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A two-degree-of-freedom piezoelectric-electromagnetic hybrid energy harvester

An energy harvester and hybrid technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., which can solve the problem of low output power and inability to efficiently collect low-frequency vibration energy, etc. problem, to achieve the effect of large output power, simple structure and easy implementation

Active Publication Date: 2019-05-07
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a two-degree-of-freedom piezoelectric-electromagnetic hybrid energy harvester with simple and compact structure, low cost of use, and a wide range of applications, so as to overcome the existing piezoelectric, electromagnetic The output power of piezoelectric and electromagnetic hybrid energy harvesters is low, and they cannot efficiently collect low-frequency vibration energy.

Method used

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  • A two-degree-of-freedom piezoelectric-electromagnetic hybrid energy harvester
  • A two-degree-of-freedom piezoelectric-electromagnetic hybrid energy harvester
  • A two-degree-of-freedom piezoelectric-electromagnetic hybrid energy harvester

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Experimental program
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Effect test

Embodiment 1

[0030] see figure 1, the present invention provides a two-degree-of-freedom piezoelectric-electromagnetic hybrid energy harvester, which at least includes a U-shaped cantilever beam 1, a magnet 2, a detachable clamp 3, a frame 6, a coil 7, a cylinder 8, and a fixed clamp 11 , spring 12; The magnet 2 includes a first magnet 2-1 and a second magnet 2-2; The frame 6 includes a bottom plate 6-1 and a vertical wall 6-2 that are firmly connected together; The U-shaped The cantilever beam 1 is composed of a first piezoelectric cantilever beam 1-1 and a second piezoelectric cantilever beam 1-2. The open end of the U-shaped cantilever beam 1 is fixedly connected to the vertical wall 6-2 of the frame 6. The piezoelectric cantilever beam 1-1 and the second piezoelectric cantilever beam 1-2 are parallel in the horizontal plane, and the free end of the U-shaped cantilever beam 1 is fixedly connected to the first magnet 2-1 through a detachable clamp 3. A magnet 2-1 is located between the ...

Embodiment 2

[0032] On the basis of Embodiment 1, the open end of the U-shaped cantilever beam 1 is fixedly connected to the vertical wall 6 - 2 of the frame 6 through the cover plate 9 and the screw 10 .

[0033] like figure 2 As shown, the first piezoelectric cantilever 1-1 includes a first piezoelectric element 1-1-1 and a first rectangular piezoelectric metal beam 1-1-2; the second piezoelectric cantilever 1- 2 includes a second piezoelectric element 1-2-1 and a second rectangular piezoelectric metal beam 1-2-2; the first piezoelectric element 1-1-1 is fixed to the first rectangular piezoelectric On the metal beam 1-1-2, the second piezoelectric element 1-2-1 is fixed on the second rectangular piezoelectric metal beam 1-2-2 through conductive glue; the first piezoelectric element 1-1 -1 is polarized along the thickness direction of the first rectangular piezoelectric metal beam 1-1-2, and the electrodes of the first piezoelectric element 1-1-1 are connected in series or in parallel; ...

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Abstract

The invention belongs to the technical field of renewable energy and miniature power generation, and particularly relates to a two-degree-of-freedom piezoelectric electromagnetic hybrid energy harvester. The energy harvester at least comprises a U-shaped cantilever beam, magnets, a detachable fixture, a frame, a coil, a cylinder, a fixed fixture and a spring; the U-shaped cantilever beam is composed of a first piezoelectric cantilever beam and a second piezoelectric cantilever beam, the opening end of the U-shaped cantilever beam is fixedly connected with the vertical wall of the frame, and the free end of the U-shaped cantilever beam is fixedly connected with the first magnet; a piezoelectric energy harvester body is formed by the U-shaped cantilever beam, the detachable fixture and the first magnet; the coil is formed by winding enameled wires along the right half part of the outer wall of the cylinder; the cylinder is fixedly connected with the vertical wall of the frame; the fixedfixture is used for clamping the second magnet; the homopolar parts of the second magnet and the first magnet are opposite to each other; an electromagnetic energy harvester body is formed by the fixed fixture, the second magnet, the spring and the coil. The two-degree-of-freedom piezoelectric electromagnetic hybrid energy harvester has the advantages of being simple and compact in structure, highin energy collection efficiency and low in use cost.

Description

technical field [0001] The invention belongs to the technical field of renewable energy and micro power generation, and in particular relates to a hybrid energy harvester based on piezoelectric effect and electromagnetic induction effect, which is suitable for micro sensors, micro actuators, wearable electronic devices, etc. A low-power device that captures energy for energy supplementation. Background technique [0002] The continuous advancement of technologies such as microelectronics, micromechanics, and micromanufacturing has promoted the continuous emergence of various low-power devices such as microsensors, microactuators, microsignal transmitters, and wearable electronic devices. The power consumption of these devices is small, typically in the milliwatt range. Currently, these low-power devices are powered primarily by electrochemical batteries. The battery has limited energy storage and short service life, and needs to be charged or replaced regularly, which brin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18
CPCH02N2/188
Inventor 樊康旗任获荣朱应敏王卫东张大兴
Owner XIDIAN UNIV
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