Electric heating – Metal heating – Cutting or disintegrating
Patent
1988-06-21
1989-09-05
Pellinen, A. D.
Electric heating
Metal heating
Cutting or disintegrating
219 6913, B23H 102
Patent
active
048640921
ABSTRACT:
An electric discharge machining power source is provided which charges a capacitor connected in parallel with an electrode and a work, and applies a charge voltage between the electrode and the work to cause electric discharge, thereby performing electric discharge machining. The machining power source allows rapid charging of the capacitor and is inexpensive while the power source efficiency is improved. A switching element is arranged in the charge circuit of the capacitor which is capable of being turned on and off. The switching element connects the capacitor to a direct current power source and charges the capacitor. A flywheel circuit including an inductance and a diode is provided in the charge circuit. A reverse voltage that is caused by a stray inductance in the electric discharge circuit during electric discharge is applied to the capacitor as a positive voltage through the flywheel circuit.
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Evans Geoffrey S.
Fanuc Ltd.
Pellinen A. D.
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