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Semi-hard state winding wire and manufacturing method thereof

A winding wire, semi-hard technology, applied in plastic/resin/wax insulators, organic insulators, conductors, etc., can solve the problems of poor application process, poor electrical performance of products, poor electrical conductivity, etc., to achieve good solvent resistance, Excellent insulation stability and good electrical conductivity

Pending Publication Date: 2018-10-02
SUZHOU GUANLONG MAGNET WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The hydro-generator is composed of a rotor and a stator. The stator does not rotate when the motor is running, but the rotor rotates without stopping in the working state. Usually, the speed of the hydro-generator is as low as 120 rpm, but for some special For high-speed hydro-generators, that is, hydro-generators with a speed exceeding 120 rpm, the centrifugal force generated during rotation is likely to deform the rotor winding product, thereby causing the motor to fail. Therefore, the strength of the material used for the rotor winding New requirements are put forward for rotor windings at higher than usual speeds
[0003] In the prior art, the annealed soft pure copper (TU2) flat wire is generally used as the conductor material, taking the annealed soft pure copper (TU2) flat wire with a wire gauge of 2.00mm×4.50mm as an example, the tensile strength is ≤255N / mm 2 , elongation at break ≥ 34%, volume resistivity ≤ 0.017241Ω·mm 2 / m, the wire is soft, and it will deform during long-term high-speed centrifugal rotation, which will affect the life of the motor
At the same time, hard pure copper (TU2) flat wire is used as the conductor material, which has poor application processability and poor electrical conductivity.
[0004] In the prior art, there is a semi-rigid wire assembly (CN 206532620U). The insulation structure is made of glass fiber, epoxy resin, and polyester impregnated varnish. The product has poor electrical performance and a breakdown voltage value of ≤600V

Method used

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  • Semi-hard state winding wire and manufacturing method thereof
  • Semi-hard state winding wire and manufacturing method thereof
  • Semi-hard state winding wire and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] a. Add 0.08wt% pure silver of the copper mass to the copper with a purity of 99.90% for smelting, and then draw it up into a soft copper rod;

[0072] b. Rolling the above soft copper rod;

[0073] c. The die is physically drawn to the blank size;

[0074] d. Copper wire winding;

[0075] e. Perform bright oxygen-free annealing on the coiled copper wire;

[0076] f. The mold is physically drawn to the final size to obtain a rectangular rectangular bare conductor 1. The thickness of the conductor 1 is 0.5mm, the width is 2mm, and the radius of the arc is 0.36mm;

[0077] g. Use ultrasonic cleaning to blow dry the obtained rectangular rectangular wire bare conductor 1 to prepare for subsequent insulation coating work;

[0078] h. Use a paint scraping mold to coat the polyamide-imide insulating varnish on the rectangular rectangular wire bare conductor 1 to form a coating;

[0079] i. Oven radiation drying;

[0080] Steps h and i are repeated 10 times to make the thickness of the polyam...

Embodiment 2

[0085] a. Add 0.10wt% pure silver of the copper mass to the red copper with a purity of 99.90% for smelting, and then draw it up into a soft copper rod;

[0086] b. Rolling the above soft copper rod;

[0087] c. The die is physically drawn to the blank size;

[0088] d. Copper wire winding;

[0089] e. Perform bright oxygen-free annealing on the coiled copper wire;

[0090] f. The mold is physically drawn to the final size to obtain a rectangular rectangular wire bare conductor 1. The thickness of the conductor 1 is 2.0mm, the width is 5mm, and the radius of the arc is 0.81mm;

[0091] g. The obtained rectangular rectangular wire bare conductor 1 is cleaned and dried by ultrasonic to prepare for the subsequent insulation coating work;

[0092] h. Use a paint scraper to coat the polyamide-imide insulating varnish on the rectangular rectangular wire bare conductor 1 to form a coating;

[0093] i. Oven radiation drying;

[0094] Steps h and i are repeated 10 times to make the thickness of the ...

Embodiment 3

[0099] a. Add 0.12wt% pure silver of the copper mass to the red copper with a purity of 99.90% for smelting, and then draw it up into a soft copper rod;

[0100] b. Rolling the above soft copper rod;

[0101] c. The die is physically drawn to the blank size;

[0102] d. Copper wire winding;

[0103] e. Perform bright oxygen-free annealing on the coiled copper wire;

[0104] f. The mold is physically drawn to the final size to obtain a rectangular rectangular bare conductor 1. The thickness of the conductor 1 is 3.5mm, the width is 8mm, and the radius of the arc is 1.25mm;

[0105] g. The obtained rectangular rectangular wire bare conductor 1 is cleaned and dried by ultrasonic to prepare for the subsequent insulation coating work;

[0106] h. Use a paint scraping mold to coat the polyamide-imide insulating varnish on the rectangular rectangular wire bare conductor 1 to form a coating;

[0107] i. Oven radiation drying;

[0108] Steps h and i are repeated 10 times to make the thickness of the...

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Abstract

The invention discloses a semi-hard state winding wire, which sequentially comprises a conductor, a first insulation layer and a second insulation layer from inside to outside, wherein the first insulation layer adopts a polyamide-imide coating; the second insulation layer adopts mixed fiber formed by polyester fiber and glass fiber through laying to be wrapped on the first insulation layer, pre-heating is firstly carried out, baking is then carried out to enable the polyester fiber to be melted to liquid, the liquid fills pores and the gap of the glass fiber, the mixed fiber forms a non-loosecompact structure and is well attached outside the polyamide-imide coating, and thus, the electrical properties of a product are not influenced even if the product is subjected to friction and knocking. The thickness of a product insulation layer is 0.18 mm to 0.22 mm, and an inorganic content is 22% to 32%. According to the semi-hard state winding wire obtained in the above method, 4a and 4b bending insulation without cracking are achieved, the bending breakdown voltage is no smaller than 1300 V, the linear breakdown voltage is no smaller than 2500V, the insulation layer with 20% stretchingdoes not lose adhesion, 30 min heating in an oven of 180 DEG C and taking out to cool to room temperature for 6a and 6b bending are carried out, the insulation layer does not crack, the insulation stability is excellent, and the conductivity is no smaller than 100%IACS.

Description

Technical field [0001] The invention belongs to the technical field of generator accessories, and particularly relates to a semi-hard winding wire and a preparation method thereof. Background technique [0002] The water turbine generator is composed of a rotor and a stator. The stator does not rotate when the motor is running, but the rotor does not stop rotating in the working state. Generally, the rotation speed of the water turbine generator is about 120 revolutions per minute. The high-speed hydraulic generator, that is, the hydraulic generator with a speed exceeding 120 rpm, the centrifugal force generated during rotation is easy to deform the rotor winding product, which causes the motor to malfunction. Therefore, the strength of the material used in the rotor winding The above-mentioned rotor windings at a more usual speed put forward new requirements. [0003] In the prior art, generally annealed soft pure copper (TU2) rectangular wire is used as the conductor material. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/18H01B7/02H01B3/38
CPCH01B3/38H01B7/0258H01B7/1875H01B7/1895
Inventor 郑一帆顾新梅
Owner SUZHOU GUANLONG MAGNET WIRE
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