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Design of Planar Transformers for LLC Converters in High Power Density On-Board Chargers for Electric Vehicles

Author

Listed:
  • Won-Jin Son

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea)

  • Byoung Kuk Lee

    (Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea)

Abstract

This article presents a planar transformer design and optimization method for high power density on-board chargers (OBCs) utilized in electric vehicles (EVs). Owing to considerations of electrical safety, OBCs require an isolated converter, leading to a substantial increase in volume due to the inclusion of a transformer. To address this issue and achieve high power density, a planar transformer is used, and an optimized design method is proposed for pattern arrangement, width, and core shape. The feasibility of the design is verified through the development of a 3.3 kW OBC prototype. Consequently, when compared to conventional transformers, the design method in this article results in a 27% reduction in the transformer’s height and a 20% reduction in its overall volume. This reduction is advantageous for meeting the requirements of high power density OBCs.

Suggested Citation

  • Won-Jin Son & Byoung Kuk Lee, 2023. "Design of Planar Transformers for LLC Converters in High Power Density On-Board Chargers for Electric Vehicles," Energies, MDPI, vol. 16(18), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:18:p:6757-:d:1245114
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    References listed on IDEAS

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    1. Paolo Iodice & Enrico Fornaro & Massimo Cardone, 2022. "Hybrid Propulsion in SI Engines for New Generation Motorcycles: A Numerical-Experimental Approach to Assess Power Requirements and Emission Performance," Energies, MDPI, vol. 15(17), pages 1-13, August.
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