Method for making permanent magnet rotor
US5881448A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53143
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet rotor includes a core and a plurality of magnetizable elements held about the outer circumferential surface of the core, as by an adhesive. The core and magnetizable elements are cold-pressed into a deep drawn cup-shaped outer metallic shell having a substantially closed end wall and an opposite open end defined by a peripheral edge which is rolled over the periphery of an end plate to encapsulate the core and magnetizable elements within the shell. An insulator disk is preferably disposed between each end of the core and the adjacent shell end wall and end plate. The permanent magnet rotor may be formed by a methond and apparatus that cold press the core and magnetizable elements into the cup-shaped shell and form the peripheral edge of the shell over the end plate to effect encapulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.