Power source circuit for electric discharge machine

Details Power source circuit for electric discharge machine Power source circuit for electric discharge machine

1981-02-11

1983-07-26

Shaw, C. C.

Electric heating

Metal heating

Cutting or disintegrating

219 69C, 219 69S, B23P 102

Patent

active

043956122

ABSTRACT:
A power source circuit for use with an electric discharge machine which machines a workpiece by a discharge produced between an electrode and the work. When an arc forms in a working gap defined between the electrode and the work, the OFF period of a switching element inserted in the charging path of a capacitor for storing discharge energy is increased so that current flowing across the working gap is cut off for a longer period of time than in the case of a normal operation, thereby quickly restoring the insulating qualities of the gap following arcing.

REFERENCES:
patent: 3614368 (1971-10-01), Lobur
patent: 3697719 (1972-10-01), Verner et al.
patent: 3855443 (1974-12-01), Bell, Jr. et al.
patent: 4071729 (1978-01-01), Bell, Jr.
patent: 4292490 (1981-09-01), Bell, Jr. et al.
patent: 4303957 (1981-12-01), Bell, Jr. et al.

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