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- W4384343480 abstract "Linear magnetic energy harvester has been previously proposed to achieve low-frequency ambient magnetic field. However, its harvesting efficiency is relatively low in the off-resonant frequency region. The paper proposes a nonlinear tristable magnetic energy harvester (TMEH) and analyzes the sensitivity of the dynamic characteristics of the TMEH to the system parameters. The nonlinear magnetic force between magnets is quantitatively analyzed using magnetic dipole method. Meanwhile, the magnetic moment form the external ac magnetic field is derived. Sequentially, a magneto-mechano-electric (MME) coupled model for TMEHs is developed using Euler Bernoulli-beam theory and the extended Hamilton principle. The developed theory is highlighted with a direct comparison with experiments that shows their close agreement. It is revealed that a high-performance tristable system can be obtained by adjusting gap distance or separate distance between magnets. In addition, the quantitative relation between the system parameters and the voltage output is determined. More importantly, the parameter region for the stiffness coefficients corresponding to different stable systems is discussed based on harmonic balance mothed, which offers convenience for performance improvement of the nonlinear harvesters. Given the significance of this study, it may be utilized in the development of high-performance magnetic energy harvesters." @default.
- W4384343480 created "2023-07-15" @default.
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- W4384343480 date "2023-09-01" @default.
- W4384343480 modified "2023-10-11" @default.
- W4384343480 title "A theoretical study on magneto-mechano-electric coupling of nonlinear tristable magnetic energy harvesters" @default.
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- W4384343480 doi "https://doi.org/10.1016/j.euromechsol.2023.105080" @default.
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