基于非线性磁力的压电式旋转能量采集器  

Rotary Piezoelectric Energy Harvester Based on Nonlinear Magnetic Force

作　　者：孙航 王海[1,2] 史宁 杨春来 唐冶[3] SUN Hang;WANG Hai;SHI Ning;YANG Chunlai;TANG Ye(School of Mechanical and Automotive Engineering,Anhui Polytechnic University,Wuhu Anhui 241000,China;Anhui Key Laboratory of Advanced Numerical Control&Servo Technology,Wuhu Anhui 241000,China;School of Mechanical Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]安徽工程大学机械工程学院,安徽芜湖241000 [2]先进数控和伺服驱动安徽省重点实验室,安徽芜湖241000 [3]天津大学机械工程学院,天津300350

出　　处：《传感技术学报》2023年第9期1377-1384,共8页Chinese Journal of Sensors and Actuators

基　　金：安徽高校优秀青年骨干人才国外访学研修项目(gxgwfx2021035);安徽工程大学创新团队项目。

摘　　要：旋转机械能广泛存在于生产生活中,为了提高能量采集效率,解决现有旋转能量采集器结构复杂的问题,拟提出一种基于非线性磁力的压电式旋转能量采集器。首先推导了使用n组磁铁的能量采集器的非线性动力学方程。并基于MATLAB对其能量采集性能进行了数值仿真,最后通过实验对系统的输出特性进行验证。结果表明:随着外部激励幅值的增大,系统的响应幅值随之增大。当使用n组磁铁时,达到最大输出功率所需的转速与n成反比。在转速530 rpm时,开路输出电压达到43.6 V,输出功率达8 mW。使用单个磁铁对3.3μF电容充电,功率达到322.21μW,使用两个旋转磁铁时达到483.32μW。Rotating mechanical energy is widely existed in production process and life activities.A piezoelectric rotary energy harvester based on nonlinear magnetic force is proposed to accomplish high efficient energy harvest from the aforementioned rotation activity.The dynamic model of the harvester with nonlinear magnetic force is set up.The amplitude-frequency response characteristics of the harvester are simulated in MATLAB and verified by experiments.Simulation results show that the response amplitude of the harvester increases with the exterior excitation amplitude.The rotating speed of maximum output power of harvester reduces with the number of magnets sets of n.The experiments results verify the simulation conclusions.When the rotating speed is 530 rps,the maximum open circuit output voltage reaches 43.6 V and the output power reaches 8 W.when a single rotating magnet is used to charge a 3.3μF capacity,the charging power to the capacitor reaches 322.21μW,and when two rotating magnets are used,the charging power reaches 483.32μW.

关 键 词：能量采集 旋转能量采集 压电 非线性磁性力 

分 类 号：O322[理学—一般力学与力学基础] TN384[理学—力学]