Fabrication method for transformer silicon steel sheet

A technology of silicon steel sheets and transformers, which is applied in the field of transformers, can solve the problems of high manufacturing cost, limit the performance and service life of transformers, and control insufficient hysteresis loss, achieve stable mechanical properties, improve service life and performance, and be easy to implement Effect

Inactive Publication Date: 2015-11-11
ANHUI GUANGZHENG ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the silicon steel sheet has the function of controlling and reducing the iron loss, there are still deficiencies in controlling the hysteresis loss, and the preparation cost is high, which limits the performance and service life of the transformer to a certain extent. Therefore, the performance of the transformer iron core remains to be promote

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a transformer silicon steel sheet, the preparation method comprising the steps of:

[0025] 1) Select silicon steel sheet raw material, silicon steel sheet wherein silicon content is 18%,

[0026] 2) Stamping forming, using a stamping machine to stamp the silicon steel sheet into EI type, UI type or C type;

[0027] 3) overall annealing, using an annealing furnace to anneal;

[0028] 4) Insulation treatment, put the silicon steel sheet into a mixing bucket, pour in insulating varnish with a mass percentage of 2%, and stir evenly for 45 minutes; then dry the processed silicon steel sheet in an oven at 80°C for a treatment time of 40 minute;

[0029] 5) Prepare the treatment solution, its percentage ratio is: magnesium oxide 12%, auxiliary agent 5%, and the rest is solvent. First, add magnesium oxide and solvent to the reaction kettle according to the ratio, stir evenly for 25 minutes, and react The temperature of the reactor is controlled at 45...

Embodiment 2

[0037] A preparation method of a transformer silicon steel sheet, the preparation method comprising the steps of:

[0038] 1) Choose silicon steel sheet raw material, silicon steel sheet wherein silicon content is 15%,

[0039] 2) Stamping forming, using a stamping machine to stamp the silicon steel sheet into EI type, UI type or C type;

[0040] 3) overall annealing, using an annealing furnace to anneal;

[0041] 4) Insulation treatment, put the silicon steel sheet into the mixing bucket, pour in the insulating varnish with a mass percentage of about 1%, and stir evenly for 40 minutes; then dry the processed silicon steel sheet in an oven at 75°C, and the processing time is about 35 minutes;

[0042] 5) Prepare the treatment solution, the percentage ratio of which is: 10% magnesium oxide, 3% auxiliary agent, and the rest is solvent. First, add magnesium oxide and solvent to the reaction kettle according to the ratio, stir evenly for 20 minutes, and react The temperature of...

Embodiment 3

[0050] A preparation method of a transformer silicon steel sheet, the preparation method comprising the steps of:

[0051] 1) Select silicon steel sheet raw material, silicon steel sheet wherein silicon content is 17%,

[0052] 2) Stamping forming, using a stamping machine to stamp the silicon steel sheet into EI type, UI type or C type;

[0053] 3) overall annealing, using an annealing furnace to anneal;

[0054] 4) Insulation treatment, put the silicon steel sheet into a mixing bucket, pour in insulating varnish with a mass percentage of 1.5%, and stir evenly for 42 minutes; then dry the processed silicon steel sheet in an oven at 78°C for 38 minute;

[0055] 5) Prepare the treatment solution, its percentage ratio is: magnesium oxide 11%, auxiliary agent 4%, and the rest is solvent. First, add magnesium oxide and solvent to the reaction kettle according to the ratio, stir evenly for 23 minutes, and react The temperature of the reactor is controlled at 42°C; then, add additi...

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PUM

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Abstract

The invention discloses a fabrication method for a transformer silicon steel sheet. The fabrication method comprises the following steps of: 1) selecting a silicon steel sheet raw material; 2) carrying out punching and forming; 3) carrying out integral annealing; 4) carrying out insulation treatment; 5) preparing a treating fluid; and 6) performing membrane coating. The fabrication method disclosed by the invention has the advantages of reasonable process arrangement, convenience in implementation and moderate cost, and the mechanical property of an iron core is stable.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a method for preparing a transformer silicon steel sheet. Background technique [0002] The transformer is made according to the principle of electromagnetic induction. There are two windings on the closed iron core, one is the primary winding and the other is the secondary winding. During the working process of the transformer, its power loss occurs not only in the resistance of the coil, but also in the iron core magnetized by the alternating current. People usually refer to the power loss in the iron core as "iron loss", and the causes of iron loss are mainly divided into hysteresis loss and eddy current loss. The hysteresis loss is the energy loss caused by the hysteresis phenomenon in the magnetization process of the iron core material, while the eddy current loss is generated in the plane perpendicular to the direction of the magnetic flux, and the energy lost is converted into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02
Inventor 周浩张兵
Owner ANHUI GUANGZHENG ELECTRICAL TECH
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