A two-degree-of-freedom piezoelectric-electromagnetic hybrid energy harvester

Abstract

The invention belongs to the technical field of renewable energy and miniature power generation, and particularly relates to a two-degree-of-freedom piezoelectric electromagnetic hybrid energy harvester. The energy harvester at least comprises a U-shaped cantilever beam, magnets, a detachable fixture, a frame, a coil, a cylinder, a fixed fixture and a spring; the U-shaped cantilever beam is composed of a first piezoelectric cantilever beam and a second piezoelectric cantilever beam, the opening end of the U-shaped cantilever beam is fixedly connected with the vertical wall of the frame, and the free end of the U-shaped cantilever beam is fixedly connected with the first magnet; a piezoelectric energy harvester body is formed by the U-shaped cantilever beam, the detachable fixture and the first magnet; the coil is formed by winding enameled wires along the right half part of the outer wall of the cylinder; the cylinder is fixedly connected with the vertical wall of the frame; the fixedfixture is used for clamping the second magnet; the homopolar parts of the second magnet and the first magnet are opposite to each other; an electromagnetic energy harvester body is formed by the fixed fixture, the second magnet, the spring and the coil. The two-degree-of-freedom piezoelectric electromagnetic hybrid energy harvester has the advantages of being simple and compact in structure, highin energy collection efficiency and low in use cost.

Description

technical field [0001] The invention belongs to the technical field of renewable energy and micro power generation, and in particular relates to a hybrid energy harvester based on piezoelectric effect and electromagnetic induction effect, which is suitable for micro sensors, micro actuators, wearable electronic devices, etc. A low-power device that captures energy for energy supplementation. Background technique [0002] The continuous advancement of technologies such as microelectronics, micromechanics, and micromanufacturing has promoted the continuous emergence of various low-power devices such as microsensors, microactuators, microsignal transmitters, and wearable electronic devices. The power consumption of these devices is small, typically in the milliwatt range. Currently, these low-power devices are powered primarily by electrochemical batteries. The battery has limited energy storage and short service life, and needs to be charged or replaced regularly, which brin...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a two-degree-of-freedom piezoelectric-electromagnetic hybrid energy harvester with simple and compact structure, low cost of use, and a wide range of applications, so as to overcome the existing piezoelectric, electromagnetic The output power of piezoelectric and electromagnetic hybrid energy harvesters is low, and they cannot efficiently collect low-frequency vibration energy.

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