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FANG Wei,CHEN Tinghe,LIU Xiaodong,LIU Sucheng.Research on Drive Power Supply of High-power Shield Gate Based on ZVZCS[J].JOURNAL OF POWER SUPPLY,2019,17(5):39-47
Research on Drive Power Supply of High-power Shield Gate Based on ZVZCS
Received:July 02, 2018  Revised:March 20, 2019
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DOI:10.13234/j.issn.2095-2805.2019.5.39
Keywords:shield gate  DC drive power supply  zero-voltage zero-current switching(ZVZCS)  phase-shifted fullbrid-ge  circuit characteristics
Fund Project:Project Supported by Natural Science Foundation of the Anhui Higher Education Institution(KJ2016A804, KJ2017A067);Anhui Provincial Natural Science Foundation (1708085ME106).
           
AuthorInstitutionEmail
FANG Wei Key Laboratory of Power Electronics and Motion Control, Anhui University of Technology, Ma'anshan , China
CHEN Tinghe Key Laboratory of Power Electronics and Motion Control, Anhui University of Technology, Ma'anshan , China tinghechen45@163.com
LIU Xiaodong Key Laboratory of Power Electronics and Motion Control, Anhui University of Technology, Ma'anshan , China
LIU Sucheng Key Laboratory of Power Electronics and Motion Control, Anhui University of Technology, Ma'anshan , China
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Abstract:
      Shield gates are key equipment in an urban rail transportation system. When multiple gates are operated under the same order, the DC power supply system is required to provide a large power output instantaneously; meanwhile, the output voltage should keep a small derivation, which imposes higher requirement on the power supply. In this paper, based on the zero-voltage zero-current switching(ZVZCS) full-bridge transform topology, a class of high-power DC power supply module is designed. The switching mode of the ZVZCS full-bridge converter in one cycle is analyzed, and the key waveforms are presented. According to the charging/discharging process of the parallel harmonic capacitor on the leading leg, the condition of zero-voltage switching(ZVS) is determined. With the combination of the switching tube's withstand voltage and the recovery time of primary winding current under the condition of zero-current switching(ZCS), the range of blocking capacitors is also deduced. In addition, the formula for calculating the maximum effective duty cycle is given, and the switching losses of the leading and lagging legs are analyzed in detail. According to the design parameters, a 2.2 kW experimental prototype was fabricated. Experimental results show that the designed DC power supply module realized soft switching in various load states, which improved the power supply efficiency and presented satisfying dynamic characteristics.
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