FIELD: electro-erosion pulse treatment, pulse generators. SUBSTANCE: apparatus has power source of increased power to feed treated zone with high-frequency pulses of current, line of treatment inductance, that sends back its accumulated energy in zone of treatment. Generator has intermediate source of power in series connected with treated piece and electrode-tool in circuit of energy return. Generator also has means to guide returning energy from intermediate source into source of increased power. EFFECT: improved design. 6 cl, 12 dwg
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