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Composite energy harvester

An energy harvester and composite technology, applied in the field of energy harvesters

Inactive Publication Date: 2017-06-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no in-depth research on the vibration energy loss of automobile engines in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The composite energy harvester provided in this embodiment has a structure such as Figure 1-Figure 3 As shown, it includes a cantilever beam 1, a central mass structure 2, a permanent magnet base 3, and a ring 5, wherein: the cantilever beam 1 has many roots, which are evenly distributed, and its outer end is connected to the inner surface of the ring 5 by welding, Its inner end is welded to the side of the center mass 2, thereby forming an integrated structure, similar to the shape of a wheel. The permanent magnet base 3 is welded with the circular ring 5 through a plurality of upright poles 4 (4 are provided in this embodiment). The individual components of the energy harvester are designed as symmetrical structures, and the structures of the cantilever beam 1 and the central mass block 2 are mirror-symmetrical about the permanent magnet base 3 .

[0034] This kind of composite energy harvester is a piezoelectric, magnetoelectric, and magnetostrictive integrated str...

Embodiment 2

[0036] Such as figure 1 with figure 2Shown: In order to improve the efficiency of piezoelectric power generation, a plurality of cantilever beams 1 with equal length and width and identical physical properties are designed, and the cantilever beams 1 are directly connected to the central mass 2. At the same time, the surface of each cantilever beam 1 is heterogeneously integrated with a magnetostrictive-piezoelectric composite material layer, so that the piezoelectric power generation and the magnetostrictive power generation are combined to complete the composite energy output connection.

[0037] The surface of the cantilever beam 1 is heterogeneously integrated with a magnetostrictive-piezoelectric composite material layer, specifically PZT ceramic material and Terfenol-D. Compared with other piezoelectric materials, PZT ceramic material has a high electromechanical coupling coefficient and a dielectric constant range Very wide, low loss and other advantages. Moreover, i...

Embodiment 3

[0040] Because this energy harvester needs to use the magnetostrictive-piezoelectric composite material layer carrier integrated on the cantilever beam 1 for resonant piezoelectric power generation, it is necessary to select the optimal PZT piezoelectric film material to maximize the efficiency. generate electricity. PZT-5H is a high-voltage, high-dielectric material with a moderate dielectric constant, which will not cause overheating due to high drive, and has a large output power, which meets the requirements of this experimental material.

[0041] This kind of composite energy harvester is a piezoelectric, magnetoelectric, and magnetostrictive integrated structure, which is used to supply power to vehicle equipment.

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Abstract

The invention a composite energy harvester, which comprises cantilever beams (1), center mass block structures (2), a permanent magnet base (3) and circular rings (5). The plurality of cantilever beams (1) are distributed uniformly, the outer ends of the cantilever beams are welded to the inner surface of the corresponding circular ring (5), and the inner ends of the cantilever beams (1) are welded to the side portion of the corresponding center mass block (2) to form an integrated structure; and the permanent magnet base (3) is connected with the circular rings (5) through a plurality of vertical rods. A single component of the energy harvester is designed to be in a symmetrical structure, and the integrated structures are in mirror symmetry with respect to the permanent magnet base (3). Piezoelectric, magnetoelectric and magnetostrictive power generating modes are combined organically, and thus energy and space are utilized fully; by optimizing a device structure, more vibration energy within a certain range can be captured, and power generating efficiency is improved; and through interchangeability of devices in frequency-similar work environment, utilizability of the energy harvester is improved, and electric energy produced thereby is used for providing power for on-board equipment.

Description

technical field [0001] The invention relates to an energy harvester, specifically a novel energy harvester integrating three power generation modes of piezoelectricity, magnetoelectricity and magnetostriction. Background technique [0002] With people's attention to environmental issues and desire for new energy sources, new environmentally friendly energy harvesting technology has become a hot spot for researchers at home and abroad; at the same time, with the continuous deepening of research on the integration of semiconductor components, vibration mechanical energy through harvesting technology It becomes possible to convert into electrical energy and power MEMS. In recent years, more and more researchers are committed to the research work of using environmental vibration energy to generate electricity, and producing corresponding products to put into real life. For example, the self-generating insole designed and invented by John Kymissis of the Massachusetts Institute ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18H02K35/04
CPCH02N2/18H02K35/04
Inventor 杨琨郭晓宇吴思超乞兆诚梁钰赵晓兴李彦甫朱子谦
Owner WUHAN UNIV OF TECH