Rotor assembly and motor with same

By designing axially penetrating receiving slots on the rotor core and alternately distributing permanent magnets in the main body and reduced portion, the leakage magnetic field problem of the built-in tangential rotor structure was solved, achieving improved magnetic performance and efficient utilization of materials.

CN121966077APending Publication Date: 2026-05-01GREE ELECTRIC APPLIANCE INC OF ZHUHAI
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Patent Information

Application Number
CN202512011865.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-29
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

The built-in tangential rotor structure is prone to magnetic leakage, resulting in low magnet utilization and wasted manufacturing costs.

Method used

Design a rotor assembly in which a first receiving groove is provided on the rotor core through the axial direction, and a first permanent magnet includes a main body part and a reduced part. The main body part is close to the outer circle of the rotor core, and the reduced part is close to the center. The leakage magnetic flux is reduced and the magnetic flux is increased by the alternating distribution of the first and second permanent magnets.

Benefits of technology

It effectively reduces magnetic leakage, improves magnetic performance, reduces waste of magnetic materials, and ensures the magnetic performance and overall magnetic flux of the rotor assembly.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention provides a rotor assembly and a motor with the same, the rotor assembly comprises a rotor iron core and a first permanent magnet, a first accommodating groove penetrating through the axial direction of the rotor iron core is formed in the rotor iron core, the first accommodating groove extends along the radial direction of the rotor iron core, and the first permanent magnet is inserted into the first accommodating groove. The first permanent magnet comprises a main body part and a reduction part formed on one side of the main body part, the size of the reduction part is smaller than that of the main body part, the main body part is close to the outer circle of the rotor core relative to the reduction part, and the reduction part is located at the center of the rotor core relative to the main body part. According to the invention, the main body part with a larger volume is closer to the outer circle of the rotor core, the reduced part with a smaller volume is closer to the center of the rotor core, and the area close to the center of the rotor core is the easily-magnetic-leakage part of the rotor, namely, the main body part of the first permanent magnet avoids the easily-magnetic-leakage part of the rotor, so that magnetic leakage can be reduced; the magnetic performance of the rotor is ensured.
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