High-frequency and high-voltage direct-current switching power supply based on current source mode

The utility model discloses a high-frequency and high-voltage direct-current switching power supply based on a current source mode. The high-frequency and high-voltage direct-current switching power supply comprises a voltage source module, an inductive circuit unit, an inverter module and a rectifying module, wherein the voltage source module comprises a three-phase alternating-current power supply, a three-phase phase-control rectifying bridge, a first inductor and a first capacitor, the inductive circuit unit comprises a first power resistor, a second power resistor, a diode, a second capacitor and a second inductor, the inverter module comprises an inverter bridge and an inverter transformer, and the rectifying module comprises a rectifying bridge and a third capacitor. The dynamic characteristic of a high-voltage output end of the switching power supply disclosed by the utility model presents a characteristic approximate to a constant-current source, a traditional high-frequency and high-voltage output f