A rotor core for a brushless motor, a rotor, and a brushless motor
By improving the structural design of the rotor core of the brushless motor and using magnetic bridges and blocking components to restrict the radial movement of the magnets, the problem of large magnetic leakage was solved, resulting in improved motor performance and reduced costs.
CN122292736APending Publication Date: 2026-06-26HANGZHOU HENGYE MOTOR MANUFACTURE CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HANGZHOU HENGYE MOTOR MANUFACTURE CO LTD
- Filing Date
- 2026-02-28
- Publication Date
- 2026-06-26
AI Technical Summary
Technical Problem
Existing brushless motor rotors have a large leakage flux, which leads to low utilization of permanent magnets and a decline in motor performance.
Method used
The design employs an annular yoke, iron core petals, and connectors. Air passages are formed through the first and second magnetic bridges to restrict radial movement of the magnets, reduce magnetic leakage circuits, and further reduce magnetic leakage by utilizing blocking components and stress relief grooves.
Benefits of technology
It effectively reduces magnetic leakage, improves motor performance, enhances structural strength, increases assembly efficiency, and reduces production costs.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122292736A_ABST
Abstract
This invention relates to a rotor core for a brushless motor, a rotor, and a brushless motor. The rotor core includes an annular yoke, multiple core segments, multiple first connectors, and multiple second connectors. The core segments are spaced circumferentially along the annular yoke, with a radial gap between each core segment and the annular yoke. Adjacent core segments form spaces to accommodate magnets, and the segments furthest from the annular yoke are connected by the first connectors. One adjacent core segment is connected to the annular yoke by a second connector. The second connector includes a first magnetic bridge and a second magnetic bridge. One end of each magnetic bridge is connected to a core segment, and the other end is connected to the annular yoke. The first magnetic bridge restricts the radial movement of one adjacent magnet, and the second magnetic bridge restricts the radial movement of the other magnet. The first magnetic bridge, the second magnetic bridge, and the annular yoke together form an air passage. This invention reduces magnetic leakage.
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