风致驰振型压电-电磁复合俘能器等效电路建模及参数影响分析

Equivalent Circuit Modeling and Parameter Analysis for Wind Galloping Piezoelectric-Electromagnetic Hybrid Energy Harvester

为了研究与标准直流接口电路相连的风致驰振型压电-电磁复合俘能器的发电性能,建立了风致驰振型压电-电磁复合俘能器的等效电路模型,利用电路仿真软件仿真分析了接口电路串联和并联配置、激励风速和负载电阻对压电-电磁复合俘能器输出功率的影响关系。结果表明,俘能器起振后,直流接口并联连接比串联连接具有更高的功率输出。对于并联接口电路,在低负载阻抗区,压电-电磁复合俘能具有比单一压电和单一电磁俘能更高的输出功率;在高负载阻抗区,压电-电磁复合俘能与单一压电俘能的输出功率相当,电磁俘能表现出对高阻抗负载的不适用性。本文参数化分析结果有助于理解连接标准直流接口电路的压电-电磁复合俘能器发电性能。

To study the electricity performance of the galloping piezoelectric-electromagnetic hybrid energy harvester(GP-EMHEH)with the standard DC interface circuits.An equivalent circuit model of the GP-EMHEH is developed.The circuit simulation software is used to analyze the effects of the series and parallel configurations of the standard DC interface circuits,the wind speed and the load resistance on the power outputs of the GP-EMHEH.The results show that when galloping,the harvester with the parallel DC interface circuits has higher power outputs than the harvester with the series DC interface circuits.When using the parallel DC interface circuits,in the region of low load resistance,the GP-EMHEH has higher power outputs than the galloping piezoelectric energy harvester(GPEH)and the galloping electromagnetic energy harvester.In the region of high load resistance,the GP-EMHEH has almost the same power outputs with the GPEH,which implies that electromagnetic energy harvesting is less efficient for powering high-resistance load.The studies provide a comprehensive understanding on the electrical performance of the GP-EMHEH with standard DC interface circuits.