A trapezoidal yoke permanent magnet vibration power generation device

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...

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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

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