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Electrostatic-piezoelectric-electromagnetic composite energy harvester

A piezoelectric energy harvesting, composite technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of low output power, low conversion efficiency, difficult to meet Problems such as the electricity demand of low-power electronic products, to achieve the effect of increasing the power generation current, low maintenance costs, and saving manpower and material costs

Inactive Publication Date: 2019-05-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, there are still disadvantages such as low conversion efficiency and low output power, which make it difficult to meet the electricity demand of low-power electronic products

Method used

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  • Electrostatic-piezoelectric-electromagnetic composite energy harvester
  • Electrostatic-piezoelectric-electromagnetic composite energy harvester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] See figure 1 , Piezoelectric-electrostatic-electromagnetic composite energy harvester includes: shell 1, low-frequency beam 2, magnet 3, toroidal coil 4, piezoelectric ceramic material 5, high-frequency beam 6, upper electrode 7, electret 8, lower electrode 9. Circuit board 10, bolt 11, upper electrode lead 12, lower electrode lead 13, piezoelectric sheet positive lead 14, piezoelectric sheet negative lead 15, coil positive lead 16, coil negative lead 17;

[0044] The low-frequency beam 2 is fixed on the shell 1 by one end of the bolt 11, and a magnet 3 is attached to the bottom of the other end. The toroidal coil 4 is placed horizontally inside the shell 1 and fixed in contact with the three inner walls of the shell 1. The upper end of the coil 4 and the low-frequency beam 2 have a gap , There is a gap between the lower end and the piezoelectric ceramic material 5.

[0045] One end of the high-frequency beam 6 is fixed to the housing 1 by bolts, the piezoelectric ceramic ma...

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PUM

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Abstract

The application discloses an electrostatic-piezoelectric-electromagnetic composite energy harvester, which includes a piezoelectric energy harvesting unit, an electromagnetic energy harvesting unit and an electrostatic energy harvesting unit. The electrostatic energy harvesting unit is used for generating electric energy by vibrating an upper electrode relative to a lower electrode under the trigger of high-frequency vibration generated by the surrounding environment. The energy harvester can harvest electrostatic, electromagnetic and piezoelectric energy at the same time. The electrostatic, piezoelectric and electromagnetic energy harvesting units are optimized. Compared with an energy harvester with a single or two energy harvesting modes, the energy acquisition efficiency and output power of the energy harvester in various environments are greatly improved.

Description

Technical field [0001] The application relates to an electrostatic-piezoelectric-electromagnetic composite energy harvester, belonging to the field of electrostatic-piezoelectric-electromagnetic composite energy harvesters. Background technique [0002] Currently, well-known power supply components include lithium batteries and lead storage batteries. In some cramped or extreme environments, these chemical batteries cannot be replaced or can not stably provide electrical energy. [0003] Vibration in the environment is everywhere and it is a kind of green energy. Obtaining vibration energy from the environment and storing it for direct use is an effective measure to solve the problem of conventional battery energy supply. [0004] The current mainstream energy harvesters have made great progress in obtaining environmental vibration energy, including piezoelectric energy harvesters, electromagnetic energy harvesters, and piezoelectric-electromagnetic energy harvesters. However, ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N1/08H02N2/18H02K35/02
Inventor 郭胜凯高世桥金磊刘海鹏牛少华张希洋
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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