Insulated wire, method for manufacturing same, coil, and electronic device

By using an insulating layer composed of liquid crystal polyester and polymer, the problem of local discharge of insulated wires under high voltage and tight space of miniaturization equipment is solved, and the insulated wire with high coating properties and high flexibility is achieved, and the service life of the insulating film is extended.

CN119724695APending Publication Date: 2025-03-28CHI MEI CORP
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Patent Information

Application Number
CN202411336608.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-09-27
Filing Date
2024-09-24
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

When using insulated wires at high voltages, partial discharge is prone to occur on the surface of the insulating film, resulting in deterioration of the insulating film. In a miniaturized and highly output rotary motor, the insulated wires need to have high coating properties and high flexibility to meet compact space requirements.

Method used

Using an insulating layer composed of liquid crystal polyester (A) and polymer (B), the liquid crystal polyester (A) is prepared by reacting aromatic hydroxycarboxylic acid, aromatic dicarboxylic acid, aromatic amine with phenolic hydroxyl groups and aromatic diol. The polymer (B) includes a polyimide precursor and its imidized polymer, and insulated wires are formed by coating and heating steps.

Benefits of technology

It realizes high coating and flexibility of insulated wires, reduces local discharge, extends the service life of the insulating film, and adapts to the space requirements in miniaturized and high output equipment.

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Abstract

The invention provides an insulated wire, a method for manufacturing the insulated wire, and a coil and an electronic device using the insulated wire. The insulated wire includes a conductor and an insulating layer laminated on an outer peripheral side of the conductor. The insulating layer includes a liquid crystal polyester (A) and a polymer (B). The liquid crystal polyester (A) is obtained by reacting a first mixture, and the first mixture comprises an aromatic hydroxycarboxylic acid (a1), an aromatic dicarboxylic acid (a2), an aromatic amine (a3) having a phenolic hydroxyl group, and an aromatic diol (a4). The polymer (B) is selected from at least one of a group consisting of a polyimide precursor and an imidized polymer of the polyimide precursor, and the polymer (B) includes an ester group structure. Therefore, the insulated wire can have good coating property and flexibility.
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