Explosive-driven moving magnet generators

The results are presented of experimental studies of explosively driven moving magnet generators. The study was performed with the use of high explosive and propellant charge. The projectiles used were NdFeB cylinders with D = 2.5 cm and H = 1.9 cm. Data are given for amplitude of high current pulses for different designs of the devices. The experiments performed have shown that the best option for generators using a moving magnetic projectile is to utilize the energy of the gases formed as a result of burning of the explosive rather than the energy of a flyer plate accelerated under the action of burning of the explosive. The explosive of preference is not C-4, but a military propellent charge which shows a high burning velocity and a high energy of explosive gases.

I. Introduction

Moving magnet generators are compact pulsed power systems that are one of a type of explosive-driven pulsed power devices for production of initial energy. The generation of high current and high voltage pulses is the result of the motion of the ferromagnetic projectile inside of pulse generating coils. In our early publication devoted to studies of kinetic energy conversion with a light gas gun it a high efficiency of open ferromagnetic circuit moving magnet generation was shown [1]. Detailed studies of the current mode of moving magnet generation with the use of a gas gun is presented in [2]. In this work the experiments were performed with explosive driven moving magnet generators (EDMMG) of different designs using high explosives (HE) and propellent charge.