Abstract：This paper presents a new electromagnetic vibration-powered generator with a double-ends fixed annular permanent magnet spring. The wires are winded both inside and outside of the annular permanent magnet to form inner coil and outer coil, respectively. The input-output mathematical model of axial magnetization annular permanent magnet spring is built. Taking advantage of the model, the characteristic curve of the magnetic force versus the displacement of the movable magnet is obtained. The magnetic field distribution of the designed generator and the output voltage waveforms of the outer coil and inner coil are simulated by using finite element method (FEM). The simulated result of the magnetic force characteristic curve agrees with the analytical result obtained from the mathematical model. The natural frequency is calculated based on the magnetic force characteristic curve. The tested result of natural frequency of the magnet spring agrees with the calculated result. Tests results of the output voltage waveforms have good agreement with the simulation results. The maximum output power of the designed vibration-powered generator is 28.3 mW, and the open circuit RMS voltage is 5.1 V with the vibration frequency of 20 Hz and the amplitude of 5 mm.
杨晓光, 汪友华, 张波, 曹莹莹. 一种新型振动发电装置及其建模与实验研究[J]. 电工技术学报, 2013, 28(1): 113-118.
Yang Xiaoguang, Wang Youhua, Zhang Bo, Cao Yingying. A New Electromagnetic Vibration-Powered Generator and Its Model and Experiment Research. Transactions of China Electrotechnical Society, 2013, 28(1): 113-118.
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