Energy Harvesting with Single-layer and Stacked Piezoelectret Films
Energy Harvesting with Single-layer and Stacked Piezoelectret Films
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DOI：
10.1109/tdei.2015.7116339
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发表时间：
2015-06-01
影响因子：
3.1
通讯作者：
Melz, Tobias
中科院分区：
文献类型：
--
作者：
Pondrom, Perceval;Hillenbrand, Joachim;Melz, Tobias
讨论了基于振动的单层或多层(叠层)驻极体薄膜的能量采集。首先，建立了这种能量收集的力学和电学模型，并推导了产生电荷、电流、电压和功率的方程。特别是，电角频率等于胶片叠层的机械共振频率与地震质量相结合的情况是重要的，因为在该频率下采集会产生最大的发电功率。然后，给出了单层和叠层驻极体薄膜收割机的实验结果。这些数据证实了预测的发电功率与终止电阻、频率、地震质量、加速度和堆叠中的薄膜层数的关系。当加速地震质点产生的压电层上的应力大于3kPa时，产生的功率随应力呈非线性增加。当加速度为9.81m/S(2)，地震质量为40g时，单层压电驻极体获得的最大功率为18微瓦，三层收割机的最大功率增加了近3倍。
Vibration-based energy harvesting with single- or multiple-layer (stacked) piezoelectret films is discussed. First, a mechanical and an electrical model for this kind of energy harvesting is established and equations for the generated charge, current, voltage, and power are derived. In particular, the case where the electrical corner frequency equals the mechanical resonance frequency of the film stack combined with the seismic mass is of importance since harvesting at this frequency results in maximal generated power. Then, experimental results for harvesters with single layers and with stacks of piezoelectret films are presented. The data confirm the predicted dependence of the generated power on terminating resistance, frequency, seismic mass, acceleration, and number of film layers in the stack. If the stress on the piezoelectret layers, generated by the accelerated seismic mass, is larger than 3 kPa, a nonlinear increase of the generated power with stress is observed. The maximum power harvested with a single-layer piezoelectret is 18 mu W for an acceleration of 9.81 m/s(2) and for a seismic mass of 40 g. A three-layer harvester yields an increase of the maximum power close to a factor of root 3.