Han Bing, Zhang Shubin, Liu Jianbin, Jiang Yanfeng
Department of Electronic Engineering, Jiangnan University, Wuxi 214122, China.
Institute of Advanced Technology, Jiangnan University, Wuxi 214122, China.
Micromachines (Basel). 2022 May 10;13(5):752. doi: 10.3390/mi13050752.
Energy harvesting technology is regarded as a feasible solution for the continuous power supply of microelectronic devices. Efforts have been made to improve the output power of all kinds of energy harvesting devices. This paper reports a 2 × 2 array piezoelectric-electromagnetic hybrid energy harvester that achieves high power output through the combination of piezoelectric and electromagnetic conversion. The harvester included four piezoelectric-electromagnetic hybrid modules, each of which consisted of a piezoelectric sheet, a permanent magnet and a wound coil. The permanent magnet, also serving as the mass block of the cantilever beam when subjected to external stimulus, contributed to a large displacement of the vibration and generated high output power. At an acceleration of 1 g and a resonance frequency of 70.4 Hz, the measured maximum output power of the hybrid energy harvester was 66.08 mW, of which the piezoelectric and electromagnetic portions were 56.96 and 9.12 mW, respectively. Furthermore, in a charging experiment, a capacitor of 23.5 mF was charged to 11.5 V within 20 s, which demonstrates a practical application of the hybrid energy harvester for microelectronic devices.
能量收集技术被视为微电子设备持续供电的一种可行解决方案。人们已努力提高各类能量收集装置的输出功率。本文报道了一种2×2阵列的压电 - 电磁混合能量收集器，该收集器通过压电和电磁转换的结合实现了高功率输出。该收集器包括四个压电 - 电磁混合模块，每个模块由一个压电片、一块永磁体和一个绕线线圈组成。永磁体在受到外部刺激时还充当悬臂梁的质量块，有助于产生较大的振动位移并产生高输出功率。在1 g加速度和70.4 Hz共振频率下，测得的混合能量收集器的最大输出功率为66.08 mW，其中压电部分和电磁部分分别为56.96 mW和9.12 mW。此外，在充电实验中，一个23.5 mF的电容器在20 s内被充电至11.5 V，这证明了该混合能量收集器在微电子设备中的实际应用。
