A non-linear 3D printed electromagnetic vibration energy harvester

[摘要] This paper describes a novel electromagnetic energy harvester that exploits the low flexural modulus of ABS and comprises of a nonlinear mechanism to enhance the generated power and bandwidth. The device is printed using desktop additive manufacturing techniques (3D printing) that use thermoplastics. It has a 'V' spring topology and exhibits a softening spring non-linearity introduced through the magnetic arrangement, which introduces a monostable potential well. A model is presented and measurements correspond favourably. The produced prototype generates a peak power of approximately 2.5mW at a frame acceleration of 1g and has a power bandwidth of approximately 1.2→1.5Hz and 3.5→3.9Hz during up and down sweeps respectively. The device has a power density of 0.4mW/cm3at a frame acceleration of 1g and a density of 0.04mW/cm3from a generated power of 25μW at 0.1g.

[发布机构] Micropower Systems and Nanomagnetics Group, Micro-Nano Systems Centre, Tyndall National Institute, Lee Maltings, Dyke Parade, Cork, Ireland^1

[效力级别] 能源学

[关键词] Electromagnetic vibrations;Flexural modulus;Magnetic arrangements;Manufacturing techniques;Nonlinear mechanisms;Potential wells;Power densities;Softening springs