This paper presents modeling and simulation of a cantilever-type piezoelectric energy harvester based on a combined FEM (Finite Element Method) and spice circuit. The PEH having dimension of 61 mm × 37 mm × 0.4 mm provides the maximum output power of 8 mW at resonant frequency of 127 Hz. The fabricated cantilever-type PEH (Piezoelectric Energy Harvester) has been characterized with variable resistor, which reveals that maximum power transfer is achieved at 10 kΩ. The modeling and simulation have beenperformed to study the effect of piezoelectric layer thickness on PEH output power in case of load resistance. FEM modeling and simulations have been carried out to extract electrical elements such as Rm, Lm, Cm, Cp and Γ. Those electrical elements have been included into a spice model to find optimal load resistance for maximum power transfer as well as. frequency response as function of piezoelectric layer thickness. Experiment and simulation show a good agreement on optimal load resistance.

本文介绍了基于组合 FEM（有限元方法）和 spice 电路的悬臂式压电能量采集器的建模和仿真。尺寸为 61 mm × 37 mm × 0.4 mm 的 PEH 在 127 Hz 的谐振频率下提供 8 mW 的最大输出功率。制造的悬臂式 PEH（压电能量收集器）具有可变电阻器的特征，这表明在 10 kΩ 时可实现最大功率传输。通过建模和仿真研究了负载电阻情况下压电层厚度对PEH输出功率的影响。已经进行了 FEM 建模和仿真，以提取诸如 Rm、Lm、Cm、Cp 和 Γ 等电气元素。这些电气元件已包含在 spice 模型中，以找到最大功率传输的最佳负载电阻以及。频率响应作为压电层厚度的函数。实验和仿真表明最佳负载电阻有很好的一致性。