20000G shock energy harvesters for gun-fired munition
[摘要] This paper presents a 20000G shock energy harvester dedicated to gun-fired munitions and based on a mass-spring resonant structure coupled to a coil-magnet electromagnetic converter. The 20000G shock energy is firstly stored in the spring as elastic potential energy, released as mass-spring mechanical oscillations right after the shock and finally converted into electricity thanks to the coil-magnet transducer. The device has been modeled, sized to generate 200mJ in 150ms, manufactured and tested in a gun-fired munition. The prototype sizes 117cm3and weighs 370g. 210mJ have been generated in a test bench and 140mJ in real conditions; this corresponds to a mean output power of 0.93W (7.9mW/cm3) and a maximum output power of 4.83W (41.3mW/cm3) right after the shock.
[发布日期] [发布机构] Univ. Grenoble Alpes, Grenoble; F-38000, France^1;CEA, Leti, Minatec Campus, 17 rue des Martyrs, Grenoble Cedex 9; 38054, France^2;Nexter Munitions, La Chapelle, Route de Villeneuve, La Chapelle Saint Ursin; 18570, France^3
[效力级别] 能源学 [学科分类]
[关键词] Elastic potential energy;Electromagnetic converters;Maximum output power;Mechanical oscillations;Output power;Resonant structures;Shock energy;Test benches [时效性]
