Pulse generator for treatment of metals - has several main circuits each connected at one end to separate primary winding of single low-induction pulse transformer

摘要

The generator generates work pulses for electrically removing metal by penetrating a work gap (5) defined by a pair of electrodes (6, 7). The generator comprises a voltage or current source (1), a number of main circuits being connected across the voltage or current source (1). Each main circuit contains a separate primary winding (1031, 1032, 103N) forming part of a single low-induction pulse transformer (100) for the generator. Each main circuit, also contains a first switch (T11, T21, TN1) serving to control current flow or pulse shape in the main circuit; an energy storing unit (31, 32, 3N) and a second switch (T12, T22, TN2) for producing an over-voltage in the main circuit in co-operation with the energy storing until (31, 32, 3N) and with the primary winding (1031, 1032, 103N) so that a work pulse penetrates the work gap (5). A third switch (T31, T32, T3N) is also induced for producing a steep trailing edge of the work pulse.