The transformer scheme of current zero and its break in technology of combined opening switch (vacuum interrupter and POS)

Abstract

Summary form only given, as follows. Summary form only given. The technology of power pulses on inductance storage consists of several parts connected among themselves. Formally they may be divided into three parts, first one combined opening switch (COS), second one the scheme of current zero and its break, third one the scheme of correlation of storage and a load COS consists of vacuum interrupter (VI) and plasma opening switch (POS) integrated in a single volume. The purpose of this technology is to raise the ratio of current passing time and current break time It is attained by increase of electrical strength of small-power VI vacuum gap up to electrical strength of POS by means of magnetic self insulation. The scheme of current zero and its break in action of COS is considered in this paper. Customary schemes of generation and current zero break do not fulfil necessary requirements-under energy output the scheme of current zero has to withstand the full voltage, which is created on a load. The impedance of current zero scheme has to be significantly higher than of load one. Current zero break must be realized with high degree of synchronizing. Therefore it is suggested to use a scheme based on interception of secondary transformer winding by primary one with magnetic flow conservation. Initially, under current zero creation, the scheme is common LC-circuit, where L-inductance of primary winding and capacitor is charged up to voltage U. After recovery of vacuum gap electrical strength (one of COS action stages), recharged capacitor C is discharged through secondary winding. In this case the time of current zero break depends only on inductance of transformer windings, coupling coefficient between them and capacitor C capacity.