Miniaturized Setback Generators Using Ring-Shaped Magnet for Power Supply of Small-Caliber Electronic Fuze

Yoon, Sang-Hee

Journal of the Korea Institute of Military Science and Technology 2005;8(2):58-66.

Sang-Hee Yoon

원환형 영구자석을 이용한 관성력 발전장치 소형화 설계

윤상희

국방과학연구소 기술연구본부

Abstract

This paper presents miniaturized setback generators based on the conversion of mechanical energy into electrical energy for military applications, especially power supply for electronic fuzes. In order to minimize the volume of setback generators, a ring-shaped magnet enclosing a coil assembly is adopted. A mechanical safety system, shear plate, is used as a release mechanism of the setback generators to prevent the generators from operating accidentally. The setback generators are intended not to ignite an electrical detonator but to charge a capacitor which is capable of driving electronic circuit of fuze. We design the setback generators using the simulation results of an electromagnetic analysis tool, $Maxwell^{(R)}$ 2D. In experimental study, we perform safety tests of the shear plate and firing tests of the fabricated setback generators. The present setback generators show that the voltage of 14.2V is charged at the capacitor of $30{mu}F$ within the charging time of 0.68msec and the critical acceleration for safety is 5,000G, thus verifying that the setback generators with a ring-shaped permanent magnet can be applicable to the power supply of small-caliber electronic fuze.

Key Words: Electronic Fuze, Firing Test, Miniaturization, Setback Generator, Shear Plate