Rotor for rotary electric machine
US11482898B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2019 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | Jul 4, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention reduces tensile stress generated in the rotor core in a radial direction when a rotor core and a rotor support member are joined. A region in an axial direction (L) in which a melted joint portion (W2) for joining a rotor core (2) and a rotor support member (9) is formed is set as an axial joint region (JR). Among a plurality of corner portions (4c) of the permanent magnet (4), at least one corner portion (4c) that overlaps with the axial joint region (JR) when seen in a radial direction and that faces an outer peripheral surface (CP2) of the rotor core (2) is set as a specific corner portion (4s). Among facing surface portions (5p) of an inner wall portion of the magnet insertion hole (5) that face the corner portions (4c), the facing surface portion (5p) that faces the specific corner portion (4s) is set as a specific facing surface portion (5s). A clearance (G) formed between the specific corner portion (4s) and the specific facing surface portion (5s) is larger than a clearance formed between another corner portion (4c) and another facing surface portion (5p).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.