期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 205, 期 -, 页码 47-52出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2013.10.005
关键词
Energy harvester; 20 vibration energy harvesting; Magnetoelectric transducer; Nonlinear vibration
资金
- National Natural Science Foundation of China [61174017]
- National High Technology Research and Development Program of China [2012AA040602]
This paper presents a design for a novel vibration energy harvester using a magnetoelectric (ME) transducer, which is efficiently applicable in two-dimensional (2D) motion and over a range of vibration frequencies. This harvester adopts a circular cross-section cantilever rod to extract the ambient vibration energy because of its ability to host accelerations in arbitrary motion directions. Moreover, the magnetic interactions between the magnets and the ME transducer will lead to the nonlinear oscillation of the rod with increased frequency bandwidth. The influences of the nonlinear vibration factor and magnetic field distribution on the electrical output and bandwidth of the harvester are investigated to achieve optimal vibration energy harvesting performances. The experimental results showed that, the harvester was sensitive to the vibration with arbitrary in-plane directions. With an acceleration of 0.6 g (where g = 9.8 ms(-2)), it had the working bandwidths of 4.2 Hz, 2.6 Hz, 2.3 Hz, 2.5 Hz and 3.2 Hz, and the output powers of 0.6 mW, 0.49 mW, 0.33 mW, 0.5 mW and 0.56 mW at the in-plane excitation angles of-90 degrees, 45 degrees, 0 degrees, 45 degrees and 90 degrees, respectively. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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