Method and generator for electrical discharge machining
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United States of America Patent
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Oct 19, 2010
Grant Date -
Feb 22, 2007
app pub date -
Jul 31, 2006
filing date -
Aug 1, 2005
priority date (Note) -
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Abstract
The invention relates to a method and generator for generating a time sequence of EDM pulses having a predefined ignition voltage for electrical discharge machining. An AC voltage is generated from a DC voltage, furnished by a bipolar current source. The AC voltage is applied to an isolating transformer disposed between the bipolar current source and the spark gap. A first pulse capacitor is charged by the bipolar current source to a voltage corresponding to the ignition voltage. The ignition voltage provided by the isolating transformer is switched with a selected polarity to the spark gap.
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