Design for a Four-Stage DC/DC High-Voltage Converter with High Precision and a Small Ripple

Wei Zheng (), Cong Hu, Bin Zhao, Xiaobao Su, Gang Wang and Xiaowan Hou
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Wei Zheng: Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
Cong Hu: Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
Bin Zhao: Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
Xiaobao Su: Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
Gang Wang: Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
Xiaowan Hou: Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

Energies, 2022, vol. 16, issue 1, 1-12

Abstract: This paper presents a four-stage DC/DC converter with high precision and a small ripple utilized in an electronic power conditioner (EPC). The galvanically isolated four-stage topology contains four cascade connections: a buck circuit, a push–pull circuit, a power converter, and a voltage regulator. The push–pull switches, as well as the diodes in the output-side rectifier, operate in zero-voltage switching (ZVS) and zero-current switching (ZCS) modes at both switch off and switch on, which helps increase the efficiency. The maximum efficiency of the converter can reach 94.5%. The buck circuit and voltage regulator operate in a two-stage closed-loop condition and, thus, the precision is greater than 0.02%. Due to the voltage regulator, the ripple is less than 1 V when the output voltage reaches 7000 V.

Keywords: four-stage DC/DC; high-precision; small ripple (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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