Capacitor-type pulse generator for electrical discharge machinin

Details Capacitor-type pulse generator for electrical discharge machinin Capacitor-type pulse generator for electrical discharge machinin

1981-02-25

1984-04-10

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69S, 219 69P, B23P 108

Patent

active

044423330

ABSTRACT:
A capacitor-type pulse generator is provided for wire-cutting EDM. The generator includes a capacitor connected on one hand to a DC source in series with a charging switch and on the other hand to the EDM gap in series with a discharging switch. A first sensing circuit turns the discharging switch into conduction when the charging voltage on the capacitor reaches a predetermined level. The charging switch is normally in its conductive state and is turned into its nonconductive state when a second sensing circuit senses that the EDM gap voltage exceeds a preselected value. In a modified generator, parallel-connected discharging switches are triggered in sequence when the capacitor voltage reaches the predetermined level.

REFERENCES:
patent: 3697719 (1972-10-01), Verner et al.
patent: 3878437 (1975-04-01), Cuker
patent: 3956609 (1976-05-01), Marendaz
patent: 4163887 (1979-08-01), Buhler et al.
patent: 4303957 (1981-12-01), Bell, Jr. et al.

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