Motor rotor magnetic adhesive for improving high-temperature magnetic flux, and motor rotor

By adding a specific proportion of non-magnetic fillers and magnetic powder to the motor rotor adhesive, a multi-scale filling structure is formed, which solves the problem of increasing magnetic flux at high temperatures and achieves performance improvement of the motor rotor in high-temperature environments.

WO2026123595A1 Publication Date: 2026-06-18HENKEL HUAWEI ELECTRONICS
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HENKEL HUAWEI ELECTRONICS
Filing Date
2025-05-20
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing motor rotor fixing materials are difficult to increase magnetic flux in high-temperature environments, especially when used in new energy vehicles. Current technologies cannot effectively increase rotor magnetic flux, which affects motor performance.

⚗Method used

A magnetic adhesive for motor rotors that improves high-temperature magnetic flux is employed. This is achieved by adding a specific proportion of molten spherical silica, molten angular silica, fumed silica, and magnetic powder to epoxy resin, along with boron nitride nanosheets, to form a multi-scale filled structure. This improves the tight packing and interfacial bonding of the magnetic powder, thereby enhancing the magnetic flux.

🎯Benefits of technology

It significantly improves the magnetic flux and magnetic induction performance of motor rotors in high-temperature environments, while maintaining good mechanical strength and toughness, expanding the application range of epoxy resin fixed rotors and making them suitable for high-speed environments.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to the field of motor adhesives, and in particular relates to a motor rotor magnetic adhesive for improving high-temperature magnetic flux, and a motor rotor. The motor rotor magnetic adhesive comprises the following raw materials, in parts by mass: 5-15 parts of an epoxy resin, 1-3 parts of a phenolic resin, 0.5-2 parts of a curing accelerator, 15-30 parts of fused spherical silica, 40-60 parts of fused angular silica, 4-10 parts of fumed silica, 1-3 parts of a silane coupling agent, and 5-30 parts of magnetic powder, wherein the D50 of the fused spherical silica is 5-9 μm, the D50 of the fused angular silica is 15-21 μm, and the specific surface area of the fumed silica is 230-280 m2 / g. In the present invention, magnetic material powder is used as a part of a solid filler, in combination with a silica filler having a specific size, which powder improves the high-temperature magnetic flux of the overall material and also maintains good mechanical strength.
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