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Magnetic core split type magnetic field energy collecting device

A magnetic field energy collection device technology, applied in the field of independent environmental energy collection design, can solve the problems of complicated disassembly and difficult installation

Pending Publication Date: 2021-03-26
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But correspondingly, there are also great limitations. Since the wrap-around collector must be installed on the power line, this design is difficult to install and complicated to disassemble for overhead power lines and underground cables.

Method used

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  • Magnetic core split type magnetic field energy collecting device
  • Magnetic core split type magnetic field energy collecting device
  • Magnetic core split type magnetic field energy collecting device

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Embodiment Construction

[0030] specific implementation plan

[0031] The specific embodiments of the present invention will be described in detail below in combination with the accompanying drawings and the technical solutions of the description.

[0032] 1. The principle of independent magnetic field acquisition

[0033] The principle of independent magnetic field collection is as follows: figure 1 As shown, if a straight wire passes through an alternating current I, an alternating magnetic field B will be generated around the wire, and the collector in the area of ​​the changing magnetic field will generate an induced electromotive force at both ends of the coil.

[0034] The equivalent circuit model of the magnetic field energy harvester is as figure 2 Shown, including the induced electromotive force u 0 , Internal impedance R S , self-inductance L S , compensation capacitor C S and load R L .

[0035] According to Faraday's law of electromagnetic induction, the following formula is obtai...

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Abstract

The invention discloses a magnetic core split type magnetic field energy collection device, and belongs to the field of independent environment energy collection design. Based on the Faraday law of electromagnetic induction, the relation between the shape of the magnetic field collecting device and the output power density is determined with the maximum improvement of the output power density as the target in the design process of the independent magnetic field energy collecting device. Secondly, according to magnetic core equivalence analysis, a magnetic field energy collection mode that thecylinder is optimized into a split type in the first step is determined, an effective magnetic conductivity expression is obtained, and the accuracy of the effective magnetic conductivity expression is analyzed; due to the advantage that the new shape is movable after the first step of optimization, the splitting distance of the magnetic field energy collecting device is optimized in the second step, and the two ends of the magnetic core are separated by the same distance to improve output; and finally, the structural stability of the collector is considered to determine that the 80mm split magnetic core is in an optimal shape. In the simulation, the output power is optimized to be 4.05 times of the original output power, and the power density is optimized to be 6.07 times of the originaloutput power.

Description

technical field [0001] The invention provides a magnetic core split type magnetic field energy collection device, which belongs to the field of independent environmental energy collection design. Background technique [0002] With the development and application of ultra-low power wireless sensors, the research on magnetic field energy harvesting is also carried out. This kind of harvesting method mainly supplies power to sensors near AC power lines. Magnetic field energy harvesting technologies mainly include two types: wraparound and independent. In the initial research process, most of them rely on the surrounding electromagnetic induction collection method, and the collector is installed on the line to collect the changing magnetic field around the alternating current. [0003] But correspondingly, there are also great limitations. Since the wrap-around collector must be installed on the power line, this design is difficult to install and complicated to disassemble for ...

Claims

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Application Information

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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 李冠林张书铭
Owner DALIAN UNIV OF TECH
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