Rotor with permanent magnets having thermal expansion gaps
US4678954A · kind A · utility
45Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1986 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Jun 2, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pair of positioning rings are engaged on the outer peripheral surface of a shaft, and a plurality of permanent magnets are provided on the outer surface of the shaft between the positioning rings. The permanent magnets are bonded to the shaft by a bonding agent which fills the spaces between the shaft and the permanent magnets, and an air gap is formed between the permanent magnets and the positioning rings, to allow thermal expansion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.