Pulse generator spark-erosive metal working

Details Pulse generator spark-erosive metal working Pulse generator spark-erosive metal working

1987-11-13

1988-08-23

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

323287, 363 21, B23H 714, G05F 144, H02M 3335

Patent

active

047662816

ABSTRACT:
A pulse generator for spark-erosive metal working contains a charge regulator circuit for charging a storage capacitor. A storage capacitor is sinusoidally discharged across a switching device to a spark gap. Charging always occurs in a defined manner independently of the preceding pulses, so that uniform pulses can be generated. The storage capacitor is charged with an energy excess of required for discharge and the energy still remaining after spark discharge is recovered in a d.c. voltage source. The switching device (3) is non-conductive only when the discharge current has substantially decayed.

REFERENCES:
patent: 3745444 (1973-07-01), Calkin et al.
patent: 3832510 (1974-08-01), Pfau et al.
patent: 4678885 (1987-07-01), Dresti et al.
patent: 4713516 (1987-12-01), Buhler et al.

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