Cord-driven two-degree-of-freedom electromagnetic energy harvester

Abstract

The invention relates to a cord-driven two-degree-of-freedom electromagnetic energy harvester and belongs to the technical field of new energy and micro power generation. The energy harvester is characterized by at least comprising a base, a supporting cylinder, a top cover, a spring, a rotor, a cord, a guide rod, four magnets and four coils, wherein the supporting cylinder comprises a large counter bore, a small counter bore and four supporting cylinder grooves, the large counter bore is located at a bottom face of the supporting cylinder and is coaxial with the supporting cylinder, the smallcounter bore is formed on a top surface of the supporting cylinder and is coaxial with the supporting cylinder, the four supporting cylinder grooves are evenly distributed on a side face of the supporting cylinder, a lower end of the spring is fixedly connected with the small counter bore of the supporting cylinder, and the large counter bore of the supporting cylinder is sleeved on a cylinder ofthe base to connect the spring with the base. The energy harvester is advantaged in that the rotor is driven by a code, external low-frequency vibration, linear reciprocating motion, pressing motionand other excitations can be converted into high-speed rotating motion of the rotor, and the motor has advantages of wide working frequency band, large output power, wide application range and the like.

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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