Motor having a rotor with interior split-permanent-magnet
US6340857B2 · kind B2 · utility
52Cited by
30References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1999 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Dec 23, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor includes a rotor with interior permanent magnets and a stator with teeth wound by concentrated windings. Each permanent magnet is split along a plane oriented towards the stator, and an electrically insulating section is set between the spilt magnet pieces. This structure allows each permanent magnet to be electrically split, thereby restraining the production of an eddy current. As a result, heat-production is dampened thereby preventing heat demagnetization of the permanent magnets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.