Full-range variable and modulatable, waveform front edge-variable, direct-current, high-voltage and high-frequency switching power source and control method thereof

The invention discloses a full-range variable and modulatable, waveform front edge-variable, direct-current, high-voltage and high-frequency switching power source and a control method thereof. The direct-current, high-voltage and high-frequency switching power source comprises a three-phase alternating-current rectification and filtering circuit, a full-bridge inverter circuit, high-frequency isolation transformers, AC-DC modules, a first microprocessor, a driving circuit, a PSM power source control system and a signal isolation and sampling circuit; a three-phase alternating-current power source is connected with the full-bridge inverter circuit through the three-phase alternating-current rectification and filtering circuit; the full-bridge inverter circuit is connected with the primary sides of the 59 identical high-frequency isolation transformers; the output of the high-frequency isolation transformers is connected with the AC-DC modules; the AC-DC modules comprise field-effect transistors which control