A Bulk-Capacitance Reduction Method Using Self-Driven Thyristor for AC-DC Converters [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.31 Generation, modification, storage, transmission of electric power
• Thông tin xuất bản: Oak Ridge, Tenn. : Oak Ridge, Tenn. : Oak Ridge National Laboratory ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2021
• Mô tả vật lý: Size: p. 76-80 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 255574
• Chủ đề: 1. 30 direct energy conversion; 2. Bridge circuits; 3. Capacitance; 4. Capacitors; 5. Discharges (electric); 6. Prototypes; 7. Rectifiers; 8. Threshold voltage

Tóm tắt

Universal serial bus power delivery (USB-PD) fast chargers equipped with wide-bandgap devices are driven to higher power density and efficiency. Furthermore, the indispensable high-voltage bulk capacitors used to smooth the rectifier output could take 40% of the total system volume due to the large capacitance value required. This paper discussed a capacitor reduction method using a self-driven thyristor scheme comprised of only three components in total. No extra control circuit is needed. Circuit analysis and design equations are presented, and the design results are implemented in a 60-W GaN-based active-clamp flyback converter. The measurement results on the prototype show a 36.4% reduction of the bulk-capacitor size with similar efficiency compared to the conventional solution.