The parameters and energy amplification of compression generator with iron-free rotor defined by the magnetic field simulation

Abstract

The paper contains the further consideration of the idea to use the rotating pulsed generator with iron-free rotor which was discussed briefly in the poster presented on the IEEE Pulsed Power Conference 1997 and in the poster of 8th EML 1997, both not published. The estimations made previously with application of both mathematic simulation and measurements on the small laboratory model have yielded low coefficient of total inductance variation (on the level 10-15 instead of 300-400 and more for completely iron machines). Now the modeling of a bigger sample of generator is done with the following dimensions: rotor diameter 0.25 m, active length 0.425 m and rotation frequency 6000 rpm. The results have enabled the possibility to reach the value of this coefficient near 120 at the increased density of initial magnetic energy for excitation in the space occupied by the rotor, equal to 1.6 MJ/m/sup 3/, and increased volume of the excitation field. The output energy in the ohmic load of the generator considered is equal to 2.14 MJ, what is near 34% of peak total magnetic energy.