Conceptual design for a periodic permanent magnetic ring magnetic flux compression generator

Abstract

In a lot of single-shot applications and experiments at remote locations where helical magnetic flux compression generator (HMFCG) provides the most practicable power, it is impracticable or inconvenient to use a capacitor bank to be the initial energy source. Homogenous permanent magnet has been used to be the initial energy source to drive HMFCG, but the energy density stored in a single permanent magnet is very low. The possibility of using periodic permanent magnetic ring structure(PPMR) to be initial energy source of an MFCG was analyzed theoretically and numerically. It was concluded that 1kJ initial energy can be provided to an HMFCG by the PPMR which weights less than 30kg and the outside radius less than 30 cm. In this paper, an axially detonated PPMR HMFCG structure is put forward and studied numerically, and its current amplification expression is reduced. Meanwhile some numerical examples for such an HMFCG are also provided. It is concluded that an experimental investigation of such an HMFCG design is worthwhile.