Magnetic conductive material based piezoelectric-electromagnetic composite vibration energy capturing device

A technology of magnetic conductive material and vibration energy, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electromechanical devices, generators/motors, etc. and other problems, to achieve the effect of reducing the resonant frequency, improving the electromagnetic capture ability, and good low-frequency applicability

Inactive Publication Date: 2017-07-25
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing piezoelectric vibration power generation devices still have the problems of poor environmental...

Method used

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  • Magnetic conductive material based piezoelectric-electromagnetic composite vibration energy capturing device
  • Magnetic conductive material based piezoelectric-electromagnetic composite vibration energy capturing device
  • Magnetic conductive material based piezoelectric-electromagnetic composite vibration energy capturing device

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0031] Such as figure 1 , figure 2 As shown, a piezoelectric cantilever with an end mass consists of:

[0032] The left end of the cantilever beam is fixed in the environment, and there is a piezoelectric sheet on its surface, which can be a piezoelectric ceramic 1; the cylindrical iron core is a magnetic material with high relative magnetic permeability, and its upper end is fixed on the cantilever beam. The end of 2; three groups of parallel ring-type permanent magnets a, b and c are magnetized by the inner circle radiation magnetization, and the magnetization directions of b and a and c are opposite (the outer ring of b is N pole, a and c outer ring is S pole, or both are opposite polarity); a, b and c have the same size, and the thickness is equal to their spacing, and are inserted and fixed on the iron core 3; the diameter of the iron core ...

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Abstract

The invention discloses a magnetic conductive material based piezoelectric-electromagnetic composite vibration energy capturing device, which comprises a base, a cantilever beam, a piezoelectric plate, three hollow permanent magnets, an iron core, a magnetic yoke and an induction coil, and is characterized in that the piezoelectric plate is arranged at the upper surface of the cantilever beam, one end of the cantilever beam is fixed in the environment, one end of the iron core is fixed at the tail end of the cantilever beam, and the three hollow permanent magnets are parallelly inserted and fixed on the iron core; the internal part of the magnetic yoke is provided with two groups of parallel magnetic teeth, the induction coil is placed between the two groups of magnetic teeth, and the bottom end of the magnetic yoke is fixed on the base; and the permanent magnets are located right above the magnetic yoke. The piezoelectric-electromagnetic power generation device can better adapt to capturing for random, wideband, low-frequency, large-amplitude and high-strength vibration energy in the environment.

Description

technical field [0001] The invention relates to the technical field of new energy, in particular to a piezoelectric-electromagnetic composite vibration energy capture device based on a magnetically permeable material. Background technique [0002] The rapid development of information technology has not driven the rapid development of power supply technology, and the energy density of power supply has not improved significantly. Although chemical energy batteries are widely used due to their convenience, problems such as environmental pollution, difficulty in recycling, and waste of materials are becoming more and more prominent. Therefore, the search for alternative energy sources has become a hot topic in today's research. One possible approach is to capture energy from ambient vibrations. Around our living environment, there are various waste energies, such as solar energy, pressure energy, mechanical vibration energy and so on. Although solar energy and pressure energy...

Claims

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Application Information

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IPC IPC(8): H02N2/18H02K35/02
CPCH02N2/18H02K35/02
Inventor 江兵徐红斌刘毅臧鑫善廖沁祎
Owner NANJING UNIV OF POSTS & TELECOMM
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