Power supply device for electrical discharge machine
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United States of America Patent
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Aug 25, 2015
Grant Date -
Oct 30, 2014
app pub date -
Nov 30, 2011
filing date -
Nov 30, 2011
priority date (Note) -
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Abstract
The present invention includes a series circuit that includes a DC power supply and a switching element for supplying a DC or AC current pulse to a machining gap between a machining electrode and a workpiece; and a control unit that controls the switching element, wherein when generating a current pulse having a triangular shape by an inductance present on the series circuit, the control unit controls on-time and off-time of the switching element such that a peak value of an arbitrary current pulse in a pulse train including a plurality of current pulses changes.
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