Linear current source as a power generator for the spark erosion process

This article discusses common circuit designs for power supplies used in spark erosion machines. The author proposes the use of a linear current source as a generator. Moreover, he presents several solutions of electronic controlled current sources based on an operational amplifier and a power Mosfet transistor. One of the solutions has been selected for further tests, including verification with the LTspice simulation program. This article also presents DC analysis as well as transient analysis results, based on which it can be concluded that the circuit selected can be employed as a pulse generator for a spark erosion machine. Moreover, the author looks at results of laboratory tests performed on a current source prototype and discusses the advantages and disadvantages of the proposed solution relative to a typical transistor-based power supply unit.