Improvement of electromagnetic energy transfer efficiency for radio frequency explosive magnetic flux compression generator

In order obtain the chemical energy of the explosive charges sufficiently and increase the transfer efficiency of the electromagnetic energy, this paper proposes that the max capacitor discharge current moment should be chosen as the detonation time of the radio frequency explosive magnetic flux compression generator. By comparing two radio frequency explosive magnetic flux compression generator detonations in different initial conditions, it can be conclude that maximum output current and chemical energy of the explosive charges are used sufficiently so that electromagnetic energy transfer efficiency is increased through this method.

I. Introduction

The basic work principle of radio frequency explosive magnetic flux compression generator (RF FCG) is that: a RF FCG converts the chemical energy stored in the explosives into electromagnetic energy by compressing the magnetic field between the stator coils and the armature which is driven by explosives. How to use the chemical energy of the explosive charges sufficiently and increase the electromagnetic energy transfer efficiency are the main factors of measuring working performance of RF FCG. For helical explosive magnetic flux compression Generator (HFCG), some methods that can increase electromagnetic energy transfer efficiency have been proposed by researchers. These methods, such as winding stator coil exponentially[1], controlling assembly tolerance[2],[3], indirectly charging[4],[5] and adopting multi-layer stator coil[6], are applied to RF FCG.