A non-linear 3D printed electromagnetic vibration energy harvester

15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Constantinou, P.^1 ; Roy, S.^1

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

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

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/660/1/012092/pdf
DOI  :  10.1088/1742-6596/660/1/012092

来源: IOP

【 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.