Vibration power generation device

Abstract

The invention discloses a vibration power generation device comprises a power generation part and a support part, wherein the power generation part comprises a top cover, an upper permanent magnet, a magnetostrictor and a lower permanent magnet which are sequentially laminated and fixed, a coil is wound around the magnetostrictor, and the support part comprises an elastic part and a base. During usage, pressure is applied to the top cover, so that the upper permanent magnet, the magnetostrictor, the coil and the lower permanent magnet downwards move together to cause change of the length of a magnetic path, the coil generates a changing magnetic field, and an induced electromotive force is generated in the coil according to a Faraday law of electromagnetic induction, namely electromagnetic power generation; and when the top cover is pressed, the base is extruded by the lower permanent magnet and is knocked, so that the magnetic path is closed, meanwhile, a generated counter-reacting force acts on the magnetostrictor, the changing magnetic field is generated in the coil according to an inverse magnetostriction effect, and the induced electromotive force is further generated, namely piezomagnetic power generation. The device is simple to design and comprises two power generation processes of electromagnetic power generation and piezomagnetic power generation, and the power generation efficiency is improved.

Description

technical field [0001] The invention relates to the field of power generation, more specifically, to a vibration power generation device. Background technique [0002] Electric energy is a common power source, especially in summer, with the increase of various household electrical equipment, the consumption of electric energy continues to soar. There are many kinds of electric energy generation, such as relying on solar energy, wind energy, geothermal energy, etc., but the utilization of such energy is affected by external environmental factors, and the scope of application is limited. Therefore, in recent years, vibration power generation that is not affected by environmental and other factors has gradually become a research hotspot. [0003] As far as the prior art is concerned, there are mainly four types of devices that generate electricity through vibration: piezoelectric, electrostatic, electromagnetic, and giant magnetostrictive. The structure of the vibration power...

AI Technical Summary

Problems solved by technology

The structure of the vibration power generation device on the market is relatively complex, and the volume is large, which is contrary to the current design concept of miniaturization and wireless design of the device; and the working frequency band of this type of device is relatively high, and it is difficult to identify it in the case of small vibration, such as Stepping vibration, etc., so the application range is limited and the power generation efficiency is low

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