20000G shock energy harvesters for gun-fired munition

16th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Willemin, J.^1,2 ; Boisseau, S.^1,2 ; Olmos, L.^1,2 ; Gallardo, M.^1,2 ; Despesse, G.^1,2 ; Robert, T.^3

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

关键词: Elastic potential energy;    Electromagnetic converters;    Maximum output power;    Mechanical oscillations;    Output power;    Resonant structures;    Shock energy;    Test benches;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/773/1/012084/pdf
DOI  :  10.1088/1742-6596/773/1/012084

来源: IOP

【 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.