| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a generator for efficiently generating discharge pulses having freely selectable ignition voltages. SOLUTION: This method and the generator for generating a time sequence of EDM pulses having a predetermined ignition voltage for electrical discharge machining. An AC voltage is generated from a DC voltage, furnished by a bipolar current source 8-17. The AC voltage is applied to an isolating transformer 27 disposed between the bipolar current source 8-17 and the spark gap EL or WS. A first pulse capacitor 47, 48, 61 or 62 is charged by the bipolar current source 8-17 to a voltage corresponding to the ignition voltage. The ignition voltage provided by the isolating transformer 27 is switched with a selected polarity to the spark gap EL or WS. COPYRIGHT: (C)2007,JPO&INPIT
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