Method for making rotor for permanent magnet electric machine
US7350283B2 · kind B2 · utility
6Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 2004 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | May 27, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49879
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for making a rotor for a permanent magnet electric motor comprising the steps of providing an annular permanent magnet and an annular back-up member. Affixing the magnet to the inner surface of the back-up member in an un-magnetized condition and overmolding both in an injection molding process while controlling the flow of the molten plastic so as to cause the plastic to engage the opposite sides of the magnet at substantially the same time resulting in a knit line intermediate the magnet sides on the inner surface of the magnet. Magnetizing the magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.