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一种新型振动发电装置及其建模与实验研究

, PP. 113-118

Keywords: 振动发电装置,电动势,磁弹簧,永磁体

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Abstract:

提出了一种新型的振动发电装置,该装置采用两端固定环形永磁体构成磁弹簧,运动永磁体的内侧和外侧分别缠绕线圈。建立了轴向磁化环形永磁体的输入输出数学模型,利用该模型,得出了电磁力随运动永磁体偏移的特性曲线。采用有限元法分析了发电装置的三维磁场分布和内外侧线圈的输出电压波形;数值仿真得到的电磁力特性曲线与数学模型计算结果一致;利用特性曲线计算出了磁弹簧的固有频率。发电装置输出电压波形的实验测试结果和仿真结果一致;磁弹簧固有频率的测试结果与计算值相吻合。该振动发电装置在振动频率为20Hz,振幅为5mm时,最大输出功率为28.3mW,开路电压的有效值为5.1V。

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