Rotor assembly and servo motor

By designing the rotor body and inertia section in the rotor assembly and using the air reluctance region to limit magnetic field line leakage, the axial magnetic leakage problem caused by inertia adjustment in servo motors is solved, thereby improving motor performance and production efficiency.

CN122159541APending Publication Date: 2026-06-05GUANDONG MEDIA INTELLIGENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANDONG MEDIA INTELLIGENT TECH CO LTD
Filing Date
2024-11-29
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In the field of servo motors, adjusting the inertia by changing the axial length of the rotor core may cause serious axial leakage magnetic field problems, reducing motor performance.

Method used

A rotor assembly is designed to form a rotor body and an inertia section by setting a first rotor lamination and a second rotor lamination on the rotor lamination. An air magnetic reluctance region is formed by utilizing the edge of the first slot located outside the magnet slot to limit the leakage path of the magnetic field lines. The rotor body and the inertia section are formed by a single stacking, simplifying the manufacturing process.

Benefits of technology

It effectively decouples electromagnetic fields and rotational inertia, reduces the risk of end magnetic leakage, improves motor performance and production efficiency, simplifies manufacturing processes, and enhances the rigidity and stability of rotor components.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN122159541A_ABST
    Figure CN122159541A_ABST
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Abstract

The application discloses a rotor assembly and a servo motor, wherein the rotor assembly comprises a first rotor lamination, a second rotor lamination and a magnetic steel, the first rotor lamination comprises a plurality of first sector parts, and a magnetic steel slot is formed between two adjacent first sector parts; the second rotor lamination comprises a plurality of second sector parts, the second sector parts are arranged in correspondence with the first sector parts in the axial direction, a first slot is formed between two adjacent second sector parts, the first slot is in communication with the magnetic steel slot in the axial direction, and the first slot completely covers the magnetic steel slot in the projection area of the first rotor lamination. In the application, the plurality of second rotor laminations are stacked to form an inertia part so as to adjust the rotational inertia, the edge of the first slot is located at the periphery of the edge of the magnetic steel slot, an air magnetic resistance area is formed between the edge of the first slot and the edge of the magnetic steel slot, so as to limit the leakage path of the magnetic field lines and reduce the risk of end leakage; the rotor body part and the inertia part can be formed by one-time lamination, which is beneficial to simplifying the manufacturing process and improving the production efficiency.
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