Protection circuit for electrical discharge machining power supp

Details Protection circuit for electrical discharge machining power supp Protection circuit for electrical discharge machining power supp

1979-05-24

1981-05-12

Shaw, C. C.

Electric heating

Metal heating

Cutting or disintegrating

219 69C, B23P 102

Patent

active

042674239

ABSTRACT:
Gap current is sensed and a voltage signal representative of gap current is integrated to provide a relatively stable DC voltage that is proportional to average current at the gap. A reference setting is made to which the average gap current is compared and, responsive to rise in current above that level, cutoff of the power supply will be initiated.

REFERENCES:
patent: 3778579 (1973-12-01), Takarada
patent: 3805012 (1974-04-01), Bell, Jr. et al.
patent: 3816692 (1974-06-01), Ratmansky
patent: 3825713 (1974-07-01), Bell, Jr.

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