Experimental test for power generation performance of I-L composite piezoelectric beam energy harvester with magnetic nonlinear coupling
WANG Man1,2, HOU Chengwei1, MENG Jinpeng1, YANG Xiaohui1, SONG Rujun1
1. College of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China;
2. Supervision and Inspection Station for Drug and Instrument of Wuxi Joint Logistics Support Center, Nanjing 210000, China
Abstract：Here, aiming at problems of narrower energy capture frequency band and lower output of linear piezoelectric vibration energy harvester, an I-L composite piezoelectric beam energy harvester with magnetic nonlinear coupling was proposed. The energy harvester was composed of I-shaped piezoelectric beam with permanent magnet and L-shaped one. Different nonlinear magnetic coupling effects could be obtained by adjusting horizontal distance between the two permanent magnets. The test results showed that there is an optimal resistance to maximize output power of the piezoelectric energy harvesting(PEH) system; compared with the non-magnetic system, the resonance frequency of the proposed energy harvester has an obvious shift with I-type piezoelectric beam shifting to the left and L-type one shifting to the right to widen the energy capture frequency band of the system; when the excitation acceleration is 0.2g, the horizontal distance is 20 mm and the excitation frequency is 18.4 Hz, the proposed energy harvester can obtain the maximum output power of 1.2 mW.
王曼1,2，侯成伟1，孟金棚1，杨小辉1，宋汝君1. 磁力非线性耦合的I-L组合压电梁俘能器发电性能试验研究[J]. 振动与冲击, 2022, 41(3): 123-128.
WANG Man1,2, HOU Chengwei1, MENG Jinpeng1, YANG Xiaohui1, SONG Rujun1. Experimental test for power generation performance of I-L composite piezoelectric beam energy harvester with magnetic nonlinear coupling. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(3): 123-128.
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