The Design of Voltage-Stacked Low Ripple Current-Driven EDM Pulse Power Supply

In aerospace, medical, and other high-end manufacturing fields, precision machining or surface treatment of materials is required frequently. Electrical discharge machining (EDM) technology is widely used in machining special materials and complex structures due to its high precision, quality, and efficiency. Pulse power supply is the core device for regulating EDM energy, and its ability to control discharge energy determines the machining quality and efficiency. A voltage-stacked low ripple current-driven EDM pulse power supply is proposed, combining the characteristics of rectifier circuits and multiphase interleaved buck circuits to generate high-voltage and current compound pulses. These pulses break through the gap between the electrode tool and the workpiece, forming a plasma machining channel and machining the workpiece. This article concludes with a discussion of the influence of the output waveform on the surface quality of the workpiece. It provides thoughts for parameter design to optimize voltage and current outputs, ensuring that they meet the design specifications of EDM.