Shielding shell of low frequency transformer

A technology for shielding casings and transformers, applied in transformer/inductor casings, magnetic field/electric field shielding, preventing/reducing unwanted electrical/magnetic effects, etc., can solve problems such as increased cost, reduced cost performance, and inconvenient use , to achieve the effect of cost saving, good permanent magnetism and cost saving

Inactive Publication Date: 2010-08-04
蔡建林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Materials are often machined into thin plates, sheets or strips, which not only reduces the magnetic shielding performance

Method used

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Embodiment Construction

[0007] The present invention is further described as follows: a shielding shell is also provided outside the transformer, and the main component of the shell itself is non-metallic material or cheap metal material, and shielding coating is all coated on its inner surface and outer surface. The composition is rare earth alloy powder, which also adds titanate coupling agent, selected non-ionic polymer dextran and anionic polymer sodium alginate as surface modifier of iron powder, diluent and thermoplastic acrylic resin as Adhesive, the micropowder paint made of it is coated on the inner and outer surfaces of the shielding shell, and at the same time, passivation treatment is carried out on the NdFeB coating surface to reduce rust.

[0008] Applying the present invention to the shielding protection of low-frequency transformers, a shielding protective shell is set on the low-frequency transformer. In order to save costs, the shielding shell can be made of cheap materials, and some...

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PUM

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Abstract

The invention provides a shielding shell of a low frequency transformer, wherein a shielding casing is arranged outside the transformer, the casing is made of nonmetal material or cheap metal material; the inner surface and outer surface of the casing are separately coated with a shielding coating; the main component of the coating is rare earth alloy powder, and the coating also contains titanate coupling agent, nonionic high molecular glucan used as surface modifier of iron powder, anionic high molecular sodium alginate used as diluent of iron powder and thermoplastic acrylic acid resin used as adhesive, and the prepared fine powder coating is coated on the inner and outer surfaces of the shielding casing. The significant effect of the invention is to install the shielding protective casing on the low frequency transformer; in order to save cost, cheap material can be used to prepare the shielding casing; and some magnetic materials are coated on the inner and outer surfaces of the casing, and the adopted rare earth alloy powder not only has good permanent magnetism, but also saves the cost.

Description

technical field [0001] The invention relates to a shielding shell, in particular to a shielding shell of a low-frequency transformer. Background technique [0002] With the rapid development of technologies such as electronics and communications, electromagnetic radiation has become a new source of pollution. The World Health Organization lists electromagnetic radiation pollution as the third largest public hazard in the world. Electromagnetic radiation pollution will lead to a series of problems such as electromagnetic interference, electromagnetic environmental pollution and electromagnetic information leakage. Much of the past research has focused on the radiation hazards of electric fields. Now through a large number of investigations and studies, it has been found that the harm of low-frequency magnetic fields is particularly serious. On the one hand, the magnetic field interference generated by the low-frequency magnetic field is an important factor affecting the nor...

Claims

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Application Information

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IPC IPC(8): H01F27/02H01F27/36C09D133/00C09D5/23H05K9/00
Inventor 蔡建林
Owner 蔡建林
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