Polyamide-imide finish for corona-resistant enameled wire

A technology of polyamide-imide surface and enameled wire, which is applied in the direction of circuits, electrical components, insulated cables, etc., can solve the problems of increasing coating thickness, high cost of equipment transformation, high power density, etc., and achieves flexibility and wear resistance Good, good corona resistance performance, long-term impact resistance

Active Publication Date: 2015-07-15
TONGLING JINGDA SPECIAL MAGNET WIRE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coating a layer of self-lubricating paint on the outside of the anti-corona enameled wire can reduce the friction coefficient of the anti-corona enameled wire, but it is necessary to add another set of self-lubricating paint coating device to become a four-coat enameled wire, and the cost of equipment transformation is huge. It will inevitably increase the thickness of the coating, and it will inevitably reduce the thickness of the anti-corona coating under the premise of keeping the entire wire diameter unchanged, so that the total amount of anti-corona particles in the coating will decrease, and the anti-corona effect will decrease, so it cannot be applied to Where high corona resistance is required
For example, as the core component of new energy vehicles, the driving motor of new energy vehicles has high torque and high power density. technology requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The polyamide-imide topcoat is based on 100 parts by total weight, including: 1 part of lubricating and wear-resistant component, 3 parts of solvent, and 96 parts of base paint.

[0018] The lubricating and wear-resistant ingredients are based on 100 parts by total weight, including 30 parts of molybdenum disulfide, 30 parts of sepiolite powder, 15 parts of polytetrafluoroethylene, 15 parts of polyethylene wax, and 10 parts of silicone oil.

[0019] The solvent is calculated by weight ratio, N-methylpyrrolidone:xylene=1:1.

Embodiment 2

[0021] The polyamide-imide topcoat is based on 100 parts by total weight, including: 3 parts of lubricating and wear-resistant components, 7 parts of solvent, and 90 parts of base paint.

[0022] The lubricating and wear-resistant ingredients are based on 100 parts by total weight, including 20 parts of molybdenum disulfide, 30 parts of sepiolite powder, 20 parts of polytetrafluoroethylene, 25 parts of polyethylene wax, and 5 parts of silicone oil.

[0023] The solvent is calculated by weight ratio, N-methylpyrrolidone:xylene=1.5:1.

Embodiment 3

[0025] The polyamide-imide topcoat includes 7 parts of lubricating and wear-resistant components, 3 parts of solvent and 90 parts of base paint based on 100 parts by total weight.

[0026] The lubricating and wear-resistant ingredients are based on 100 parts by total weight, including 20 parts of molybdenum disulfide, 20 parts of sepiolite powder, 25 parts of polytetrafluoroethylene, 20 parts of polyethylene wax, and 15 parts of silicone oil.

[0027] The solvent is calculated by weight ratio, N-methylpyrrolidone:xylene=2:1.

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Abstract

The invention discloses polyamide-imide finish for a corona-resistant enameled wire. The polyamide-imide finish comprises, in terms of the total weight accounting for 100 parts, components as follows: 1-10 parts of a lubricating abrasion-resistant component, 1-10 parts of a solvent and the balance of base paint, wherein the lubricating abrasion-resistant component is a mixture of molybdenum disulfide, sepiolite powder, polytetrafluoroethylene, polyethylene wax and silicone oil in the ratio of (20-30):(20-30):(15-25):(15-25):(5-15) in terms of the total weight accounting for 100 parts; the solvent is a mixture of N-methylpyrrolidone and xylene in the weight ratio of (1-2):1; the base paint is polyamide-imide paint. The polyamide-imide finish can decrease the static friction coefficient of the corona-resistant enameled wire, is good in improvement effect on the corona resistance of the corona-resistant enameled wire and is applicable to driving motors of new-energy vehicles.

Description

technical field [0001] The invention belongs to the technical field of enameled wire manufacture, and in particular relates to a polyamide-imide topcoat which can be used for the external coating of multi-coat composite anti-corona enameled wire. Background technique [0002] At present, due to the high heat resistance and corona resistance characteristics of anti-corona enameled wire, it is widely used in the fields of industrial frequency conversion motors and automobile drive motors. For the structure of anti-corona enameled wire, please refer to the paper "Development and Mechanism of Anti-corona Enameled Wire" published by the author Luo Xin in the second issue of "Copper Industry Engineering" in 2012: the outer insulation layer of the conductor of the anti-corona enameled wire is usually Coated with three layers of insulating coating. Polyesterimide coatings are usually used for the inner coating, anti-corona coatings are used for the middle coating, and polyamideimid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/44H01B7/17H01B13/22
Inventor 苏保信秦兵郑守国周固策李学正吴克平
Owner TONGLING JINGDA SPECIAL MAGNET WIRE CO LTD
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