Innovative Energy Harvester Design Using Bistable Mechanism With Compensational Springs In Gravity Field

[摘要] The purpose of the presented work is to introduce the novel design of electrostatic energy harvester using bistable mechanism with compensational springs in gravity field capable of providing the output of several μW under the excitation of extremely small amplitude (up to 0.2g) and low frequency (10-100Hz). Presented energy harvester uses the bistable hysteresis modification to achieve low-frequency low-amplitude sensibility. It was demonstrated with finite element modelling (FEM) that hysteresis width produced by bistability is changing with a constant linear coefficient as a function of a compensational spring stiffness and thus a device sensitivity could be adjusted to the minimum point for the amplitude of external excitation. Further, highly non-linear bistable double curved beam mechanism assures the high sensitivity in frequencial domain due to the non-defined bandwidth. The equivalent circuit technique is used for simulating the device performance.

[发布机构] Centre for Nanoscience and Nanotechnology (C2N) - Site d'Orsay, Univ. Paris-Sud, Université Paris-Saclay, Bat. 220, Rue Ampere, Orsay; 91405, France^1;Laboratoire Mécanique des Sols, Structures et Matériaux, Centrale Supélec, Université Paris-Saclay, Chatenay-Malabry; F-92295, France^2

[效力级别] 能源学

[关键词] Bistable mechanisms;Device performance;Device sensitivity;Electrostatic energies;Energy harvester designs;External excitation;Finite element modelling;Linear coefficients