Analysis of ZVS of the Multi-input Port Three-phase Interleaved LLC Considering Magnetic Coupling
Conference: PCIM Conference 2025 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/06/2025 - 05/08/2025 at Nürnberg, Germany
doi:10.30420/566541298
Proceedings: PCIM Conference 2025
Pages: 5Language: englishTyp: PDF
Authors:
Sun, Xuchen; Guan, Jiajia; Chu, Hao; Tanzil, M.; Chen, Cai; Kang, Yong
Abstract:
Totem pole PFC topology is widely used due to the low voltage stress and high efficiency. However, it will have three independent busbars under three-phase AC input, and the single input LLC is not applicable. To solve this problem, a three-phase interleaved LLC with three independent input ports is proposed. Further, a five-column three-phase transformer structure is proposed. The ZVS implementation considering the effect of magnetic coupling is given. Finally, an 11kW AC-DC converter with 90-265V AC input and 450-900V DC output is designed, which can achieve a power density of 3.5kW/L and 97.1% peak efficiency.