Analysis of Magnetic Plucking Configurations for Frequency Up-Converting Harvesters
Analysis of Magnetic Plucking Configurations for Frequency Up-Converting Harvesters
复制标题
上变频采摘机磁力采摘结构分析
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
S. Roundy
中科院分区：
文献类型：
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作者：
T. Xue;S. Roundy
当能量源（例如，人体运动）仅提供具有非常低和不规则频率的激励时，磁拾取在惯性能量收集中应用频率上转换的策略。基于三维解析立方体永磁体模型，分析了三种不同的永磁体结构：直接排斥结构、正交结构和间接排斥结构实现磁拔出。仿真和实验结果表明，在设计可穿戴能量采集器时，在给定的实际约束条件下，间接排斥构型产生的尖端位移最大。我们已经在腕戴式旋转能量采集器中实现了这种配置，以采集多个压电梁。然而，其他配置在具有替代约束的应用中可能是有利的。
Magnetic plucking applies the strategy of frequency up-conversion in inertial energy harvesting when the energy source, such as human motion, only provides excitations with very low and irregular frequencies. This paper presents an analysis of three different magnet configurations to achieve magnetic plucking based on a three-dimensional analytical cube permanent magnet model: direct repulsive configuration, orthogonal configuration and indirect repulsive configuration. Simulation and experimental results indicate that the indirect repulsive configuration generates the largest tip displacement given the pratical constraints in designing a wearable energy harvester. We have implemented this configuration in a wrist-worn rotational energy harvester to pluck multiple piezoelectric beams. Other configurations, however, can potentially be advantageous in applications with alternative constraints.