A Shear-Mode Energy Harvesting Device Based on Torsional Stresses

作者：Kulkarni Vainatey^*; Ben Mrad Ridha; Prasad S Eswar; Nemana Sailendra

来源：IEEE/ASME Transactions on Mechatronics, 2014, 19(3): 801-807.

DOI：10.1109/TMECH.2013.2259635

• Energy harvesting
• piezoelectric materials
• shear mode

The shear-mode of a piezoceramic material offers improved energy harvesting potential as compared to other modes. This paper presents a concept of using torsional stresses induced by nonrotational vibrations in an energy harvesting device to produce electrical power. A finite-element model of this concept is presented to illustrate the principle and a prototype is demonstrated to validate the design. This prototype harvester is found to be capable of producing a maximum power of 0.57 mW at its resonant frequency of 620 Hz with a base acceleration of 1 g in amplitude. When compared to conventional cantilever harvester designs, this torsion-based harvester is found to suffer from fewer electrical power losses and has a greater potential in producing high power outputs.

• 出版日期2014-6