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Amorphous magnetic shielding board for transformer and processing method thereof

A processing method and magnetic shielding technology, applied in the fields of magnetic field/electric field shielding, preventing/reducing unwanted electric/magnetic effects, electrical components, etc., can solve the problems of heavy weight, large thickness of shielding plate, high production cost, etc., to achieve Reduce eddy current loss and line loss, good magnetic permeability, light weight effect

Inactive Publication Date: 2010-09-22
江苏华晖磁性材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current shielding plate is usually made of silicon steel sheet. Since the magnetic permeability of the silicon steel sheet is low, in order to obtain a better magnetic shielding effect, the thickness of the shielding plate is very large, resulting in a bulky transformer, heavy weight, and high production costs. High, and the magnetic shielding effect is not ideal, the eddy current loss accounts for 30-50% of the transformer power

Method used

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  • Amorphous magnetic shielding board for transformer and processing method thereof
  • Amorphous magnetic shielding board for transformer and processing method thereof
  • Amorphous magnetic shielding board for transformer and processing method thereof

Examples

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Embodiment 1

[0022] Embodiment 1: Take the application of the amorphous magnetic shielding plate of the present invention in the SFSZ10-150000 / 220 type oil-immersed transformer as an example.

[0023] The amorphous magnetic shielding plate described in this embodiment includes an amorphous magnetic plate 1 and an insulating cardboard 2, and 220 amorphous magnetic plates 1 made of 3605A-1 type amorphous strips are stacked sequentially in front and back It is placed into an amorphous laminate, and after the amorphous laminate is annealed and solidified, the insulating paperboard 2 is wrapped on the above-mentioned amorphous laminate. The insulating cardboard 2 is 1.0110 / 00 type, its thickness is 1mm, and its density is 1.0~1.2g / cm 3 , the tensile strength is 90MPa, and the electric strength is ≥3.5KV / mm. The width x length x thickness of the amorphous magnetic shielding plate = 213 x 2050 x 6 mm.

[0024] The processing method of the amorphous magnetic shielding plate described in the embo...

Embodiment 2

[0031] Embodiment 2: Take the application of the amorphous magnetic shielding plate of the present invention in the SSZ-50000 / 110 type oil-immersed transformer as an example.

[0032] The amorphous magnetic shielding plate described in this embodiment includes an amorphous magnetic plate 1 and an insulating cardboard 2; the amorphous magnetic plate is cut from a 3605A-1 type amorphous strip, and several An assembly hole 3 corresponding to the transformer; 220 pieces of amorphous magnetic plates 1 are stacked in sequence in front and back to form amorphous laminates. After the amorphous laminates are annealed and cured, insulating cardboard 2 is coated on the above amorphous Outside the crystal stack. The insulating cardboard 1 is 1.0110 / 00 type, its thickness is 1mm, and its density is 1.0~1.2g / cm 3 , the tensile strength is 90MPa, and the electric strength is ≥3.5KV / mm. The width x length x thickness of the amorphous magnetic shielding plate = 213 x 1640 x 6 mm.

[0033] T...

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Abstract

The invention provides an amorphous magnetic shielding board for a transformer and a processing method thereof. The processing method comprises the following steps of: cutting an amorphous strip into amorphous magnetic boards in a needed size; then, sequentially overlapping several amorphous magnetic boards in a positive and negative opposition mode into an amorphous overlapping sheet and fixing the amorphous overlapping sheet with a clamp; and after annealing and curing the amorphous overlapping sheet in vacuum, coating the periphery of the amorphous overlapping sheet with an insulated paper board to form an amorphous magnetic shielding board. The amorphous magnetic shielding board made of amorphous magnetic material has the advantages of favorable magnetism-conducting performance, small size and light weight, can effectively reduce the vortex loss and the circuit loss of a transformer and can save energy approximate 25 percent.

Description

technical field [0001] The invention relates to a magnetic shielding plate for a transformer and a processing method thereof, in particular to an amorphous magnetic shielding plate for a transformer and a processing method thereof. Background technique [0002] Transformers, especially large-scale high-voltage transformers, will generate huge eddy current losses during their operation, which will increase the losses in the entire transformer circuit. In order to reduce the eddy current loss of the transformer, shielding plates are usually installed on the inner wall of the transformer box corresponding to the high-voltage coil to absorb the leakage magnetic flux. The current shielding plate is usually made of silicon steel sheet. Since the magnetic permeability of the silicon steel sheet is low, in order to obtain a better magnetic shielding effect, the thickness of the shielding plate is very large, resulting in a bulky transformer, heavy weight, and high production costs. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/36H05K9/00
Inventor 毛雪明
Owner 江苏华晖磁性材料有限公司
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