Load impedance estimation according to voltage and current oscillograms with programmable discharge of energy capacitance store

Programmable discharge of energy capacitance stores allows optimum regimes of energy emission in rail-gun and electric discharge launchers to be obtained. Characteristic peculiarity of programmable discharge regime is the voltage step change on the load at the moment of regular capacitance module switching on and the existence of several maximums on the current curve of the load in the time gap between modules switching on. Magnitude of the step on the voltage curve gives possibility to define existing inductance of the load. Voltage at the moment of current peak allows to estimate ohmic resistance of the load. The present work is the continuation of previous work (P. Yu. Emelin et al., 1994) and load parameters estimations obtained while treating programmable discharge of E7-25 energy capacitance store on the electric arc, initiated in air at atmospheric pressure are given. High-speed photography of the electric arc in the air has demonstrated correlation between measured are inductance and its form evolution.