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面向电力设备的T型梁电磁式振动能量采集器设计

238    2024-05-24

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作者:张明皓1, 宋睿1, 张鋆1, 周晨媛2, 王俊元2, 李运甲2

作者单位:1. 中国电力科学研究院有限公司,北京 100192;
2. 西安交通大学电气工程学院,陕西 西安 710049


关键词:传感器;能量采集;设备振动;电磁式;梁结构


摘要:

由于电网设备振动能量广泛存在,在监测设备运行状态的过程中,振动能量采集器将振动能量作为其监测装置电源的有效补充,可延长装置的运行时间。该文研究能量采集器基于刚柔结合结构,采用聚酰亚胺T型梁和FR4拾振平面线圈。刚柔结合结构使能量采集器件可基于标准工业工艺批量生产,T型梁设计可有效减少加工工艺的残余应力,柔性梁使其可在低环境振动下实现较高的振幅和能量采集效率。对于该采集器进行测试后,得出T型梁器件的固有频率为140 Hz,在±1g加速度下可输出电压9.40 mV,外接匹配电阻2.31 Ω后,输出功率为4.71 μW。因此,该器件的固有频率位于电力系统设备振动频率的频率区间内并提供一定的输出电压和功率,从而可以有效采集其电力设备的振动能量,并实现对于设备振动特征的监测。


Design of electromagnetic vibratory energy harvester with T-type beam for power grid equipment
ZHANG Minghao1, SONG Rui1, ZHANG Jun1, ZHOU Chenyuan2, WANG Junyuan2, LI Yunjia2
1. China Electric Power Research Institute, Beijing 100192, China;
2. Department of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Abstract: Due to vibration energy exists widely in power grid equipment, during the process of monitoring the operating state of the equipment, the vibratory energy harvester can convert vibration energy into the effective power supply of its monitoring device, which can extend the running time of the device. For the energy harvester studied in this paper, it is based on a rigid-flexible bonding structure, and the vibration picking part adopts a polyimide T-beam and an FR4 vibration plane coil. Among them, the rigid-flexible bonding structure enable the energy harvester to be mass-produced based on standard industrial processes, the T-type beam design can effectively reduce the residual stress of the processing process, and the flexible beam enables it to achieve high amplitude and energy harvesting efficiency at low ambient vibration. After testing the collector, the T-type beam device has a natural frequency of 140 Hz, an output voltage of 9.40 mV at ±1 g acceleration, and an output power of 4.71 μW with an external matching resistor of 2.31 Ω. Therefore, the natural frequency of the device is located in the frequency range of the vibration frequency of the power system equipment and provides a certain output voltage and power, so that the vibration energy of the power equipment can be effectively collected and the vibration characteristics of the equipment can be monitored.
Keywords: sensor;energy harvesting;equipment vibration;electromagnetic type;beam structure
2024, 50(5):114-121  收稿日期: 2021-10-23;收到修改稿日期: 2022-03-06
基金项目: 国家电网有限公司总部科技项目(5600-202055304A-0-0-00)
作者简介: 张明皓(1989-),男,北京市人,工程师,硕士,主要从事电力智能传感及设备在线监测技术研究。
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