Switched capacitor type pulse power supply for electrical discharge machining

The invention provides a switched capacitor type pulse power supply for electric spark machining, which comprises a switched capacitor type boost-buck circuit, a direct current voltage source, an FPGA control circuit and a driving circuit, and is characterized in that the switched capacitor type boost-buck circuit is used for gap breakdown and machining discharge of electric spark machining; the direct-current voltage source is used for outputting direct-current voltage to supply power to the switched capacitor type buck-boost circuit, the FPGA control circuit is used for providing a control signal for the driving circuit, and the driving circuit is used for amplifying the control signal output by the FPGA and then controlling on and off of a switching tube in the switched capacitor type buck-boost circuit. According to the invention, the boost-buck function can be realized, the problems of complex topology of a high-low voltage composite structure and output capacitance of a single-stage pulse power supply a