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Compound type low-frequency magnetic field shield plate

A low-frequency magnetic field, composite technology, applied in the fields of magnetic/electric field shielding, electrical components, layered products, etc., to achieve the effect of light weight, excellent shielding effect, and low price

Inactive Publication Date: 2013-08-28
北京合众研创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the conductivity of copper is better than that of aluminum, the weight of copper is 3.3 times that of aluminum, and the price is much more expensive than aluminum, so relatively, copper is not suitable for use as a shielding material

Method used

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  • Compound type low-frequency magnetic field shield plate
  • Compound type low-frequency magnetic field shield plate
  • Compound type low-frequency magnetic field shield plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 , figure 2 with image 3 As shown, the three-dimensional schematic diagram, the top view and the side view of the composite low-frequency magnetic field shielding plate of the present invention installed on a magnetic field generating source are respectively shown. The composite low-frequency magnetic field shielding plate of the present invention is laid on the periphery of a magnetic field generating source, and the shielding plate shields a group of three-phase three-wire current 5 magnetic field generating sources. In this embodiment 1, the magnitude of the three-phase three-wire current 5 is 100 amperes and the phase difference is 120 degrees, the distance between the phase conductor and the center point of the phase conductor of the three-phase three-wire current 5 is 10cm, and the wire length is 50cm. figure 1 Measurement path 1, measurement path 2, and measurement path 3 in, are all 12 cm away from the shielding plate 4.

[0032] Such as image 3...

Embodiment 2

[0049] Image 6 , Figure 7 with Picture 8 The schematic diagram, top view and side view of the present invention implemented in another magnetic field generating source are respectively shown. The composite low-frequency magnetic field shielding plate of the present invention adopts two types: aluminum plate 17 and silicon steel sheet 18. The combination of shielding metal plate 14 is that aluminum plate 17 is on top and silicon steel sheet 18 is on the bottom to shield the magnetic field of a group of three-phase three-wire current 15 Source of production.

[0050] Such as Picture 9 As shown, the aluminum plate adopts a brick-shaped two-layer stacking method. The length * width of the aluminum plate 17 is 500cm*244cm. The upper layer is composed of four aluminum plates 27 arranged and combined. The size of the aluminum plate 27 is 244cm*122cm. It is composed of two aluminum plates 27 and four aluminum plates 28 arranged and combined, wherein the size of the aluminum plate 28 ...

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Abstract

The invention discloses a compound type low-frequency magnetic field shield plate. The compound type low-frequency magnetic field shield plate is used for shielding of magnetic fields of the surrounding environment of a transformer substation. The compound type low-frequency magnetic field shield plate is composed of a plurality of aluminum plates and a plurality of silicon steel sheets, wherein the aluminum plates are of a multilayer stacking structure, the silicon steel sheets are of a multilayer stacking structure, and the aluminum plates which are brick-shaped and are stacked in a multilayer mode are laid on the tops or at the bottoms of the silicon steel sheets which are stacked in a parallel and multilayer mode. According to the compound type low-frequency magnetic field shield plate, a main magnetic field source of the transformer substation can be shielded by proportional matching of the aluminum plates and the silicon steel sheets, and the strength of electromagnetic fields of the transformer substation can be reduced.

Description

technical field [0001] The invention relates to a magnetic field shielding plate, in particular to a composite low-frequency magnetic field shielding plate. Background technique [0002] Magnetic field shielding refers to the provision of conductive or magnetically permeable materials in a space to reduce the way the magnetic field passes from this space to another space. This effect of reducing the energy of the magnetic field due to the action of the shielding material is called the shielding effect. Generally, metal materials are used for magnetic field shielding, which can be divided into two types: 1. Use materials with high magnetic permeability to guide the magnetic field away from the shielded object to achieve the shielding effect. However, magnetically permeable materials may have hysteresis effects to generate heat and magnetic saturation; 2. Use materials with high conductivity and use eddy currents to generate anti-phase magnetic flux to achieve shielding effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00B32B15/04B32B15/18B32B15/20
Inventor 不公告发明人
Owner 北京合众研创科技有限公司
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