A Power Electronics Traction Transformer for High-Speed Trains in China: Toward a Lighter and More Compact Traction System
Abstract
The pursuit of a lighter and more compact traction system in high-speed trains drives the development of a power electronics traction transformer for China’s high-speed trains. This article introduces the topology, control and implementation of the proposed PET, which features a double-side modulation for the isolated dc/dc LLC converters and state-of-the-art medium-frequency transformers with compact insulation and cooling solutions. Field tests on a test railway have validated the PET’s performance, achieving a remarkable 96.7% efficiency with 0.34 kW/L and 0.47 kW/kg in power density which is 20% smaller in size and 15% lighter in weight than traditional line-frequency systems for a CRH-6 train.
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References 44 · Cited by 7
- Authors
- Li, C., Chen, T., Su, L., Zhang, Z., & Zheng, Z.
- Affiliations
- Tsinghua University (CN)
- China Railway Rolling Stock Corporation Zhuzhou Institute (China) (CN)
- Venue
- IEEE Industrial Electronics Magazine
- Published
- 2025-06
- Volume
- 19
- Issue
- 2
- Pages
- 6-19
- ISSN
- 1932-4529 (ISSN-L)
- 1941-0115
- OpenAlex
- W4405023122
- Cited by
- 7
- References
- 44
- Citations by year
- 2026: 4 · 2025: 3
- FWCI
- 0.73
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- IEEE Industrial Electronics Magazine (publishedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced DC-DC Converters
- Physical Sciences › Engineering › Industrial and Manufacturing Engineering › Railway Systems and Energy Efficiency
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Wireless Power Transfer Systems
- Keywords
- high-speed trains, isolated DC-DC converter, LLC resonant converter, medium frequency transformer, transformer cooling, power density, railway traction systems
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