A Family of Switched-capacitor-based Hybrid DC-DC Converters with Continuously Adjustable Gain

The poor voltage regulation capability of traditional switched-capacitor converters (SCCs) is one severe disadvantage that limits the applicable fields. In this paper, one of the diodes in the five common step-up SCCs - Ladder, Dickson, Fibonacci, Series-parallel, Voltage Doubler- is replaced by a f...

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Bibliographic Details
Published in2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia) pp. 2341 - 2346
Main Authors Li, Shouxiang, Li, Zhenning, Huang, Cheng, Zheng, Shuhua, Jia, Pengyu
Format Conference Proceeding
LanguageEnglish
Published IEEE 29.11.2020
Subjects
DC-DC power converters
hybrid converter
Hybrid power systems
Inductors
Motion control
Power electronics
regulation capability
switched-capacitor converter
Switches
Voltage control
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Summary:The poor voltage regulation capability of traditional switched-capacitor converters (SCCs) is one severe disadvantage that limits the applicable fields. In this paper, one of the diodes in the five common step-up SCCs - Ladder, Dickson, Fibonacci, Series-parallel, Voltage Doubler- is replaced by a filter inductor. As a result, the new formed switched-capacitor-based (SC-based) hybrid converters attain the wide and continuous voltage regulation capability. Different replaced diode positions lead to different characteristics, so a brief comparison of voltage gain is given. The added inductor may conduct reverse current and thus deteriorate the efficiency, so a boundary map is derived to avoid such region. A hybrid converter based on the 3X Ladder SCC was built to verify the analysis.
DOI:10.1109/IPEMC-ECCEAsia48364.2020.9368111