压电阵列双相能量收集器的有限元分析模型

文中基于压电阵列双相能量收集器的压电效应和磁–力–电耦合效应，提出了一种宽频的能量收集结构。该结构可同时俘获环境中广泛存在的机械振动和磁场能量，从而实现低功耗电子设备的自供电。利用有限元软件COMSOL建立了压电阵列双相能量收集器的几何模型并进行数值仿真，分析了不同载荷以及组份材料参数对俘能器性能的影响。研究结果表明，压电阵列双相能量收集器能同时有效地收集机械振动和磁场能量，且各单元串联时可提高输出电压幅值、拓宽共振频带。通过调节材料参数，可以灵活调节俘能器的谐振频率，从而获得最佳电能输出。文中的仿真结果为高性能俘能器的设计提供了一定的理论指导。

Finite Element Analytical Model of Piezoelectric Array Dual-phase Energy Harvester

This paper presents a broadband energy harvesting structure based on the piezoelectric effect and the magneto-elastic-electric coupling effect of piezoelectric array dual-phase energy harvester, which can be used to simultaneously capture mechanical and magnetic energy distributed extensively in the environment, so as to realize the self-powering for low-power electric devices. The geometric model of the energy harvester is established and the numerical simulation is carried out by using the finite element software COMSOL, and the influences of different loadings as well as component material parameters on the energy harvester are analyzed. It is demonstrated that the piezoelectric array dual-phase energy harvester can simultaneously and effectively harvest both mechanical energy and magnetic energy. The amplitude of output voltage is enhanced, and a wider resonance bandwidth is achieved when the collecting piezoelectric units are connected in series. The resonance frequency of the harvester can be tuned flexibly by altering the component material parameters. Consequently, the optimal output power can be obtained. The simulation results of this paper provide a theoretical guidance for designing high-performance energy harvesters