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Miniature wind-power piezoelectric generator

A generator and wind power technology, applied in the field of energy development, can solve the problems of low power density, difficult miniaturization, and complex structure of wind-induced vibration micro-wind generators, and achieve the effects of improving electromechanical conversion efficiency, easy miniaturization, and small volume

Inactive Publication Date: 2012-11-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the current turbine micro-wind generators are that the structure is relatively complex, the volume is large, and it is difficult to miniaturize; while the power density of wind-induced vibration micro-wind generators is relatively low.

Method used

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  • Miniature wind-power piezoelectric generator
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Embodiment Construction

[0014] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0015] This embodiment provides a miniature wind-driven piezoelectric generator, which converts wind energy into impacts on the piezoelectric sheet through a turbine, can make full use of the characteristics of the piezoelectric material, improve the electromechanical conversion efficiency of the piezoelectric material, and simplify the generator. The structure can also increase the power density of the generator.

[0016] The structure of the micro wind piezoelectric generator is as follows: figure 1 As shown, it includes a connecting shaft 1, a pneumatic turbine 2, an impact wheel 3, an elastic element 4, a piezoelectric sheet 5 and a casing. The piezoelectric sheet 5 is made of piezoelectric material such as piezoelectric film or piezoelectric ceramics. The connection relationship is as follows: the shell is a closed cylindrical cavity structure compo...

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Abstract

The invention discloses a miniature wind-power piezoelectric generator, which is simple in structure, high in electromechanical conversion efficiency and large in power density. According to an energy conversion mode, the miniature wind-power piezoelectric generator can be divided into two parts, namely an air-driven turbine mechanism and a piezoelectric generator body, wherein the air-driven turbine mechanism converts air-driven mechanical energy into sustainable and stable rotary mechanical energy; and the piezoelectric generator body converts the rotary mechanical energy generated by the air-driven turbine into electric energy and mainly comprises an impulse wheel plate, an elastic element and a piezoelectric sheet. A working process of the miniature wind-power piezoelectric generator is as follows: the air-driven turbine drives the impulse wheel to rotate under blowing of wind, the impulse wheel plate continuously and periodically impacts a piezoelectric material on the elastic element in the rotation process, and the piezoelectric material suffers from the pressure and converts the impact and deformation into electric energy according to the direct piezoelectric effect of the piezoelectric material. A lead wire is connected to the piezoelectric material and used as an electrode of the generator, and a wire which is led out from one surface of the piezoelectric material, which is in contact with the elastic element, is used as another output electrode of the generator.

Description

technical field [0001] The invention relates to a generator, in particular to a micro-wind piezoelectric generator, which belongs to the technical field of energy development. Background technique [0002] At present, the general micro piezoelectric generator adopts the form of vibration, and the disadvantage of the vibrating micro piezoelectric generator is the low conversion efficiency. Micro-wind piezoelectric generators are generally turbine-type micro-wind generators and wind-induced vibration micro-wind generators. The disadvantages of the current turbine-type micro-wind generators are that the structure is relatively complex, the volume is large, and it is difficult to miniaturize; while the power density of wind-induced vibration micro-wind generators is low. Contents of the invention [0003] In view of this, the present invention provides a micro-wind piezoelectric generator, which has a simple structure, high electromechanical conversion efficiency and high pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18F03D9/00
CPCY02E10/72
Inventor 隋丽郭德卿石庚辰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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