Transformer coil film wrapping and sintering process

A transformer coil and thin film technology, which is applied in coil manufacturing, conductor/cable insulation, electrical components, etc., can solve problems such as inability to sinter and deposit, poor insulation performance, and easy cracking, so as to improve insulation and stability, improve Adhesion, the effect of preventing cracking

Inactive Publication Date: 2013-11-27
ANHUI KELIN ELECTRONICS
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AI-Extracted Technical Summary

Problems solved by technology

[0002] Electromagnetic wire is the basic material industry for motors, electrical appliances, point addition, electronic information, communications and other industries. The electromagnetic wire is mainly enameled wire. The enameled wire is prone to pinholes, narrow edges, uneven coating, and bending during processing. Easy to crack...
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Method used

[0018] Specifically, the burr on the surface wall of the copper wire is mainly removed by mechanical processing, and the surfa...
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Abstract

The invention discloses a transformer coil film wrapping and sintering process, comprising the following steps of: removing an oxidation layer on the surface of a copper wire; polishing the outer wall of the copper wire; winding a polyimide wrapping belt on the surface of the copper wire; and enabling the copper wire to pass through a high-frequency spiral induction coil and heat, and controlling a difference value between an instant temperature of the copper wire and a temperature threshold to be within a certain range when the instant temperature of the copper wire reaches the preset temperature threshold. In the transformer coil film wrapping and sintering process, the film can be fully wrapped and evenly sintered and deposited on the copper wire, the adhesiveness of the film wrapping is increased, the coil is prevented from generating a cracking phenomenon when the coil is wound, thereby effectively improving the insulativity and stability of the film wire.

Application Domain

Coils manufactureInsulating conductors/cables

Technology Topic

Copper wirePolyimide +4

Examples

  • Experimental program(1)

Example Embodiment

[0015] S1, removing the oxide layer on the surface of the copper wire.
[0016] Specifically, the oxide layer on the surface of the copper wire can be removed by mechanical processing, or the oxide layer on the surface of the copper wire can be removed by soaking and dissolving in a chemical solvent. The adhesion between the oxide layer and the copper body is not enough. Early removal will affect the bonding force between the subsequent outer cladding and the copper body.
[0017] S2, polishing the outer wall of the copper wire.
[0018] Specifically, the burr on the surface wall of the copper wire is mainly removed by means of mechanical processing, and the surface of the copper body is smoothed, thereby increasing the bonding force between the outer cladding layer and the copper body.
[0019] S3, wrapping a polyimide tape on the surface of the copper wire.
[0020] Specifically, the polyimide tape is evenly wound on the surface of the copper wire.
[0021] S4. Make the copper wire pass along the axial direction of the high-frequency helical induction coil and generate heat at a speed of 6-8m/min. When the instant temperature of the copper wire reaches a predetermined temperature threshold, control the The difference between the instant temperature of the copper wire and the temperature threshold is within a certain range, preferably, the instant temperature of the copper wire is equal to the temperature threshold, and the temperature threshold is conducive to the uniform welding of the polyimide tape To the surface wall of the copper wire, the temperature threshold is 350-380°C.
[0022] Specifically, a high-frequency current is passed through the high-frequency spiral induction coil, the copper wire passes through it to generate heat, and several temperature measuring points are set on the copper wire.
[0023] When the instant temperature of the temperature measuring point is lower than the temperature threshold, the current through the spiral induction coil is increased, so that the instant temperature of the temperature measuring point continues to rise, thereby approaching the temperature threshold; when the instant temperature of the temperature measuring point is equal to When the temperature threshold is reached, the current passing through the spiral induction coil remains constant, so that the instant temperature of the temperature measurement point remains unchanged; when the instant temperature of the temperature measurement point is higher than the temperature threshold, the current passing through the spiral induction coil The current decreases, so that the instant temperature of the temperature measurement point decreases, thus approaching the temperature threshold. Therefore, the difference between the instant temperature of the copper wire and the temperature threshold is controlled within a certain range.
[0024] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

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