Piezoelectric Energy Harvesting
Piezoelectric Energy Harvesting
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DOI：
10.5772/64162
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发表时间：
2016-08
期刊：
影响因子：
--
通讯作者：
H. Maiwa
中科院分区：
文献类型：
--
作者：
H. Maiwa
讨论了振动能量采集中压电材料的选择和电路设计。利用PZT基和BT基压电陶瓷制作了单压电晶片能量采集装置，并对该装置的性能进行了评价。器件的输出电压和功率取决于振荡的幅度和频率，并取决于负载电阻。通常，PZT基陶瓷对于压电能量收集应用是上级的。讨论了材料的优值，为压电材料的选择提供了指导。压电电压系数g31被认为是预测最大电压的良好参数。另一方面，d31 g31/tanδ、k312 Qm和d31 g31接近于最大功率的行为。将压电单晶片与电源管理电路相结合，产生恒压输出，作为电源。
The piezoelectric material selection and the circuit design in vibrational energy harvesting are discussed. The performances of the energy-harvesting unimorph devices that captured frequencies of 60 Hz by using piezoelectric PZT-based and BT-based ceramics were evaluated. Output voltages and power from the devices depend on the amplitude and the frequency of the oscillations, and depend on the load resistance. Generally, PZT-based ceramics are superior for piezoelectric energy-harvesting applications. The figures of merit of the materials are discussed in order to provide the guidelines of the piezoelec‐ tric material selections. Piezoelectric voltage coefficient, g 31 , is considered to be good parameter to predict the maximum voltages. On the other hand, d 31 g 31 /tanδ, k 312 Q m and d 31 g 31 are close to the behavior of the maximum power. Combination of the piezoelectric unimorph and power management circuit produced the constant voltage output, which would be used as the power sources.