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ZHANG Heng,WANG Cong,ZHUANG Yuan,HOU Linan.Analysis and Design of “Y” Connection of Three-phase Diode H-bridge Cascaded Converter[J].JOURNAL OF POWER SUPPLY,2018,16(3):54-61
Analysis and Design of “Y” Connection of Three-phase Diode H-bridge Cascaded Converter
Received:December 12, 2016  Revised:February 05, 2017
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DOI:10.13234/j.issn.2095-2805.2018.3.54
Keywords:three-phase diode H-bridge  unit power factor  booster ratio
Fund Project:Project Supported by National Natural Science Fondation of China(5157070726)
           
AuthorInstitutionEmail
ZHANG Heng School of Mechanical Electronic & Information Engineering, China University of Mining & TechnologyBeijing, Beijing , China 870987598@qq.com
WANG Cong School of Mechanical Electronic & Information Engineering, China University of Mining & TechnologyBeijing, Beijing , China
ZHUANG Yuan School of Mechanical Electronic & Information Engineering, China University of Mining & TechnologyBeijing, Beijing , China
HOU Linan School of Mechanical Electronic & Information Engineering, China University of Mining & TechnologyBeijing, Beijing , China
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Abstract:
      Considering that a medium/high voltage power converter is only supposed to realize single-directional power flowin about 70% industrial applications, a "Y" connection of three-phase diodeH-bridge cascaded converter is analyzed, which can be used to constitute the rectifier stage in a new generation of high-frequency medium/high voltage power converter. Considering that the single-phase diode H-bridge cascaded converter cannot realize unit power factor operation, and based on the analysis of the working principle of the "Y" connection of three-phase diodeH-bridge converter, the theoretical foundation for the unit power factor operation of the three-phase system is given, focusing on the discussion of two working modes of the converter. Meanwhile, the maximum booster ratio and the constraint conditions of the system's main parameters(e.g., inductor and capacitor) are obtained using a vector diagram method. Fina-lly, the vali-dity and the feasibility of the proposed method was validated by simulation and experimental results.
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