Low-frequency vibration electromagnetic energy harvesting device

Abstract

The invention provides a low-frequency vibration electromagnetic energy harvesting device. The device includes an energy collector housing, a cantilever beam elongated plate, a cantilever beam short plate, a collision mass block, a magnetic field generation piece and a multi-turn coil. The environment is vibrated so as to provide vibration excitation to the energy collector housing. The cantilever beam elongated plate and the cantilever beam short plate vibrate along with the vibration excitation. The collision mass block collides with the cantilever beam elongated plate at a preset position of the cantilever beam elongated plate, such that the cantilever beam elongated plate generates vibration at a frequency close to the inherent frequency of the cantilever beam elongated plate. The multi-turn coil and the cantilever beam elongated plate vibrate at the same frequency. When a magnetic induction line is cut, an electrical signal is generated. According to the invention, the electromagnetic energy collector can collect low-frequency vibration electromagnetic energy, and greatly increases low-frequency energy harvest bandwidth of an electromagnetic cantilever beam structure.

Description

technical field [0001] The invention belongs to the technical field of energy collection, and more specifically relates to a low-frequency vibration electromagnetic energy collector. Background technique [0002] Vibration is a fundamental physical phenomenon in nature. There are many ways to convert vibration energy into electrical energy for energy harvesting, such as piezoelectric, capacitive, and electromagnetic. Among them, capacitive energy harvesting requires a separate pre-charging source, and piezoelectric energy harvesting is complicated. [0003] For the electromagnetic harvesting method, with the miniaturization of the device structure, the natural frequency of the device is greatly increased, which leads to the energy harvesting of low-frequency vibrations, especially the vibration frequency below 60Hz, and there is a bottleneck in the industrialization of energy harvesting. [0004] Therefore, there is an urgent need for a technical solution that can effectiv...

AI Technical Summary

Problems solved by technology

Among them, capacitive energy harvesting requires a separate pre-charging source, and piezoelectric energy harvesting is complex.

[0003] For the electromagnetic harvesting method, with the miniaturization of the device structure, the natural frequency of the device is greatly increased, which leads to the energy harvesting of low-frequency vibrations, especially the vibration frequency below 60Hz, and there is a bottleneck in the industrialization of energy harvesting.

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