Repulsively driven frequency-increased-generators for durable energy harvesting from ultra-low frequency vibration.
Repulsively driven frequency-increased-generators for durable energy harvesting from ultra-low frequency vibration.
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DOI：
10.1063/1.4870799
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发表时间：
2014-04
期刊：
影响因子：
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通讯作者：
Q. Tang;Yongliang Yang;Xinxin Li
中科院分区：
文献类型：
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作者：
Q. Tang;Yongliang Yang;Xinxin Li
研制了一种电磁动能采集器，它可以将超低频运动和振动能量转化为电能。该收割机采用两级振动结构，收集低频动能，并通过一对高频谐振发电机有效地将其转化为电能。在此，第一级滑动振子利用非接触磁斥力驱动第二级谐振器进行上变频谐振。非接触致动有助于装置的持久和长寿命工作。制作了原型器件，并通过实验测试验证了设计的正确性。该收割机可以在低至0.25Hz的频率下良好地工作。在0.5Hz、1g的驱动加速度下，该小型收获机的峰值功率为4.42mW，平均功率为158 μW。
An electromagnetic kinetic energy harvester has been developed, which can convert ultra-low-frequency motion and vibration energy into electrical power. This harvester employs a two-stage vibratory structure to collect low-frequency kinetic energy and effectively transfer it into electric power by using a pair of high-frequency resonant generators. Non-contact magnetic repulsive force is herein utilized for the 1st-stage sliding vibrator to drive the 2nd-stage resonators into frequency-up-conversion resonance. The non-contact actuation is helpful for durable and long-life working of the device. The prototyped device is fabricated and the design is well confirmed by experimental test. The harvester can be well operated at the frequency as low as 0.25 Hz. Under driving acceleration of 1 g at 0.5 Hz, the miniaturized harvester can generate a peak power of 4.42 mW and an average power of 158 μW.