Vibration power generation device

Abstract

The invention discloses a vibration power generation device, comprising: a push rod, the lower surface of the push rod is fixedly connected with a first permanent magnet, and the two magnetic poles of the first permanent magnet are respectively located at the upper and lower ends; a lower end cover arranged under the push rod , the upper surface of the lower end cover is provided with a second permanent magnet facing the first permanent magnet, the magnetic pole direction of the first permanent magnet is opposite to the second permanent magnet facing it, and a ring-shaped The coil bobbin, the axial direction of the coil bobbin points to the up and down direction, and a coil is wound on the coil bobbin. When the push rod moves down, the first permanent magnet can extend into the corresponding coil bobbin; the mechanical spring used to push the push rod upward is designed to Between the ejector rod and the lower end cover; it is used to limit the limit position of the uppermost limit position of the ejector rod. In this kind of vibration power generation device, the effect of external vibration force will affect the repulsive force generated between the permanent magnets, so as to change the magnetic flux in the coil and realize the effect of converting vibration energy into electric energy, which is convenient to control and simple in structure.

Description

technical field [0001] The invention relates to the technical field of power generation equipment, in particular to a vibration power generation device. Background technique [0002] With the popularity of micro-electromechanical systems (MEMS), it is increasingly important to solve the problem of its energy supply. The miniaturization of devices means that the requirements for power supply are increased. What micro-devices basically use is micro-battery, and what micro-battery basically adopts is chemical battery (like lithium-iodine battery), and these micro-batteries have the shortcoming of chemical pollution, short life. For the problems referred to above, a vibration power generating device has occurred. [0003] Vibration power generation devices are roughly divided into electromagnetic vibration power generation devices, piezoelectric vibration power generation devices based on piezoelectric smart materials, vibration power generation devices based on magnetostricti...

AI Technical Summary

Problems solved by technology

[0004] In a typical vibration power generation device, a fixed permanent magnet, a moving magnet and another fixed permanent magnet are sequentially arranged in the coil part along the axial direction, and the moving magnet is set in a combination of a soft magnet and a permanent magnet. The magnet moves along the axial direction to generate electricity, which is inconvenient to control, the structure is relatively complicated, it is not easy to process, and the production cost is high

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