totem-Pole Bridgeless PFC Converters
Zhang, Baihua,Lin, Qiang,Imaoka, Jun,Shoyama, Masahito,Tomioka, Satoshi,Takegami, Eiji The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.1
In this study, a zero-crossing spike current issue in a totem-pole bridgeless power factor correction (PFC) converter is comprehensively investigated for the first time. Spike current occurs when input voltage crosses zero, becomes a noise source, and causes severe common mode emission issues. A generation mechanism for electromagnetic interference (EMI) is presented to investigate the EMI problem caused by zero-crossing issue, and a noise spectrum due to this issue is predicted by a theoretical analysis based on the Fourier coefficient of an approximate spike current waveform. Furthermore, a noise reduction method is proposed and then improved to reduce the spike current. Experimental measurements are implemented on a GaN-based totem-pole bridgeless PFC converter, and the spike current can be effectively suppressed through the proposed method. Furthermore, the noise spectrums measured without and with the reduced zero-crossing spike current are compared. Experimental results validate the analysis of the noise spectrum caused by the zero-crossing spike current issue.
EMI Prediction and Reduction of Zero-Crossing Noise in Totem-Pole Bridgeless PFC Converters
Baihua Zhang,Qiang Lin,Jun Imaoka,Masahito Shoyama,Satoshi Tomioka,Eiji Takegami 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.1
In this study, a zero-crossing spike current issue in a totem-pole bridgeless power factor correction (PFC) converter iscomprehensively investigated for the first time. Spike current occurs when input voltage crosses zero, becomes a noise source,and causes severe common mode emission issues. A generation mechanism for electromagnetic interference (EMI) is presentedto investigate the EMI problem caused by zero-crossing issue, and a noise spectrum due to this issue is predicted by a theoreticalanalysis based on the Fourier coefficient of an approximate spike current waveform. Furthermore, a noise reduction method isproposed and then improved to reduce the spike current. Experimental measurements are implemented on a GaN-basedtotem-pole bridgeless PFC converter, and the spike current can be effectively suppressed through the proposed method. Furthermore, the noise spectrums measured without and with the reduced zero-crossing spike current are compared. Experimental results validate the analysis of the noise spectrum caused by the zero-crossing spike current issue.