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A magnetic field modulation up-frequency electromagnetic energy harvesting device

A magnetic field modulation and energy harvesting technology, applied in electromechanical devices, mechanical energy control, magnetic circuit shape/style/structure, etc., can solve the problems of limited output power and low energy harvesting efficiency

Active Publication Date: 2021-07-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • A magnetic field modulation up-frequency electromagnetic energy harvesting device
  • A magnetic field modulation up-frequency electromagnetic energy harvesting device
  • A magnetic field modulation up-frequency electromagnetic energy harvesting device

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] refer to figure 1 , figure 2 , image 3 , Figure 4 , an electromagnetic energy harvesting device of a magnetic field modulation up-frequency type, comprising a central shaft 9 on which an up-frequency magnetic ring 4, a magnetic field modulation ring 8, an energy-harvesting magnetic ring 11 and a base 15 are installed from top to bottom; The frequency magnetic ring 4 is connected on the central shaft 9 through the first bearing 3, the energy-capturing magnetic ring 11 is connected on the central shaft 9 through the second bearing 10, and the frequency-up magnetic ring 4 and the energy-capturing magnetic ring 8 can pass through the first bearing respectively 3 and the second bearing 10 freely rotate around the central axis 9; the magnetic field modulation ring 8 and the base 15 are fixed on the central axis 9;

[0030] The first magnet gro...

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Abstract

An electromagnetic energy harvesting device of magnetic field modulation up-frequency type, comprising a central shaft on which an up-frequency magnetic ring, a magnetic field modulation ring, an energy-harvesting magnetic ring and a base are installed from top to bottom; the up-frequency magnetic ring, the energy-harvesting magnetic The ring is connected to the central shaft through bearings, the magnetic field modulation ring and the base are fixed on the central shaft; the first magnet and the inertial mass block are installed on the up-frequency magnetic ring, the high magnetic permeability material sheet is installed on the magnetic field modulation ring, and the energy-capturing magnetic A second magnet is installed on the ring, and multiple coils are evenly arranged in a ring on the base; under the action of external excitation, the inertial mass drives the first magnet on the up-frequency magnetic ring to rotate, generating an alternating harmonic magnetic field. Under the modulation of the magnetic field modulation ring, the harmonic frequency changes, acting on the second magnet of the energy-capturing magnetic ring, driving the energy-capturing magnetic ring to rotate at a higher speed, so that the magnetic flux inside the multiple coils changes, and an induced voltage is generated. The invention can meet the energy supply needs of wireless sensor network nodes and wearable devices.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/06H02K1/22H02K1/27H02K3/28H02K7/02
CPCH02K1/06H02K1/22H02K1/2793H02K3/28H02K7/02Y02E60/16
Inventor 曹军义周宁侯泽昊雷亚国
Owner XI AN JIAOTONG UNIV
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