Magnetic field modulation frequency rising type electromagnetic energy harvesting device

Abstract

A magnetic field modulation frequency rising type electromagnetic energy harvesting device comprises a central shaft, wherein a frequency-rising magnetic ring, a magnetic field modulation ring, an energy harvesting magnetic ring and a base are installed on the central shaft from top to bottom; the frequency rising magnetic ring and the energy harvesting magnetic ring are connected to the central shaft through bearings, and the magnetic field modulation ring and the base are fixed to the central shaft; and a first magnet and an inertia mass block are installed on the frequency-raising magneticring, a high-permeability material sheet is installed on the magnetic field modulation ring, a second magnet is installed on the energy harvesting magnetic ring, and a plurality of coils are annularlyand uniformly arranged on the base. Under the action of external excitation, the inertia mass block drives the first magnet on the frequency raising magnetic ring to rotate, and an alternating harmonic magnetic field is generated; under the modulation of the magnetic field modulation ring, the harmonic frequency is changed and acts on the second magnet of the energy harvesting magnetic ring to drive the energy harvesting magnetic ring to rotate at an increased speed, so that the magnetic flux inside the coils is changed, induced voltage is generated, and the energy supply requirements of thefields of wireless sensor network nodes, wearable equipment and the like can be met by means of the magnetic field modulation frequency rising type electromagnetic energy harvesting device.

Description

technical field [0001] The invention belongs to the technical field of energy harvesting devices, in particular to an electromagnetic energy harvesting device of a magnetic field modulation up-frequency type. Background technique [0002] With the continuous development of microelectronics technology, new microelectronic devices emerge in an endless stream, such as wireless sensor network nodes and wearable devices, which play an important role in the fields of aerospace, transportation, building condition monitoring and human health monitoring. . With the increasing application of microelectronic devices, how to provide a stable and continuous energy supply has become an urgent problem to be solved. Traditional batteries have problems such as limited life, low energy density, and possible environmental pollution, especially in When powering implanted devices, such as sensors inside bridges and artificial pacemakers inside the human body, battery replacement becomes inconve...

AI Technical Summary

Problems solved by technology

[0004] Existing energy harvesting devices have the disadvantages of low energy harvesting efficiency and limited output power

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