【摘要】 针对当前井下设备状态监测传感器的自供电需求，设计了一种面向旋转结构的激励式星形压电俘能器，利用旋转结构的运动特性，结合磁体构建激励源进行旋转能量转换。通过COMSOL仿真软件对星形压电梁及激励结构进行有限元分析，探究其发电性能差异。搭建实验平台，测试俘能器各项参数对输出电压的影响，并进行最优负载匹配。仿真及实验结果表明：激励式结构可以有效地转换旋转能量，星形梁结构的输出响应更高；当基板厚度为1 mm、附加质量块为4 g、在并联标准电路下外接最优负载10 kΩ时，俘能器最大转换功率达2.82 mW。更多还原

【Abstract】 In response to the demand for self-powering of underground equipment condition monitoring sensors, an excitated star piezoelectric energy harvester for rotating structure was designed, which utilized the motion characteristics of rotating structure and combines magnet to construct excitation source for rotating energy conversion. The finite element analysis of the parameters of the star piezoelectric beam was carried out by COMSOL software to investigate the difference of the power generation performance, and an experimental platform was built to test the influence of various parameters of the energy harvester on the output voltage, and the optimal load matching was carried out. The simulation and experimental results show that the excitation structure can effectively convert rotational energy, and the output response of the star beam structure is higher. When the thickness of the substrate is 1 mm, the additional mass block is 4 g, and the external optimal load is 10 kΩ under the parallel standard circuit, the maximum conversion power of the harvester reaches 2.82 mW.更多还原