Rotor
By setting protrusions and concave parts in the magnet insertion hole, the stress concentration problem in the magnet insertion hole is solved, thereby improving the stability of the magnet and the performance of the rotor.
CN122178609APending Publication Date: 2026-06-09TOYOTA JIDOSHA KK
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Patent Information
- Application Number
- CN202511385955.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-12-06
- Filing Date
- 2025-09-26
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
During rotor manufacturing and rotation, stress tends to concentrate at specific locations in the magnet insertion hole, leading to magnet deformation or damage.
Method used
A protrusion and a concave portion are provided in the magnet insertion hole. The protrusion is close to or abuts against the magnet and protrudes outward in the radial direction. The concave portion is recessed inward in the radial direction on the second magnet side of the protrusion. Stress concentration is relieved by allowing the protrusion to deform.
Benefits of technology
It effectively suppresses stress concentration in the magnet insertion hole, prevents magnet deformation and damage, and improves rotor durability and maximum speed.
✦ Generated by Eureka AI based on patent content.
Abstract
The rotor includes: a rotor core having a plurality of pairs of magnet insertion holes in an outer peripheral portion; a first magnet inserted into at least one magnet insertion hole of the pair of magnet insertion holes in a radially outward extending direction closest to the radially inward side of the rotor core; and a second magnet inserted to the outside in the radial direction so as to be separated from the first magnet. The at least one magnet insertion hole is provided, on an inner wall of a gap between the first magnet and the second magnet, with respect to an inner side in a radial direction of the rotor core, with: a protruding portion that abuts against or approaches the first magnet, protrudes outward in the radial direction, and holds the first magnet; and a recessed portion that is recessed inward in the radial direction.
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