Electromagnetic type vibration energy harvester based on bi-stable cantilever beam

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (23) : 126-133.

LIU Zhonglin, LENG Yonggang, LIU Jinjun, FAN Shengbo

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Abstract

The bi-stable cantilever beam-based electromagnetic type vibration energy harvester built with dual-magnet structure was taken as the study object, the shape correction function method and the magnetizing current theory were adopted to analyze the bi-stable cantilever beam’s vibration response features.According to the electromagnetic induction principle, the accurate simulation method for electromagnetic induction electromotive force under moving coordinate system was explored.The results of numerical simulation and test verification showed that the established nonlinear magnetic force, magnetic field analysis and simulation computation for cantilever beam’s vibration response and induced electromotive force are reasonable and correct; the proposed method can be used to effectively evaluate the bi-stable cantilever beam-based electromagnetic type vibration energy harvester’s induced electromotive force and output power.

Key words

bi-stable cantilever beam / energy harvesting / electromagnetic / nonlinear

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LIU Zhonglin, LENG Yonggang, LIU Jinjun, FAN Shengbo. Electromagnetic type vibration energy harvester based on bi-stable cantilever beam[J]. Journal of Vibration and Shock, 2019, 38(23): 126-133

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