IMPULSE VOLTAGE GENERATION DEVICE

摘要

A high voltage generator (13) generates high voltage HVDC. A signal generator (33) generates a combined signal that is generated only in the period where supply of a pulse signal is effected, by superimposing a period setting signal whereof one cycle includes a pulse supply period and a pulse idling period, a pulse signal whose frequency is of a higher impulse repetition frequency than the frequency of the period setting signal and whose amplitude represents a voltage value that is lower than the high voltage HVDC value. A semiconductor switch (40) accumulates electric charge on a capacitative element (16) by means of the high voltage HVDC from the high voltage generator (13) when the voltage value of the combined signal is lower than the set gate voltage value and generates an impulse voltage whose peak value is the value of the high voltage HVDC, by means of the electric charge that is discharged from the capacitative element (16) when the voltage value of the combined signal exceeds the set gate voltage value. A test can be carried out in which the period of repetitive generation of stable impulse voltage and the period without generation of impulse voltage are put into effect alternately.