Research on aerospace application of half-bridge resonant converter

Aiming at the continuous improvement of aerospace DC/DC conversion efficiency requirements and the relatively poor electrical characteristics of available aerospace power semiconductor devices, the research on half-bridge resonant soft switch topology for efficient conversion was carried out. The working process of the half-bridge resonant converter under PFM and PWM control modes is analyzed. A half-closed loop hybrid control method suitable for output voltage interval control and synchronous rectification control method based on multiple side current sampling is proposed. For different output voltage control sections, different control schemes and synchronous rectification schemes are adopted to achieve the balance between converter efficiency improvement and power supply security.