Optimized output voltage of flux compression generators by modified detonation method

Flux Compression generators are widely used to achieve extreme high power pulses. In this method, after generation of current pulses flowing through an inductor, the chemical energy of an explosive is used to increase the power of the output voltage pulse applied to the load. During the transferring energy of the explosive to the output electrical pulse, the critical issue is to achieve the change of the inductance in a fast and controlled way. The current gain of such systems is strongly dependent on the time variation of the changeable inductance. The rate of the output current increase is approximately proportional to the rate of inductance reduction. This rate is determined by mass of explosive and dimensions of the detonation cylinder. There is no unique mathematical function by which the inductance transits from its initial value (L0) to its final value (Lf), different functions can be realized by changing the physical dimensioning and design of FCG. In this paper, the optimized function for L (t) to achieve the smallest rise time of the output current is calculated. Based on material deformation simulations, the corresponding design of FCG to realize the optimum function of L(t) is proposed.