Magnetic return path and permanent-magnet fixing of a rotor
US7154204B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Dec 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/278
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor for an electric motor having a short-circuit element that has lamination packets in which the laminations of the short-circuit element are embodied with spring elements which press from two sides against permanent magnets of the rotor and as a result center the permanent magnets in the lateral direction independently of production tolerances. After the insertion of the permanent magnets between the spring elements, the short-circuit element with the permanent magnets is potted, for instance with synthetic resin, or spray-coated with plastic. The rotor has the advantage that it compensates for production tolerances of the permanent magnets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.