Full-bridge soft switch medical X-ray machine high-voltage direct-current power supply

The invention discloses a full-bridge soft switch medical X-ray machine high-voltage direct-current power supply, which comprises a full-bridge inverter circuit, an LLC (Logical Link Control) serial resonance circuit, a high-frequency high-voltage transformer, a voltage doubling rectifying circuit and a control module. An LLC serial resonance technology is adopted for the full-bridge soft switch X-ray machine high-voltage direct-current power supply, and an overlapping region does not exist between voltage and current, so that soft switch is realized, the switching loss of a switch tube is lowered, the switching frequency and output power of the converter are further increased, and the direct-current power supply has the characteristics of small size and light weight; and moreover, frequency modulation control is adopted for the high-voltage direct-current power supply, and the output voltage is not influenced by the duty factor loss, so that the adjusting range of the output voltage is widened, and the performance of the X-ray machine power supply is enhanced.