Interleaved Four-Phase Buck-Based Current Source With Isolated Energy-Recovery Scheme for Electrical Discharge Machining

Ray Lee Lin, Cheng Ching Hsu, Shih Kuen Changchien, Shih Kuen Changchien

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

This paper presents the interleaved four-phase buckbased current source in continuous conduction mode with proposed isolated energy-recovery scheme for electrical discharge machining (EDM). EDM requires a pulse currentwith high slew rate in the output current of the current source. The interleaving technique allows the output slew rate of the buck-based current source to be improved due to the existence of the paralleled inductors at the start of discharge. The proposed isolated energy-recovery scheme provides a major path for the inductor to release its stored energy, thus avoiding high voltage stress in the output terminal when the gap reverts to the high-impedance state. The energy stored in he inductor is recycled to the input capacitor and can be reused for machining. The experimental results validate that the output current slew rate is high and that the energy is recovered when the gap is in the high-impedance state.

Original languageEnglish
Pages (from-to)1788-1797
Number of pages10
JournalIEEE Transactions on Power Electronics
Volume24
Issue number7
DOIs
Publication statusPublished - 2009 Jul

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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