Inverter-type power supply circuit for electrical machining

Details Inverter-type power supply circuit for electrical machining Inverter-type power supply circuit for electrical machining

1981-04-15

1984-05-08

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69P, 363 34, 363 37, 363 71, B23P 108

Patent

active

044476957

ABSTRACT:
An inverter-type power supply circuit for electrical machining comprising a plurality of AD-DC-HF-DC (PULSE) inverters jointly connected between a common source of commercial alternating current and a single electrical machining gap. A common pulsing means is provided for the individual switches in these plural inverter circuits for providing thereto in unison a succession of time-spaced groups (Ton, Toff) of elementary signal pulses to provide across said gap concurrent occurring channels of time-spaced groups (Ton, Toff) of elementary machining pulses (.tau.on, .tau.off) which channels are superimposed upon one another across the machining gap. The plural inverter circuits include individual high-frequency transformers each of which, or a portion of which, has a plurality of settings for transforming the original voltage to a desired output voltage level which settings are selectively established to selectively establish the desired voltage and current characteristics of the superimposed elementary machining pulses in time-spaced groups.

REFERENCES:
patent: 3268900 (1966-08-01), Hirata
patent: 3325716 (1967-06-01), Gomi
patent: 3360683 (1967-12-01), Inoue
patent: 3461310 (1969-08-01), Pintell
patent: 3596038 (1971-07-01), Hockenberry
patent: 3655936 (1972-04-01), Saito et al.
patent: 4017705 (1977-04-01), Bazhenov et al.
patent: 4151388 (1979-04-01), Bell, Jr. et al.
patent: 4222098 (1980-09-01), Nagano

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