A piezoelectric-electromagnetic coupling energy harvesting device and method based on wind-induced vibration
A technology of energy harvesting and electromagnetic coupling, which is applied in the direction of electromechanical devices, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the problems of not wide working wind speed range and low wind-induced vibration frequency, etc., to achieve Improve energy collection efficiency, facilitate popularization, and improve the effect of vibration frequency
Active Publication Date: 2021-09-07
HANGZHOU DIANZI UNIV
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Problems solved by technology
[0004] The present invention aims at the technical problems of the existing wind-induced vibration energy harvester that the wind-induced vibration frequency is not high and the working wind speed range is not wide, and provides a piezoelectric-electromagnetic coupling energy harvesting device and method based on wind-induced vibration
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[0032] The present invention will be further described in detail below with reference to the drawings and embodiments.
[0033] Such as Figure 1~5As shown, a wind-induced vibration-based piezoelectric-electromagnetic coupling energy harvesting device includes a first moving structure 18 , a second moving structure 19 , a flexible fan blade 1 and a clip body 13 . The first moving structure 18 includes a cantilever beam 11 and a piezoelectric ceramic 10; both sides of the cantilever beam 11 are fixed with the piezoelectric ceramic 10; one end of the cantilever beam 11 is provided with a via hole, and the other end is fixed on the clamp by the second fastener 12 Specifically on 13; the flexible fan blade 1 is fixed at one end of the cantilever beam 11 through the hole through the first fastener 9, and the flexible fan blade 1 is coaxially arranged with the through hole; the flexible fan blade 1 is provided with at least three blades; the second The second motion structure 19 in...
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The invention discloses a piezoelectric-electromagnetic coupling energy collection device and method based on wind-induced vibration. The wind-induced vibration frequency of the existing wind-induced vibration energy harvester is not high, and the working wind speed range is not wide. Both sides of the cantilever beam of the present invention are fixed with piezoelectric ceramics; the flexible fan blade is fixed at the end of the cantilever beam; the middle position of the hollow tube is fixed with the end of the cantilever beam; Placed in a hollow tube; the cylindrical hole of the frequency modulation boss is equipped with a permanent magnet, and the side of the frequency modulation boss is provided with several frequency modulation slots connected with the cylindrical hole; a rectangular frequency modulation board is inserted in one of the frequency modulation slots; two permanent magnets attract each other The hollow tube is provided with a suspension magnet; the suspension magnet and the permanent magnet repel each other; the outer wall of the hollow tube is fixed with a multi-turn induction coil. The flexible fan blade of the present invention can produce vibration responses to multi-directional wind forces, increase the potential difference generated by piezoelectric ceramics, and increase the vibration frequency of the suspension magnet, thereby improving energy collection efficiency.
Description
technical field [0001] The invention relates to the technical field of vibration energy collection, in particular to a piezoelectric-electromagnetic coupling energy collection device and method based on wind-induced vibration. Background technique [0002] There are a lot of collectable energy in our life, such as wind energy, solar energy, mechanical vibration energy, etc. Among them, wind energy is a kind of clean energy and can be seen everywhere. It has the characteristics of convenient collection and high energy density. When the wind encounters the structure during the flow, under the action of fluid-solid coupling, the wind energy is converted into the mechanical vibration energy of the structure, and then this vibration energy is converted into electrical energy through a certain energy conversion method. This kind of vibration caused by the wind force is called wind-induced vibration, which can be converted into electrical energy through a certain energy conversion ...
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IPC IPC(8): H02N2/18H02K35/02
CPCH02K35/02H02N2/185H02N2/186
Inventor 周茂瑛黄世帆孟爱华王班代裴飞魏德华
Owner HANGZHOU DIANZI UNIV
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