A Micro-energy w-EDM Power Source Based on High-frequency Spark Erosion for Making Diamond Heat-Sink Arrays

Shun Tong Chen*, Li Wen Huang


研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)


Diamond is a typical super-hard material with very high thermal conductivity. This makes is highly suited to heat dissipation from electronic microchips. The stability of its chemical lattice structure, however, means it has no free-electrons and a high melting point, making machining of diamond difficult. In this study, a micro-energy w-EDM (wire-Electric Discharge Machining) power source with dual-capacitance is designed for using high-frequency spark erosion to precisely cut boron-doped nano-polycrystalline diamond (B-NPD) material. The power source design consists of a dual-capacitance circuit, a programmable logic circuit (PLC), and a metal–oxide–semiconductor field-effect transistor (MOSFET). By utilizing a high-frequency switching dual-capacitance circuit, each capacitor has enough charge/discharge time to create a micro-energy pulse train of uniform iso-pulse on-time (τon) and iso-pulse peak current (Ip). Material removal occurs rapidly so that micro-quantities of diamond are readily removed to reduce the probability of thermal damage and graphitization. The technique allowed successful machining of a highly consistent plate-finned diamond heat-sink array and trapezoid-pillar diamond heat-sink array. Furthermore, manufacturing using the designed low-energy power-source is highly efficient. To estimate machining efficiency in terms of the content of charge per unit volume per unit of time in diamond cutting, “Charge Density (CD)” is proposed and examined as an evaluation criterion. The following are all discussed in detail: work frequency, work capacitance, wire-electrode number and short-circuiting percentage, heat-erosion on fins of different thicknesses, and fin efficiency.

頁(從 - 到)1267-1283
期刊International Journal of Precision Engineering and Manufacturing - Green Technology
出版狀態已發佈 - 2022 9月

ASJC Scopus subject areas

  • 可再生能源、永續發展與環境
  • 材料科學(全部)
  • 機械工業
  • 工業與製造工程
  • 技術與創新管理


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