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A trapezoidal yoke permanent magnet vibration power generation device

A technology of vibration power generation and trapezoidal magnetic poles, applied in electromechanical devices, electrical components, etc., can solve the problems of not using the magnetic yoke, not suitable for vibration, waste of magnetic field, etc., to improve utilization rate, reduce volume, and improve utilization efficiency Effect

Active Publication Date: 2017-03-22
HEBEI UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing permanent magnet vibration power generation devices are small energy harvesters, and most of them do not use the yoke for magnetic conduction, resulting in a large-scale waste of the magnetic field; they cannot better improve the magnetic flux passing through the coil according to Faraday's law of electromagnetic induction. rate of change, thereby increasing the output induced EMF
The "a low-frequency permanent magnet vibration power generation device" previously applied by our research group is suitable for energy collection under low-frequency and large-displacement conditions. Its main structure is a regular quadrangular prism, including four side plates, upper end cover and lower end cover. The magnetic yoke is used as a magnetic conduction path, which is convenient to place the coil and generate a linearly changing magnetic field; the disadvantage is that the volume is large, and it is not suitable for vibrations with a frequency above 10Hz

Method used

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  • A trapezoidal yoke permanent magnet vibration power generation device
  • A trapezoidal yoke permanent magnet vibration power generation device
  • A trapezoidal yoke permanent magnet vibration power generation device

Examples

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Embodiment 1

[0047] This embodiment adopts the above-mentioned connection method, the top cover 2 and the bottom cover 9 are both cylindrical plates with circular grooves on the edges, and the grooves of the top cover and the bottom cover are used to embed the cylindrical shell 4 in the middle. The six tetragonal permanent magnets 31-36 (each tetragonal permanent magnet is a neodymium iron boron permanent magnet (Nd2Fe14B, model N45)) on each table 37 inside the cylindrical shell 4 are closely attached together longitudinally, The characteristics are reversed, and there are four permanent magnet groups 5 symmetrically and evenly distributed along the housing. Vibration shaft 1 part: choose the aluminum alloy (non-magnetic material) whose middle part is a regular quadrangular prism body and the upper and lower parts are cylindrical as the vibration shaft 1 to avoid affecting the magnetic circuit. The total length of the vibrating shaft is 120mm, and the diameter at both ends is 8mm. The size...

Embodiment 2

[0052] The connection method of this embodiment is the same as that of Embodiment 1, the difference is that the top cover 2 and the bottom cover 9 are tightly connected with the outer shell 4 through a matching tenon-and-mortise joint structure. The power generating device can output a larger output voltage when the vibration frequency is 1-20 Hz and the vibration displacement peak value is 1-20 mm.

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Abstract

The invention relates to a permanent magnetic vibration generation apparatus with trapezoidal magnetic yokes. The permanent magnetic vibration generation apparatus is characterized in that a main body structure of the generation apparatus is a cylindrical structure and comprises a cylindrical housing, a top cover, a vibration shaft and a bottom cover; upper and lower ends of the housing are fixedly connected with the top cover and the bottom cover through bolts respectively; a cylindrical through hole is formed in the center of the top cover; a coil outlet through hole is formed in one side of the center of the top cover; a hollow cylindrical hub is mounted in the center of the upper part of the bottom cover; a spring is arranged in a bottom hollow part of the hub; the lower part of the vibration shaft is in contact with the spring in the hub; the upper end of the vibration shaft vertically penetrates through a linear bearing and the top cover fixed with the vibration shaft, and is higher than the top cover; a regular quadrangular prism body is arranged in the middle of the vibration shaft; both upper and lower parts of the vibration shaft adopt cylindrical structures; quadrangular prism grooves are formed in four side surfaces of the regular quadrangular prism body in the middle; a trapezoidal magnetic yoke is bonded in each quadrangular prism body; and the four trapezoidal magnetic yokes are identical in shape and structure.

Description

Technical field [0001] The invention relates to a vibration power generation device that converts vibration energy in the environment into electrical energy, in particular to a trapezoidal yoke permanent magnet vibration power generation device. The core part is a vibration shaft, a trapezoid yoke and a hollow cylindrical shell. The permanent magnet vibration power generation device can form a closed magnetic circuit between the trapezoidal yoke and the permanent magnet, which improves the utilization rate of the magnetic field. Background technique [0002] Permanent magnet vibration power generation device is a power generation device that uses Faraday's law of electromagnetic induction to convert environmental vibration energy into electrical energy. It has the advantages of large power generation and easy maintenance. [0003] According to the different vibrating parts, permanent magnet vibration power generation devices can be divided into three types: moving iron (magnet move...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K35/02
Inventor 王博文李恒王鹏王志华
Owner HEBEI UNIV OF TECH
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