A Variable-Structure Multi-Resonant DC–DC Converter with Smooth Switching

Mengying Chen, Yifeng Wang, Liang Yang, Fuqiang Han, Yuqi Hou and Haiyun Yan
Additional contact information
Mengying Chen: School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Yifeng Wang: School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Liang Yang: National Electric Power Dispatching and Control Center, State Grid Corporation of China, Beijing 100031, China
Fuqiang Han: School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Yuqi Hou: School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Haiyun Yan: State Grid Tianjin Maintenance Company, Tianjin 300250, China

Energies, 2018, vol. 11, issue 9, 1-21

Abstract: In this paper, a variable-structure multi-resonant soft-switching DC–DC converter and its transient smooth control method are proposed. Through the introduction of auxiliary switches, the converter can flexibly adjust its structure among three operating modes. Two switching processes can be obtained. Thus, a wide voltage gain range is achieved within a narrow frequency range. Moreover, to eliminate the large voltage fluctuation during modes switching, a drive signal gradual adjustment control method is proposed. Consequently, smooth switching between different modes can be realized and the voltage fluctuation is suppressed effectively. Finally, a 200 W experimental prototype is established to verify the theoretical analyses. Soft-switching performances for power switches and diodes are both guaranteed. The highest efficiency is 98.2%. With the proposed transient control method, a basically constant 400 V output voltage is ensured within a wide input voltage range (80 V–600 V). In particular, the transient voltage fluctuations during two switching processes decrease from 38.4 V to 10.8 V and from 37.2 V to 8.4 V, respectively.

Keywords: variable structure; multi-resonant; soft switching; DC–DC converter; transient control; smooth switching (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/9/2240/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/9/2240/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:11:y:2018:i:9:p:2240-:d:165981

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().