In this work, we report a magneto-mechano-electric (MME) energy harvester with a rectangular cymbal structure consisting of a piezoelectric ceramic plate and magnetostrictive alloy (Metglass) foils. The magnetic field induced voltage was then predicted by using finite element analysis. Experimental results show that under a magnetic field excitation of 8 Oe at 180 Hz (resonance frequency), the MME energy harvester can generate a peak-peak output power of 5.7 mW and peak-peak current of 2.3 mA, respectively, for a load resistance of 5.6 kΩ, which allow to drive 10 LEDs lighting directly and stably. Correspondingly, its power density is 5.1 mW cm⁻³ at H_ac =7 Oe, which is comparable with previous reports about traditional cantilever structure MME energy harvester using a piezoelectric single crystal. This work confirms that the MME energy harvester is a promising candidate for powering wireless sensors and other micro-energy smart electronics using the stray magnetic field, or even mechanical vibration energy in environment.

在这项工作中，我们报告了一种具有矩形c结构的磁－机电（MME）能量收集器，该结构由压电陶瓷板和磁致伸缩合金（Metglass）箔组成。然后，通过使用有限元分析来预测磁场感应电压。实验结果表明，在180 Hz（共振频率）的8 Oe磁场激励下，MME能量采集器可分别产生5.7 mW的峰峰值输出功率和2.3 mA的峰峰值电流，以实现负载电阻5.6kΩ的电阻，可以直接稳定驱动10个LED。相应地，其在H _ac时的功率密度为5.1 mW cm ^-3= 7 Oe，与以前有关使用压电单晶的传统悬臂结构MME能量采集器的报道相当。这项工作证实了MME能量收集器是使用杂散磁场甚至环境中的机械振动能量为无线传感器和其他微能量智能电子设备供电的有前途的候选者。