A Low-Frequency Broadband Electromagnetic-Piezoelectric-Frictional Hybrid Vibration Energy Harvester

A vibration energy harvesting and composite technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electric components, etc., can solve the problem of difficult collection of low-frequency vibration energy, limited energy conversion efficiency, Narrow working bandwidth and other issues, to achieve the effect of enriching power output characteristics, strong environmental adaptability, and reducing collision energy consumption

Active Publication Date: 2022-02-25
HENAN UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0003] At present, vibration energy harvesters generally have the problems of low resonance frequency and narrow working bandwidth. It is difficult to efficiently collect low-frequency and random environmental vibration energy, and most of them have internal friction and collision energy consumption, which limits the improvement of energy conversion efficiency.

Method used

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  • A Low-Frequency Broadband Electromagnetic-Piezoelectric-Frictional Hybrid Vibration Energy Harvester
  • A Low-Frequency Broadband Electromagnetic-Piezoelectric-Frictional Hybrid Vibration Energy Harvester
  • A Low-Frequency Broadband Electromagnetic-Piezoelectric-Frictional Hybrid Vibration Energy Harvester

Examples

Experimental program
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Embodiment 1

[0023] Such as Figure 1-Figure 4 As shown, a low-frequency broadband electromagnetic-piezoelectric-friction composite vibration energy harvester includes a housing 1, the upper and lower ends of the housing 1 are respectively fixed with end caps 7, and the inner surfaces of the two end caps 7 are fixed A fixed magnet 6 is installed, a moving magnet mechanism 2 is installed in the middle part of the housing 1, and an induction coil 5 is installed at the moving magnet mechanism 2 on the outer peripheral wall of the casing 1, between the moving magnet mechanism 2 and the fixed magnet 6 on the upper side An elastic limit mechanism 3 and a friction generating mechanism 4 are provided in sequence, and an elastic limit mechanism 3 and a friction generating mechanism 4 are also arranged in sequence between the moving magnet mechanism 2 and the fixed magnet 6 on the lower side. The moving magnet mechanism 2 and the elastic There is a gap between the limiting mechanisms 3, the central ...

Embodiment 2

[0035] Such as Figure 1-Figure 4 As shown, a low-frequency broadband electromagnetic-piezoelectric-friction compound vibration energy harvester includes a housing 1, the upper and lower ends of the housing 1 are respectively fixed with end caps 7, and the inner end faces of the two end caps 7 are all fixed A fixed magnet 6 is installed, a moving magnet mechanism 2 is installed in the middle part of the housing 1, and an induction coil 5 is installed at the moving magnet mechanism 2 on the outer peripheral wall of the casing 1, between the moving magnet mechanism 2 and the fixed magnet 6 on the upper side An elastic limit mechanism 3 and a friction generating mechanism 4 are provided in sequence, and an elastic limit mechanism 3 and a friction generating mechanism 4 are also arranged in sequence between the moving magnet mechanism 2 and the fixed magnet 6 on the lower side. The moving magnet mechanism 2 and the elastic There is a gap between the limiting mechanisms 3, the cent...

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Abstract

The invention relates to a low-frequency broadband electromagnetic-piezoelectric-friction compound vibration energy collector, which includes a housing, the upper and lower ends of the housing are respectively fixed with end covers, and the inner surfaces of the two end covers are fixedly installed with A fixed magnet, a moving magnet mechanism is installed in the middle of the housing, an induction coil is installed on the outer peripheral wall of the housing at the moving magnet mechanism, and an elastic limit mechanism and a friction generating mechanism are respectively arranged between the moving magnet mechanism and the fixed magnets on both sides. electric mechanism. The invention utilizes a multi-stable vibration system and a dual-degree-of-freedom vibration system to enable the vibration energy harvester to respond to low-frequency vibrations in a wide range, and at the same time utilizes the piezoelectric effect and frictional electricity generation effect to collect collision energy, reducing collision consumption energy, so that the vibration energy harvester has the advantages of low-frequency broadband response capability and high-efficiency energy harvesting at the same time.

Description

technical field [0001] The invention relates to the technical field of energy collection, in particular to a low-frequency broadband electromagnetic-piezoelectric-friction compound vibration energy collector. Background technique [0002] With the wide application of wireless sensor network technology, the chemical battery as the main power supply method has the problems of short life and limited energy storage. The means are not suitable for workplaces where secondary entry is difficult, locations are scattered, and the working environment is harsh. As a green energy harvesting technology, the vibration energy harvester can convert the vibration energy widely present in the surrounding environment into electrical energy, for example, the vibration of bridges, the vibration formed by driving vehicles, and the vibration generated by human activities. Vibration in the environment exists in every corner of nature at all times, and is not affected by weather, season and tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K35/02H02K5/04H02N2/18H02N1/04
CPCH02K35/02H02K5/04H02N2/186H02N1/04
Inventor 张坤冯伟刘保国康克家常永程敏
Owner HENAN UNIVERSITY OF TECHNOLOGY
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