压电发电装置的功率分析与试验  

Power analysis and test of piezoelectric generator

作　　者：唐可洪[1] 阚君武[1] 任玉[2] 王淑云[2] 朱国仁[1] 邵承会[1] 

机构地区：[1]吉林大学机械科学与工程学院,长春130022 [2]吉林大学数学学院,长春130012

出　　处：《吉林大学学报（工学版）》2009年第6期1550-1553,共4页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50775093);吉林省科技发展计划项目(20050316-2;20070331)

摘　　要：为提高压电发电装置(能量转换系统)的输出功率,建立了简谐激励条件下两种能量转换电路(交、直流输出)功率计算模型,并进行了模拟分析及试验验证。理论研究结果表明,在压电振子开路电压(结构尺寸及激励频率)一定时,存在不同的最佳负载使交、直流输出电路获得最大的输出功率,交流输出的最佳负载及最大功率分别是直流输出最佳负载及最大功率的2/π和π/2倍。试验用压电振子尺寸为58mm×30mm×0.7mm,激励频率为44.3Hz时的开路电压为14.8V。交、直流输出电路所对应的最佳理论/试验负载分别为72/71kΩ和113/110kΩ,最大理论/试验功率分别为0.76/87mW和0.49/4.7mW。In order to enhance the output power of a piezoelectric generator（energy conversion system）,power calculation models were established for the AC-and DC-output circuits and their simulation analysis and test validation were performed.The analysis results showed that there were different optimal load resistances for the two output circuits to obtain maximal output power under a given open voltage of piezoelectric oscillator,which depends on its size and librating frequency.The optimal load and maximal power of the AC-output-circuit are 2/π and π/2 times those of the DC-output-circuit,respectively.The open voltage of the tested piezoelectric oscillator（58 mm×30 mm×0.7 mm） is 14.8 V at vibrating frequency of 44.3 Hz.Accordingly,the optimal analytical/tested load resistance of the AC-and DC-circuits are 72/71 kΩ and 113/110 kΩ,and the maximal analytical/tested power are 0.76/87 mW and 0.49/4.7 mW,respectively.

关 键 词：仪器仪表技术 压电 压电发电装置 输出功率 能量转换 

分 类 号：TN836[电子电信—信息与通信工程]