Optimized Design of Laminated Busbar for Large-Capacity Back-to-Back Converters

Mingxia Xu, Ninghui Wang and Zhipeng Wang
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Mingxia Xu: School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
Ninghui Wang: School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China
Zhipeng Wang: CRRC Dalian R&D Co., Ltd., Dalian 116052, China

Energies, 2022, vol. 15, issue 3, 1-17

Abstract: As a key component of a large-capacity converter, the laminated busbar can improve the reliability, integration and power density of the converter and has great advantages in reducing the parasitic inductance of the switching loop. The laminated busbar suitable for a high-capacity back-to-back converter has a complex structure, and couple with each side converter. It has been challenging to optimize the equivalent inductance by using the traditional single-converter busbar design method. In this paper, the coupling inductance model of the back-to-back converter is established, and the relationship between the voltage stress of the switch tube and the stray inductance is analyzed in detail. Based on this, the design principle of the laminated busbar is proposed, and an optimized design structure of the laminated busbar suitable for the large-capacity back-to-back converter is given. Finally, the results were effectively verified by simulation analysis and a 180 kW integrated intermediate frequency auxiliary power converter.

Keywords: back-to-back converter; laminated busbar; stray inductance; auxiliary power supply (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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