一种风力驱动的新型宽频带旋转式压电发电机设计与性能测试分析  

Design and performance analysis of a novel wide-bandwidth rotary piezoelectric generator driven by wind

作　　者：纪潇[1,2] 褚金奎[1,2] 韩冰峰[1,2] 

机构地区：[1]大连理工大学精密与特种加工教育部重点实验室,辽宁大连116023 [2]辽宁省微纳米技术及系统重点实验室,辽宁大连116023

出　　处：《可再生能源》2016年第4期524-529,共6页Renewable Energy Resources

基　　金：国家自然基金资助项目(51175056;51305157)

摘　　要：近年来旋转式压电发电装置广泛地应用于风能发电领域。为解决旋转式压电发电机工作频带宽较窄的问题,提出一种利用缓冲块增大工作频带宽的风力驱动的新型旋转式压电发电机结构,建立其理论模型并搭建了单悬臂梁测试实验平台。通过对比有无缓冲块时压电悬臂梁输出性能,研究了缓冲块的位置参数对压电发电机输出性能的影响规律。实验结果表明,加入缓冲块能增大压电发电机的工作频带宽,工作频带宽可由无缓冲时的3.23～3.83 r/s增大至1.75～7.80 r/s,且缓冲块与悬臂梁的纵向间距越小频带越宽;最佳匹配电阻可由无缓冲时的350 kΩ减小至1 kΩ。在缓冲块与悬臂梁的横向间距为7 mm、纵向间距为0.8～1.2 mm时发电机的工作频带宽和输出功率较大,为宽频带旋转式压电发电机的设计提供了重要的依据。Recently, the rotary piezoelectric device is widely used in the wind power generation. In order to improve the working bandwidth of the rotary piezoelectric generator, a novel rotary piezoelectric generator utilizing a bump stop to broaden the working bandwidth is presented. A theoretical model of the generator is established and the experiment platform for testing the performance of a single piezoelectric cantilever is built. By comparing the output performances of the cantilever with and without a bump stop, the influence of the different bump positions on the output performance of the generator is studied. The results indicated that the bump stop could broaden the working bandwidth, which increased from 3.23～3.83 r/s to 1.75～7.80 r/s with the stop used, and as the vertical distance between the stop and the piezoelectric cantilever decreased, the working bandwidth increased; Additionally, with the stop used, the optimal matched resistance decreased from 350 kΩ to1 kΩ. When the vertical and the horizontal distances are 7 mm and 0.8～1.2 mm respectively, the output power and the working bandwidth are larger, which provided an important reference for the design of the wide bandwidth rotary piezoelectric generator.

关 键 词：风能 压电发电机 旋转式发电机 工作频带宽 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程] TK83