| 摘要 |
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.
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