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Shielding apparatus for high-intensity magnetic field

A shielding device and strong magnetic field technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve difficult magnetic shielding problems, reduce heat generation and other problems, and achieve the effect of preventing premature saturation and reducing heat generation

Pending Publication Date: 2021-06-25
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a shielding device for a strong magnetic field to solve the problem of magnetic shielding under the interference of a high-intensity magnetic field that is difficult for a traditional shielding cover device, and to reduce the heating caused by the eddy current effect under an AC magnetic field

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  • Shielding apparatus for high-intensity magnetic field
  • Shielding apparatus for high-intensity magnetic field
  • Shielding apparatus for high-intensity magnetic field

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Embodiment Construction

[0042] In order to enable those skilled in the art to better understand the technical solutions in the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application; obviously, the described implementation Examples are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0043] The alternating magnetic field shielding uses a good conductor with low resistivity. The shielding principle uses the eddy current reverse magnetic field generated by the electromagnetic induction phenomenon on the surface of the shield to achieve the purpose of shielding, that is, the use of the eddy current reverse magnetic field for the original...

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Abstract

The invention provides a shielding apparatus for a high-intensity magnetic field. According to the shielding apparatus for the high-intensity magnetic field, the shielding apparatus is a composite shielding apparatus comprising multiple layers of shielding devices, and the multiple layers of shielding devices are formed by coaxially surrounding shielding covers made of various different materials; the innermost layer of the composite shielding apparatus is provided with a magnetism gathering ring, and one side of the magnetism gathering ring is provided with an opening; an air gap structure is arranged on the shielding device on the outermost layer of the composite shielding apparatus; and the opening of the air gap structure and the opening of the magnetism gathering ring are arranged back to back. The shielding apparatus is designed to be of a multi-layer structure, and different layers are formed by combining different materials, so the shielding apparatus solves the problem of magnetic saturation of the shielding covers in a strong magnetic field environment; and in a high magnetic field interference environment, even if the shielding cover on the outer layer is magnetically saturated, the shielding cover on the innermost layer still effectively protects a shielded body to achieve a shielding effect. Meanwhile, the apparatus is not totally closed and is of an open type shielding structure capable of being used for measuring the magnetic field of a wire, and air gaps are reasonably arranged on the outer layer of the multi-layer shielding structure, so premature saturation is prevented, and the heating condition caused by the eddy current effect under an alternating current magnetic field is reduced.

Description

technical field [0001] The present application relates to the technical field of electromagnetic shielding, in particular to a shielding device for strong magnetic fields. Background technique [0002] Shielding is a material with specific properties. Electromagnetic shielding technology refers to the technology of using shielding to prevent or lose the transmission of electromagnetic disturbance energy. It is one of the important means to suppress electromagnetic interference. The most important means of electromagnetic shielding is to use the metal shell to shield the electric field, magnetic field, and electromagnetic field. The sensor shielding design has become a necessary EMC measure because of the high-voltage and harsh electromagnetic environment. [0003] The current transformers and Hall current sensors used to measure the current of the wire measure the current value of the wire by converting the magnetic field signal of the wire under test into an electrical sign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
CPCH05K9/0088
Inventor 崔志刚赵现平沈龙汪耀辉董俊贤高景林洪志湖
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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