A SiC-Based 60kW LLC Converter with Novel Transformer Design for Improving Voltage Balance
Conference: PCIM Europe 2024 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/11/2024 - 06/13/2024 at Nürnberg, Germany
doi:10.30420/566262303
Proceedings: PCIM Europe 2024
Pages: 6Language: englishTyp: PDF
Authors:
Wei, Chen; Hu, Zongzeng; Chen, Jianlong; Zhang, Fulin
Abstract:
This paper introduces a novel transformer design to address the voltage imbalance issue for an LLC converter with multiple transformers in series to support a wide output voltage range. The proposed transformer design is implemented on a digital controlled SiC-based 60kW prototype with a switching frequency of 125kHz-250kHz. Identical voltage balance is demonstrated in a three phase LLC converter with 200Vdc-1000Vdc wide output voltage range and exceeding 98.5% in peak efficiency for EV fast charger.