High-Efficiency High-Power-Density CLLC Resonant Converter With Low-Stray-Capacitance and Well-Heat-Dissipated Planar Transformer for EV On-Board Charger
Abstract
In this article, a high-efficiency high-power-density wide-bandgap-based CLLC resonant converter with a low-stray-capacitance and well-heat-dissipated planar transformer is presented, which is used as the isolated dc-dc stage for an electric vehicle on-board charger. A generalized planar transformer design methodology is proposed and validated by practical designs and experimental tests. A novel and simple transformer configuration is proposed to reduce the winding stray capacitance and enhance the winding thermal dissipation. The proposed transformer configuration is compared with different planar transformer designs, and the tradeoffs of employing the proposed design are well analyzed. Moreover, the system design and optimization of the high-efficiency high-power-density CLLC resonant converter is studied. The proposed transformer design and the system optimization approach are employed in a 6.6-kW/500-kHz CLLC resonant converter prototype. The prototype achieves a peak efficiency of 97.85% and a power density of 114 W/in$^\text {3}$.
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The symmetrical phase-shifted DAB or CLLC resonant converters are more suitable for bidirectional DC/DC converters.
“Therefore, the symmetrical phase-shifted DAB [109] or CLLC resonant converters [110] [112] are more suitable for bidirectional DC/DC converters.”
From A Review of Bidirectional On-Board Chargers for Electric Vehicles (2021) · cites this paper as [112]
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A Review of Bidirectional On-Board Chargers for Electric Vehicles
Yuan, J., Dorn-Gomba, L., Callegaro, A. D., Reimers, J., & Emadi, A. (2021) · IEEE Access · doi:10.1109/access.2021.3069448 · Cited by 390 · see citing works
“rical phase-shifted DAB [109] or CLLC resonant converters [110]–[112] are more suitable for bidirectional DC/DC converters.”
BackgroundMin, J., & Ordonez, M. (2021) · IEEE Transactions on Power Electronics · doi:10.1109/tpel.2020.3033982 · Cited by 152 · see citing works
Muhammad, R., Kieu, H.-P., Park, J., Tat-Thang, L., Choi, S., Jung, H., & Yoon, B.-K. (2022) · 2022 IEEE Applied Power Electronics Conference and Exposition (APEC) · doi:10.1109/apec43599.2022.9773511 · Cited by 15 · see citing works
- Authors
- Zhang, Z., Liu, C., Wang, M., Si, Y., Liu, Y., & Lei, Q.
- Affiliations
- Arizona State University (US)
- Venue
- IEEE Transactions on Power Electronics
- Published
- 2020-10
- Volume
- 35
- Issue
- 10
- Pages
- 10831-10851
- ISSN
- 0885-8993 (ISSN-L)
- 1941-0107
- OpenAlex
- W3011186812
- Cited by
- 137
- References
- 45
- Citations by year
- 2026: 10 · 2025: 25 · 2024: 22 · 2023: 32 · 2022: 25 · 2021: 16 · 2020: 7
- FWCI
- 6.87
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- IEEE Transactions on Power Electronics (publishedVersion)
- Funders
- Office of Naval Research (N00014-16-1-2956)
- National Science Foundation
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced DC-DC Converters
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Wireless Power Transfer Systems
- Physical Sciences › Engineering › Mechanical Engineering › Induction Heating and Inverter Technology
- Keywords
- CLLC resonant converter, planar transformer, wide bandgap semiconductors, electric vehicle on-board charger, power density, converter efficiency
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