Device for collecting magnetic field energy of electrical power supply line and power supply line status monitoring system

A technology of magnetic field energy and power supply lines, applied in the field of magnetic field energy collection devices, can solve the problems of limited actual distance and limited application

Inactive Publication Date: 2011-12-28
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of this energy harvesting method is limited (it can only be used at the plug), and because the actual distance between the plug forks is limited,

Method used

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  • Device for collecting magnetic field energy of electrical power supply line and power supply line status monitoring system
  • Device for collecting magnetic field energy of electrical power supply line and power supply line status monitoring system
  • Device for collecting magnetic field energy of electrical power supply line and power supply line status monitoring system

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Embodiment Construction

[0020] The collectors used to collect the magnetic field energy of wires in the prior art either need to install the collector at the plug fork to collect. Due to the structural size limitation of the plug fork, the collection effect is very poor, or it is necessary to install the commonly used multi-wire The structure of the cable is modified, resulting in an increase in cost. In order to overcome the problem that the collection device is limited by the structural size, the present invention proposes a device for collecting the magnetic field energy of the power supply line. A plurality of transducers 2 with magnetoelectric conversion functions are arranged in the magnetic field area excited by the current outside the wire and cable 1. The direction of the magnetic field of the transducer 2 is parallel to the direction of the magnetic field excited by the wire and cable 1 at the location of the transducer 2; the size of the transducer 2 along the perimeter of the wire and cabl...

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Abstract

The invention discloses a device for collecting the magnetic field energy excited by the electric current of a power supply line. The direction of the magnetic field excited by the current in the wire and cable at the location of the transducer is parallel; the size of the transducer along the circumference of the wire and cable is less than 1/4 of the circumference of the cross section of the wire and cable. The invention also discloses a self-powered wireless sensor based on the aforementioned structure, and a power supply line state monitoring system based on the self-powered wireless sensor. The beneficial technical effect of the present invention is: the magnetic field energy excited by the current in the electrical power supply line (including single-wire, double-wire, and three-wire cables) can be collected to obtain electric energy; the collected energy can be used to drive the self-powered wireless sensor to operate and form a power supply line Condition Monitoring System.

Description

technical field [0001] The invention relates to a magnetic field energy collection device, in particular to a device for collecting magnetic field energy of electrical power supply lines and a power supply line state monitoring system. Background technique [0002] The magnetic field generated by current is a basic physical phenomenon. When AC current flows through the transmission / power supply line, an alternating magnetic field surrounding the wire will be generated at the same time. Through electromagnetic induction, an alternating magnetic field can be converted into an electric current. That is to say, electricity can be obtained without directly connecting the wires. According to the principle of electromagnetic induction, the induced electromotive force generated by the alternating magnetic field is proportional to the rate of change of the magnetic flux in the closed loop of the wire. For an alternating magnetic field of a given frequency, it can also be expres...

Claims

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Application Information

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IPC IPC(8): H02J17/00H02J50/10
Inventor 文玉梅李平杨进
Owner CHONGQING UNIV
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