Simulation of electrical discharge machines power generator

Abstract

Electrical Discharge Machining (EDM) is a non-conventional material removal electro-thermal process EDM able to produce sufficient surface roughness that help in improving implant lifespan. In EDM process, power supply is one of the important elements in providing thermal action between the electrode and the work piece. A device for low discharge energy and current for EDM application is developed. It is essential to develop power supply unit capable of producing required discharge energy for proper machining process, high material removal rate and good surface finish. In this project a new design of power supply will be explored in an attempt to develop a low power generator for biomedical EDM.A new design specification for switching power supply (SMPS) of Electrical Discharge Machining (EDM) is proposed. The circuit design of SMPS is first described. The design of EDM pulse power supply based on switching circuit pulse width modulation current closed-loop principle has been initiated. Therefore, the efficiency of the new system is considerably increased, its weight and size is decreased much. Then, a MATLAB/SIMULINK modeling technique is employed to obtain low discharge energy and current for Micro-EDM biomedical application.