Patent ID: 10096435

Abstract:
A digitalized double-excitation uninterrupted switching power supply comprises a main transformer provided with a primary coil and a secondary coil, a main loop, a synchronous rectification output loop, a synchronous direct-current converter and a digital control unit, wherein the main loop comprises a high-voltage switching network, a resonant inductor, the primary coil and a resonant capacitor. The synchronous rectification output loop comprises a current-doubler rectifier formed by connecting two synchronous rectifier tubes in series oppositely and the secondary coil in parallel, and a filter circuit connected to two output ends of the current-doubler rectifier. The synchronous direct-current converter comprises two low-voltage switching tubes, an isolator and a low-voltage direct-current source. The digital control unit selects the main loop or the synchronous direct-current converting circuit automatically to work according to the voltage change of a high-voltage direct-current bus, and provides stable DC output.