Method and apparatus for controlling the power supply for electr

Electric heating – Metal heating – Cutting or disintegrating

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323282, B23H 100, G05F 140

Patent

active

055391788

ABSTRACT:
In a power supply apparatus of an electrical discharge machine, a power supply high in efficiency and small in current ripple is provided to achieve a power supply reduced in size and price. In addition, a switching power supply system is used jointly to generate an optional waveform. A first switching device is switched on/off in an optional cycle under the control of a current command value signal corresponding to the waveform shape of a current pulse to be supplied to a machining gap, whereby an optional shape of current pulse is supplied to the machining gap and a current component which compensates for a current ripple generated by said switching at the time of supplying said current is superimposed on said optional shape of current pulse and is supplied to the machining gap.

REFERENCES:
patent: 5126525 (1992-06-01), Kaneko et al.
patent: 5298709 (1994-03-01), Kaneko et al.
patent: 5345053 (1994-09-01), Kaneko et al.
patent: 5352859 (1994-10-01), Kaneko et al.
patent: 5378866 (1995-01-01), Taneda
patent: 5386095 (1995-01-01), Kaneko et al.
patent: 5399826 (1995-03-01), Kaneko et al.

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