A Piezoelectric-Electromagnetic Composite Energy Harvesting Device Based on Automobile Suspension

Abstract

The invention discloses a piezoelectric and electromagnetic composite energy-capturing device based on an automotive suspension. A body is arranged between a frame cross member and a lower suspension arm. The piezoelectric and electromagnetic composite energy-capturing device comprises an upper shell, a lower shell, an elastic beam, a first rigid beam and a second rigid beam, wherein the upper shell is fixed at the lower part of the frame cross member; the elastic beam is arranged in the upper shell; a piezoelectric plate is arranged at the upper end of the elastic beam, and a first magnet is arranged at the lower end of the elastic beam; the lower shell is fixed at the upper part of the lower suspension arm and is arranged corresponding to the upper shell; the first rigid beam and the second rigid beam are symmetrically arranged in the lower shell; a second magnet is arranged at the part, corresponding to the first magnet on the elastic beam, at the upper end of the second rigid beam; a coil is arranged at the outer end of the second magnet; one side of the coil is fixed onto the second rigid beam. The piezoelectric and electromagnetic composite energy-capturing device has the beneficial effects that the charging time is shortened, and power supply for rechargeable batteries is more facilitated; moreover, due to the fact that the original structure of the automotive suspension is not changed, the device is simple in structure and convenient to maintain.

Description

technical field [0001] The invention relates to a composite energy harvesting device, in particular to a piezoelectric-electromagnetic composite energy harvesting device based on an automobile suspension. Background technique [0002] At present, with the aggravation of the energy crisis, energy saving becomes particularly important, and the recovery of vibration energy is an effective method of energy saving. At present, there are three main ways to recover vibration energy, that is, to convert vibration energy into electrical energy: (1) the piezoelectric type that converts vibration energy into electrical energy by using the piezoelectric effect of piezoelectric materials; (2) convert vibration energy into electrical energy by using electromagnetic induction Electromagnetic type that converts into electric energy; (3) Electrostatic type that uses the principle of capacitance to convert vibration energy into electric energy. The three vibration energy capture methods have...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a piezoelectric-electromagnetic composite energy harvesting device based on automobile suspension in order to solve the problem of how to broaden the working frequency band of the energy harvester and increase the output power

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