Quasi-resonant soft switching push-pull converter and working method thereof

The invention provides a quasi-resonant soft-switching push-pull converter, and the converter comprises a half-bridge push-pull conversion circuit which is used for converting a low-voltage DC power signal into a high-frequency low-voltage pulse power signal; the primary side of the high-frequency transformer is connected with the half-bridge push-pull conversion circuit so as to amplify the high-frequency low-voltage pulse power supply signal into a high-frequency high-voltage pulse power supply signal at an equal turn ratio; the LC resonance circuit is connected with one end of the secondary side of the high-frequency transformer; and the rectification filter circuit is connected with the LC resonance circuit and the other end of the secondary side of the high-frequency transformer so as to convert the high-frequency high-voltage pulse power supply signal into a smooth high-voltage direct-current power supply signal. According to the invention, the current stress is zero when the switching tube is turned on