Stress sensitivity transformer iron core with protecting box and stress-free fixing method thereof

Abstract

The invention discloses a stress sensitivity transformer iron core with a protecting box and a stress-free fixing method thereof. The stress sensitivity transformer iron core with the protecting box comprises the protecting box and the stress sensitivity transformer iron core which is arranged in the protecting box. The stress sensitivity transformer iron core is wrapped in a stress-free adhesive and is connected with the stress-free adhesive in an agglutination way; and the stress-free adhesive is connected with the inner surface of the protecting box in the agglutination way. The stress-free fixing method comprises the following step of filling the stress-free adhesive into the protecting box of the stress sensitivity transformer iron core so that the stress sensitivity transformer iron core is wrapped in the stress-free adhesive and the stress sensitivity transformer iron core is not in rigid contact with the protecting box. According to the stress sensitivity transformer iron core with the protecting box, which is fixed by the stress-free fixing method of the stress sensitivity transformer iron core, the stress sensitivity transformer iron core is fixed without stress and is relatively high in impact resistance, so that the stability of magnetic performance is ensured, the vibration of the stress sensitivity transformer iron core can also be reduced, and further distortion and loss are reduced.

Description

Technical field: [0001] The invention relates to a transformer iron core and a fixing method thereof, in particular to a stress-sensitive transformer iron core with a protective box and a stress-free fixing method thereof. Background technique: [0002] Iron-based alloy cores with high magnetic permeability such as permalloy and amorphous alloy are widely used at present, especially in the field of modern communication, broadband small transformers cannot do without permalloy, amorphous (or microcrystalline) iron Iron cores of high magnetic permeability alloys such as base alloys. But this kind of high magnetic permeability alloy has a common disadvantage, that is, it is sensitive to stress, and once it is stressed, its magnetic properties will be greatly reduced. In the process of processing, the magnetic core after processing must go through strict vacuum annealing procedures to eliminate internal stress, so as to ensure the magnetic performance. Moreover, the annealed m...

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Problems solved by technology

[0005] However, this structure has the following defects: 1. When the upper and lower protective boxes compress the sponge tightly, the stress-sensitive iron core is subjected to compressive stress. This stress acts on the stress-sensitive iron core for a long time, which will cause continuous loss of magnetic properties. decline

However, the method of dipping (or pouring) paint or epoxy cannot be applied to the stress-sensitive alloy core of high-permeability magnetic base alloy.

The problem is the stress sensitive nature of these cores

Whether it is paint or epoxy glue, serious deformation internal stress will be generated during the drying and curing process, and it will cause a huge loss of magnetic properties when used on a high magnetic permeability iron-based alloy core (stress-sensitive transformer core)

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