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Noise-reducing transformer iron core structure and manufacturing method thereof

A manufacturing method and technology for transformers, applied in the field of transformers, can solve problems such as high cost and large vibration noise of transformers, and achieve the effects of damping and reducing vibration noise, reducing vibration noise and reducing noise.

Pending Publication Date: 2021-03-09
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned measures to improve the no-load loss and vibration noise of the transformer from the silicon steel sheet material and its overlapping method are costly, and the transformer still has a large vibration noise after using the above method, which fails to fundamentally solve the problem of the core. Vibration and noise problems

Method used

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  • Noise-reducing transformer iron core structure and manufacturing method thereof
  • Noise-reducing transformer iron core structure and manufacturing method thereof
  • Noise-reducing transformer iron core structure and manufacturing method thereof

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Embodiment

[0034] Such as Figure 1-8 The illustrated embodiment provides a noise-reducing transformer core structure of the present invention, which is formed by lapping several silicon steel sheets 1, and fills gaps between adjacent silicon steel sheets 1 laminated at the corners of the transformer core structure. Magnetorheological glue3.

[0035] The magnetostriction curve of the silicon steel sheet used in the present embodiment is as follows Figure 5 As shown, the subsequent simulation and related calculations on the silicon steel sheet 1 are all based on this magnetization curve.

[0036] The magnetorheological glue used in this embodiment can be prepared by the following methods:

[0037] 1) Stir toluene diisocyanate (MDI-50) and castor oil (CO) in a container for 1 hour in a water bath at 75°C;

[0038] 2) In a water bath at 65°C, add 1,4-butanediol (BDO), organic bismuth catalyst, and stir for 1 hour;

[0039] 3) Add carbonyl iron powder and stir for one hour.

[0040] Wh...

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Abstract

The invention discloses a noise-reducing transformer iron core structure and a manufacturing method thereof. The transformer iron core structure is formed by lapping a plurality of silicon steel sheets, and magneto-rheological glue is filled in gaps of adjacent silicon steel sheet laminations lapped at corners of the transformer iron core structure. According to the noise-reducing transformer ironcore structure, the magneto-rheological glue is filled in the lamination gaps of the adjacent silicon steel sheets, part of the magnetic induction lines can pass through the magneto-rheological gluein the lamination gaps due to the magnetic conductivity of the magneto-rheological glue, and compared with the situation that air exists in the lamination gaps, the magnetic lines of force are distributed in the lamination gaps more smoothly; therefore, the magnetic density of the leakage magnetic field around the lamination gap is reduced, the electromagnetic force between the silicon steel sheets is reduced, and the vibration noise between the silicon steel sheet laminations caused by the electromagnetic force is reduced. Meanwhile, due to the damping characteristic of the magneto-rheological glue, part of vibration energy is consumed, and therefore the effects of damping and reducing vibration noise are further achieved.

Description

technical field [0001] The invention relates to a transformer capable of reducing noise, in particular to a transformer core structure and a manufacturing method for reducing noise at gaps of transformer core laminations. Background technique [0002] The transformer core is made of overlapping silicon steel sheets. There is an air gap at the overlapping silicon steel sheets. Because the reluctance of the air gap is very large, when the magnetic flux passes through the air gap, it does not directly pass through the air gap, but flows from the adjacent silicon steel sheets. Detour, resulting in magnetic flux leakage, the existence of leakage magnetic field causes the increase of electromagnetic force between adjacent silicon steel sheets, aggravates the electromagnetic vibration between silicon steel sheets, the air gap at the joint of transformer core is the main cause of transformer no-load loss and vibration noise . [0003] In recent years, by using high-quality ferromag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/245H01F27/26H01F41/02
CPCH01F27/263H01F27/245H01F41/02
Inventor 张艳丽张一峰王振冯超李岱岩李梦星张殿海夏斌任自艳
Owner SHENYANG POLYTECHNIC UNIV
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