Iron core, stator, and rotating electric machine
By incorporating recesses and inclined convex sections in the core of the axially spaced rotary motor, the problem of insufficient tooth-to-yoke ratio is solved, achieving high density and high productivity, and improving the magnetic characteristics and productivity of the rotary motor.
CN121566802APending Publication Date: 2026-02-24SUMITOMO ELECTRIC INDUSTRIES LTD +1
1 Cites 0 Cited by
Patent Information
- Application Number
- CN202511797563.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2018-12-18
- Filing Date
- 2019-12-13
- Publication Date
- 2026-02-24
AI Technical Summary
Technical Problem
The ratio of teeth to yoke in the core of existing axial gap type rotary motors is not large enough, resulting in insufficient productivity and magnetic properties, and the manufacturing method has not been fully studied.
Method used
The one-piece molded powder body uses a recess between the yoke and the teeth to limit the shortest distance to less than or equal to 4mm, and an inclined protrusion is designed on the punch to reduce the risk of punch deformation and increase molding pressure to achieve high density and high productivity.
Benefits of technology
This achieves high core density and high productivity, ensures smooth magnetic flux passage, reduces the risk of punch damage, and improves the magnetic characteristics and productivity of the rotating motor.
✦ Generated by Eureka AI based on patent content.
Abstract
An iron core used in an axial gap type rotating electric machine, the iron core comprising: an annular plate-shaped yoke part; and a plurality of columnar tooth portions disposed at intervals in the circumferential direction of the yoke portion, the yoke portion having: an outer circumferential surface; an inner peripheral surface; a planar first surface connecting the outer peripheral surface and the inner peripheral surface; and a plurality of recessed portions connected to the first surface, each of the plurality of tooth portions having an outer peripheral surface protruding in the axial direction of the yoke portion with respect to the first surface, the plurality of recessed portions being connected to at least a portion of the outer peripheral surface of each of the plurality of tooth portions in the circumferential direction, and each of the plurality of tooth portions having an outer peripheral surface protruding in the axial direction of the yoke portion with respect to the first surface. The shortest distance between at least one of the outer peripheral edge of the first surface and the inner peripheral edge of the first surface and the outer peripheral surface of each of the plurality of tooth portions is all less than or equal to 4 mm, and the yoke portion and the plurality of tooth portions are configured from an integrally molded powder compact.
Need to check novelty before this filing date? Find Prior Art