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Combined piezoelectric generating system

A piezoelectric power generation and combined technology, which is applied in the direction of battery circuit devices, generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, etc., can solve the problem that PZT ceramics are fragile and PZT piezoelectric sheets cannot Withstand large strain and other problems, achieve a breakthrough in power generation efficiency, not easy to collect, and improve the utilization rate

Inactive Publication Date: 2014-04-02
WUHAN UNIV OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Although PZT piezoelectric materials are the most widely used, PZT ceramics are fragile, which makes PZT piezoelectric sheets unable to withstand large strains in piezoelectric energy harvesting systems.

Method used

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  • Combined piezoelectric generating system
  • Combined piezoelectric generating system

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the content of the present invention is not limited.

[0036] The combined piezoelectric system provided by the present invention refers to a power generating device that combines the positive piezoelectric effect of piezoelectric ceramics and the electromagnetic induction effect of magnetoelectricity. The stepping pressure generated when a person walks acts on the upper end surface of the upper shell, resulting in a downward displacement, so that the coil wound on the inner wall of the upper shell cuts the magnetic induction line generated by the magnet embedded in the lower shell wall, thereby generating a current. At the same time, when it is pressed down to a certain height, it acts on the wedge-shaped gasket in front of the piezoelectric stack, and the piezoelectric part begins to act to generate charges, which are exported through the wires and t...

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Abstract

The invention relates to a generating system for improving the space utilization ratio by combining piezoelectricity and magnetoelectricity. The system consists of a generating device and an adjusting charging circuit, wherein the generating device comprises a piezoelectric part and a magnetoelectric part; when an upper shell (10) moves upwards and downwards, a piezoelectric sheet is extruded periodically to generate charges; meanwhile, coils wound on the inner wall of the upper shell are driven to move in order to cut a magnetic induction line to generate charges when the upper shell moves; in the adjusting circuit, the charges generated by piezoelectricity and the charges generated by electromagnetic induction are collected and combined, so that the output quantity of the device is increased; a novel force transmission structure is adopted in the piezoelectric part, so that the unit stress of the piezoelectric sheet is increased, and the generating quantity is increased; meanwhile, a magnetoelectric device is matched, so that the generating quantity is further increased. By adopting the generating system, the problem of small piezoelectric generating is solved; by combining the magnetoelectricity, the generating quantity and the generating efficiency are increased effectively; the generating system has the advantages of simple structure, large generating quantity, environmental friendliness and the like.

Description

technical field [0001] The invention relates to a power generation and charging device, in particular to a device in which the combination of pressure power generation and magnetoelectric power generation is applied to battery charging or external power supply. Background technique [0002] Due to the improvement of the performance of piezoelectric materials, new materials such as PVDF and piezoelectric optical fiber have improved the flexibility and piezoelectric conversion efficiency of piezoelectric materials. At the same time, we have also seen the research results of foreign counterparts in the direction of positive piezoelectricity. Domestic scholars have also begun to study the positive piezoelectric effect. [0003] Now experts and scholars at home and abroad have made research on improving energy conversion efficiency from piezoelectric materials, the structure of piezoelectric vibrators, and energy harvesting circuits. [0004] Research on piezoelectric materials....

Claims

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Application Information

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IPC IPC(8): H02N2/18H02K35/04H02J7/32
Inventor 杨琨王亚男张琦李延伟
Owner WUHAN UNIV OF TECH
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