Power source device for electric discharge machine
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United States of America Patent
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Sep 12, 2023
Grant Date -
Dec 2, 2021
app pub date -
Oct 31, 2018
filing date -
Oct 31, 2018
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A power supply device for an electric discharge machine includes a current supply unit for supplying a pulsed current to an electrode gap and a current regeneration unit for regenerating the current. The current supply unit includes a DC power supply, a first switching element, and a second switching element. The current regeneration unit includes a capacitor arranged between a first connection point between an electrode and the first switching element and a second connection point between a workpiece and the second switching element, and a third switching element which is arranged between a third connection point between the first connection point and the DC power supply and a fourth connection point between the second connection point and the capacitor and which is turned on from the start of current regeneration until the current value reaches zero, whereby regeneration current fall time is reduced.
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