Commutation Behavior and Stray Inductance Analysis of a FC-3L-BDC Phase-Leg PEBB

Haitao Liu, Shunmeng Xie (), Zechun Dou, Yu Qi, Feng Liu and Yifan Tan
Additional contact information
Haitao Liu: School of Traffic & Transportation Engineering, Central South University, Changsha 410083, China
Shunmeng Xie: CRRC Zhuzhou Institute CO., Ltd., Zhuzhou 412001, China
Zechun Dou: CRRC Zhuzhou Institute CO., Ltd., Zhuzhou 412001, China
Yu Qi: CRRC Zhuzhou Institute CO., Ltd., Zhuzhou 412001, China
Feng Liu: CRRC Zhuzhou Institute CO., Ltd., Zhuzhou 412001, China
Yifan Tan: CRRC Zhuzhou Institute CO., Ltd., Zhuzhou 412001, China

Energies, 2022, vol. 15, issue 24, 1-28

Abstract: The bidirectional dc-dc converter is a critical component for extending the use of renewable energy and improving the efficiency of high-power electronic systems. This paper presents the analysis of the stray inductance of a commutation loop and the commutation behavior of IGBT devices in a flying capacitor three-level bidirectional DC-DC converter (FC-3L-BDC) phase-leg power electronic building block (PEBB). An FC-3L-BDC phase-leg PEBB was designed as an example, which can be used to build 400 kW to MW-grade light rail train chargers, battery energy storage interface converters, or metro regenerative braking energy recovery converters with a single PEBB or several PEBBs interleaved parallel. In order to optimize the stray inductance of commutation paths and realize snubberless operation, a five-layer laminated bus bar was carefully designed, and the stray inductance of the bus bar was extracted by three-dimensional finite element analysis simulation. To obtain higher accuracy, the stray inductances of IGBT devices and capacitors were extracted from the test instead of their datasheets. Then, the accuracy of the commutation loop stray inductance analysis method was verified by practical experiments. The impact of the stray inductance of the commutation loop on the commutation behavior of IGBT devices was analyzed, and the switching characteristics of IGBT devices were measured under maximum DC-link voltage and entire current rating range at the temperatures of −40 °C, 25 °C, and 150 °C, respectively, finding that neither the excessive turn-off overvoltage of IGBTs nor the snappy reverse recovery of FWDs was observed.

Keywords: bidirectional DC-DC converter; flying capacitor; power electronics building block (PEBB); stray inductance; three level (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
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/24/9651/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/24/9651/ (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:15:y:2022:i:24:p:9651-:d:1008392

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 ().