Electrical discharge power supply circuit

Details Electrical discharge power supply circuit Electrical discharge power supply circuit

1992-07-07

1994-07-12

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

B23H 102

Patent

active

053290887

ABSTRACT:
An electrical discharge machining power supply circuit for machining a workpiece, including: a power supply circuit; a first circuit including a first switching device and a first rectifying device; a second circuit including a second switching device and a second rectifying device; an electrical discharge machining electrode for providing an electrical discharge to the workpiece; and a first circuit device for preventing an excessive current generated by wiring inductance in the circuit from damaging at least the first switching device.

REFERENCES:
patent: 3087044 (1963-04-01), Inoue
patent: 3257583 (1966-06-01), Pfau
patent: 3777108 (1973-12-01), Maillet
patent: 4967054 (1990-10-01), Obara et al.
patent: 5083001 (1992-01-01), Kinbara et al.

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