| Title |
Development of a 25kW High-frequency Phase-shift PWM Full-bridge DC/DC Converter for a Wide Range of Load Applications |
| Authors |
Sang-In Bae ; Woo-Cheol Jeong ; Jang-Hun Park ; Min-Woo Tae ; Hong-Je Ryoo |
| DOI |
https://doi.org/10.6113/TKPE.2025.30.4.291 |
| Keywords |
Phase-shift PWM Full-bridge(PSPWM FB); 25kW; Zero Voltage Switching(ZVS); High-frequency |
| Abstract |
This paper describes a 25 kW phase-shifted full-bridge converter (PSFB) operating at a high frequency. The switching frequency was set to 500 kHz, and a SiC MOSFET full-bridge module was applied to the PSFB for high power density, which contains state-of-the-art semiconductor device technology, along with PCB and transformer designs optimized for high frequency. Because the applicability to a wide range of load conditions is a key concern, this paper also analyzes the conditions for achieving broad zero-voltage switching (ZVS). It proposes a gate driver that fulfills this purpose based on the analysis. The enhanced operation, incorporating design considerations, was verified through simulations and experiments under various resistive load conditions. |