Rotor for a permanent-magnet embedded motor having permanent magnets fitted into a plurality of magnet insertion holes formed in a circumferential direction
US9577483B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2012 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Nov 13, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor includes a plurality of magnets, and an annular rotor core having a plurality of magnet insertion holes formed in a circumferential direction, into which the magnets are respectively inserted, in which each of the magnet insertion holes is formed with a protruding portion A on an inner wall surface on an inner diameter side in a radial direction of the rotor, and each of the magnets is formed with a recessed portion that is fitted to the protruding portion A when the magnet is inserted into the magnet insertion holes. With this configuration, fixation of the magnets is facilitated, and generation of chipping and vibration noise due to a movement of the magnets at the time of activation or rotation can be suppressed, thereby enabling to provide the rotor having high quality and high reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.