Over current protection system for electrical discharge machinin

Details Over current protection system for electrical discharge machinin Over current protection system for electrical discharge machinin

1979-03-26

1981-03-24

Shaw, C. C.

Electric heating

Metal heating

Cutting or disintegrating

219 69M, 219 69C, B23P 102

Patent

active

042582431

ABSTRACT:
The system responds to the frequency of pulses from the pulse generator or multivibrator. As the frequency of the pulses increases, they get closer together and the average voltage changes in a somewhat linear fashion. A final integrator amplifier stage is used to find the predetermined maximum current level for different frequency settings. Responsive to this level being exceeded, machining power is interrupted and the EDM operation interrupted.

REFERENCES:
patent: 3558998 (1971-01-01), Bertolasi
patent: 3623148 (1971-11-01), Berghausen
patent: 3627968 (1971-12-01), Sennowitz
patent: 3737615 (1973-06-01), Bell, Jr.
patent: 3805012 (1974-04-01), Bell, Jr. et al.

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