Fiber interlayer transformer iron core and stacking method thereof

A technology of transformers and interlayers, applied in the direction of transformer/inductor magnetic core, transformer/inductor parts, electrical components, etc., can solve the problems of electromagnetic vibration noise of iron core, intensified bending vibration of iron core, increase of radiation noise, etc. Insulating properties, reducing interlayer friction, reducing wear effects

Active Publication Date: 2016-04-13
WUXI PUTIAN IRON CORE CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the uneven distribution of magnetic flux density in the transformer laminated core, local flux distortion and temperature changes will cause the laminated core to be subjected to a random and non-uniform local pressure, which will affect the electromagnetic vibration noise of the overall core
When the clamping force of the iron core is not large enough, the flatness of the silicon steel sheet or the self-weight factor will cause the iron core to bend and deform, resulting in the intensification of the bending vibration of the iron core and the increase of radiation noise

Method used

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  • Fiber interlayer transformer iron core and stacking method thereof
  • Fiber interlayer transformer iron core and stacking method thereof
  • Fiber interlayer transformer iron core and stacking method thereof

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the drawings.

[0033] See figure 1 , A fiber sandwich transformer core, usually there are 5 levels on both sides of the main stage 3, each level contains a number of silicon steel sheet laminates 2, and a fiber interlayer 1 is arranged between adjacent silicon steel sheet laminates 2.

[0034] The thickness of the fiber interlayer 1 is 0.3 mm, 0.38 mm or 0.5 mm; the material of the fiber interlayer 1 is nylon, nylon, glass fiber, etc., and the mesh size of nylon, nylon, and glass fiber is 30 mesh to 60 mesh.

[0035] The thickness of the fiber interlayer is 1 to 1.2 times the thickness of the silicon steel sheet.

[0036] The grain direction of the fiber interlayer is 45 degrees with the rolling direction of the silicon steel sheet.

[0037] See figure 2 , A method for stacking fiber sandwich transformer cores, through the stacking process of silicon steel sheets, a fiber sandwich is arranged between ea...

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Abstract

The invention provides a fiber interlayer transformer iron core and a stacking method thereof. The method includes the steps of putting an insulating piece on a main clamping piece and a clamping iron plate, determining the installation positions of a core column of iron core stacking layers, inserting a positioning pin in a core penetrating hole in a stacking mode at the installation position at the minimum stage, completing stacking of all stages from bottom to top, and adding a fiber interlayer between every two adjacent stages; detaching the positioning pin after completing stacking, and putting the insulating piece; inserting a fastening screw in the core penetrating hole, assembling the main clamping piece through a yoke penetrating screw and an epoxy resin lashing band, and obtaining the fiber interlayer transformer iron core. The abrasion to a silicon steel sheet insulating coating is reduced; meanwhile, the distribution of pressure stress generated by iron core stacking can be improved, the damping performance of an iron core under miniature vibration is improved, and the problems of iron core bending vibration and radiation noise caused by magnetostriction of a silicon steel sheet can be effectively solved; meanwhile, due to the reasonable distribution of the fiber interlayers, the insulating performance between the interlayers can be improved, and the loss between every two adjacent iron core layer stages is reduced.

Description

Technical field [0001] The invention belongs to the field of electrical equipment, and specifically relates to a fiber sandwich core and a stacking method thereof. Background technique [0002] The iron core is the main magnetic circuit part of the transformer. In order to reduce the eddy current loss caused by the variable magnetic flux in the iron core, it is usually made of hot-rolled or cold-rolled silicon steel with a high silicon content and an insulating paint on the surface with a thickness of 0.27~0.35mm. It is an electromagnetic component of a power transformer. The iron core and the coil on it form a complete electromagnetic induction system, which can go deep into the load center. [0003] However, the silicon steel sheet undergoes magnetostriction (extends parallel to the magnetization direction and shrinks perpendicular to the magnetization direction) under the working magnetization state, which causes vibration of the laminated core. The magnetostriction of silicon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/26H01F27/245
CPCH01F27/245H01F27/26
Inventor 王小鹏陈天宁王金元
Owner WUXI PUTIAN IRON CORE CO LTD
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