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Power source for electric discharge machining

  • US 5,149,931 A
  • Filed: 03/30/1990
  • Issued: 09/22/1992
  • Est. Priority Date: 04/11/1989
  • Status: Expired due to Term
First Claim
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1. A power source for an electric discharge machining in which voltage is applied across an electrode and a workpiece to be machined to cause electric discharge in an interelectrode gap formed between said electrode and said workpiece to thereby machine said workpiece, comprising:

  • an AC source for applying an AC voltage to an interelectrode gap having a capacitance; and

    a resonance circuit, for causing resonance to occur with the capacitance, whereby an electric discharge machining is carried out under an occurrence of resonance.

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