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Title: High voltage pulse generator. [Patent application]

Abstract

An improved high-voltage pulse generator is described which is especially useful in ultrasonic testing of rock core samples. An N number of capacitors are charged in parallel to V volts and at the proper instance are coupled in series to produce a high-voltage pulse of N times V volts. Rapid switching of the capacitors from the paralleled charging configuration to the series discharging configuration is accomplished by using silicon-controlled rectifiers which are chain self-triggered following the initial triggering of the first rectifier connected between the first and second capacitors. A timing and triggering circuit is provided to properly synchronize triggering pulses to the first SCR at a time when the charging voltage is not being applied to the parallel-connected charging capacitors. The output voltage can be readily increased by adding additional charging networks. The circuit allows the peak level of the output to be easily varied over a wide range by using a variable autotransformer in the charging circuit.

Inventors:
Publication Date:
OSTI Identifier:
7339398
Assignee:
Energy Research and Development Administration
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; HIGH-VOLTAGE PULSE GENERATORS; DESIGN; ROCKS; ULTRASONIC TESTING; CAPACITORS; ELECTRIC DISCHARGES; THYRISTORS; TIMING CIRCUITS; TRIGGER CIRCUITS; ACOUSTIC TESTING; ELECTRICAL EQUIPMENT; ELECTRONIC CIRCUITS; ELECTRONIC EQUIPMENT; EQUIPMENT; FUNCTION GENERATORS; MATERIALS TESTING; NONDESTRUCTIVE TESTING; PULSE CIRCUITS; PULSE GENERATORS; SEMICONDUCTOR DEVICES; TESTING; 420500* - Engineering- Materials Testing; 420800 - Engineering- Electronic Circuits & Devices- (-1989)

Citation Formats

Fasching, G E. High voltage pulse generator. [Patent application]. United States: N. p., 1975. Web.
Fasching, G E. High voltage pulse generator. [Patent application]. United States.
Fasching, G E. Thu . "High voltage pulse generator. [Patent application]". United States.
@article{osti_7339398,
title = {High voltage pulse generator. [Patent application]},
author = {Fasching, G E},
abstractNote = {An improved high-voltage pulse generator is described which is especially useful in ultrasonic testing of rock core samples. An N number of capacitors are charged in parallel to V volts and at the proper instance are coupled in series to produce a high-voltage pulse of N times V volts. Rapid switching of the capacitors from the paralleled charging configuration to the series discharging configuration is accomplished by using silicon-controlled rectifiers which are chain self-triggered following the initial triggering of the first rectifier connected between the first and second capacitors. A timing and triggering circuit is provided to properly synchronize triggering pulses to the first SCR at a time when the charging voltage is not being applied to the parallel-connected charging capacitors. The output voltage can be readily increased by adding additional charging networks. The circuit allows the peak level of the output to be easily varied over a wide range by using a variable autotransformer in the charging circuit.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1975},
month = {6}
}