A two-degree-of-freedom electromagnetic energy harvester driven by a wire rope

Abstract

The invention relates to a wire-driven two-degree-of-freedom electromagnetic energy harvester, which belongs to the technical field of new energy and miniature power generation. Rod, four magnets, four coils; the supporting cylinder includes a large counterbore, a small counterbore and four supporting cylinder grooves; the large counterbore is located on the bottom surface of the supporting cylinder and is coaxial with the supporting cylinder; the small The counterbore is located on the top surface of the support cylinder and is coaxial with the support cylinder; the four support cylinder grooves are evenly distributed on the side of the support cylinder; the lower end of the spring is fixedly connected with the small counterbore of the support cylinder, while the support cylinder The large counterbore is overlaid on the cylinder of the base to connect the spring with the base. The invention drives the rotor by wires, and can convert external low-frequency vibration, linear reciprocating motion, pressing motion and other excitations into high-speed rotating motion of the rotor, and has the characteristics of wide operating frequency, large output power, and wide application range.

Description

technical field [0001] The invention belongs to the technical field of power generation, and in particular relates to a two-degree-of-freedom electromagnetic energy harvester driven by wires, which is suitable for portable electronic devices, wearable systems, micro sensors, etc. that need to capture the surrounding ultra-low frequency mechanical energy for energy supplementation low power devices. Background technique [0002] The rapid development of modern microelectronics and micro-manufacturing technology has led to the emergence of various low-power miniature devices. Although traditional electrochemical batteries can drive these tiny devices to work normally, many defects of batteries, such as limited energy storage, harmful chemical components, and high cost of regular replacement, force people to seek new energy technologies. The ideal power supply scheme is to convert the renewable energy present in the environment into electrical energy that can be used by low-po...

AI Technical Summary

Problems solved by technology

The problems of this energy harvester include: (1) The rotor has a small torsion angle and low output power; (2) It needs to be placed vertically and can only work under the excitation of the vertical direction; (3) The rotor and cylinder There is friction and collision between the walls, and the energy loss is large

The problems of the energy harvester include: (1) The single-degree-of-freedom characteristic of the energy harvester leads to a narrow operating frequency band; (2) It can only work under the excitation of the vertical direction, which limits the work of the energy harvester environment; (3) The collision and friction between the rotor and the cylinder wall will cause a large energy loss and reduce the output power of the energy harvester

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