Performing Magnetic Boundary Modulation to Broaden the Operational Wind Speed Range of a Piezoelectric Cantilever-Type Wind Energy Harvester

被引:0
作者
Liu, Feng-Rui [1 ]
Zhao, Lin-Chuan [2 ]
Yan, Ge [2 ]
Zhang, Wen-Ming [2 ]
Wu, Zhi-Yuan [2 ]
Zhang, Xiao-Long [1 ]
机构
[1] Shanghai Aerosp Control Technol Inst, Shanghai Key Lab Aerosp Intelligent Control Techno, Shanghai 201109, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Mech Engn, State Key Lab Mech Syst & Vibrat, Shanghai 200240, Peoples R China
基金
中国国家自然科学基金;
关键词
energy harvesting; wind; stepped beam; magnetic boundary; modulation; VORTEX-INDUCED VIBRATIONS; WIRELESS SENSOR NETWORKS; DESIGN;
D O I
10.3390/mi15111286
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Small piezoelectric wind-induced vibration energy harvesting systems have been widely studied to provide long-term sustainable green energy for a large number of wireless sensor network nodes. Piezoelectric materials are commonly utilized as transducers because of their ability to produce high output power density and their simple structure, but they are prone to material fracture under large deformation conditions. This paper proposes a magnetic boundary modulated stepped beam wind energy harvesting system. On the one hand, the design incorporates a composite stepped beam with both high- and low-stiffness components, allowing for efficient vibration and electrical energy output at low wind speeds. On the other hand, a magnetic boundary constraint mechanism is constructed to prevent the piezoelectric sheet from breaking due to excessive deformation. Experiments have confirmed that the effective operational wind speed range of the harvester with magnetic boundary constraints is doubled compared to that of the harvester without magnetic boundary constraints. Furthermore, by adjusting the magnetic pole spacing of the boundary, the harvesting system can generate sufficiently high output power under high-wind-speed conditions without damaging the piezoelectric sheet.
引用
收藏
页数:14
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