A polyaryletherketone / polyimide composite enameled wire and a preparation method thereof

The polyaryletherketone/polyimide composite enameled wire, prepared by a three-layer insulation structure and solution coating process, solves the problems of high voltage resistance, oil-water mixture resistance, and insufficient adhesion of high power density drive motor windings, and achieves the preparation of high-performance insulation and long-life enameled wire.

CN122177556APending Publication Date: 2026-06-09JIANGXI JIANGTONG-TAIYI SPECIAL ELECTRIC MATERIAL CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGXI JIANGTONG-TAIYI SPECIAL ELECTRIC MATERIAL CO LTD
Filing Date
2026-05-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing enameled wires for high power density drive motor windings have shortcomings in terms of high voltage resistance, heat dissipation from oil-water mixtures, and adhesion to copper conductors. In particular, polyimide has a high dielectric constant and poor hydrolysis resistance, while polyether ether ketone resin is difficult to dissolve and has a complex preparation process.

Method used

It adopts a three-layer insulation structure. The first layer is polyimide or polyamide-imide, which has good adhesion to copper conductors. The second layer is low dielectric constant polyimide, which provides basic insulation. The third layer is soluble polyaryletherketone, which provides multiple excellent properties. It is prepared by solution coating process and nanoparticles are added for modification to improve corona resistance.

Benefits of technology

It achieves high breakdown voltage, resistance to oil-water mixtures, excellent corona resistance, compatibility with traditional solution coating processes, reduced production costs, adaptability to high-voltage and high-frequency operating environments, good mechanical flexibility, and long service life.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122177556A_ABST
    Figure CN122177556A_ABST
Patent Text Reader

Abstract

The present application belongs to the technical field of enameled wire, and particularly relates to a polyaryletherketone / polyimide composite enameled wire and a preparation method thereof. The composite enameled wire comprises a copper conductor and a three-layer composite insulating layer covering the copper conductor. The first insulating layer connected with the copper conductor is polyimide or polyamide-imide, and has excellent adhesion. The second insulating layer is low-dielectric polyimide with a dielectric constant of less than 3.0, and has good insulating performance. The third insulating layer at the outermost layer is soluble polyaryletherketone containing a meta-structure and a strong polar structure. The present application also discloses a preparation method thereof. The composite enameled wire is prepared by a solution coating process, is compatible with traditional enameled wire production equipment, and does not need to be customized for a melt extrusion equipment. The composite enameled wire has high breakdown voltage, high partial discharge inception voltage, excellent hydrolysis resistance, corona resistance and chemical corrosion resistance, good mechanical flexibility, and good wear resistance and self-lubricating property, and is suitable for use in high-power density drive motors of 800 V and above, and high-voltage high-frequency use scenarios.
Need to check novelty before this filing date? Find Prior Art