Motor or generator
US6703743B2 · kind B2 · utility
27Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2002 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Mar 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/276
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor or a generator which has permanent magnets on a moveable member effectively reduces eddy current loss in the permanent magnets. A permanent magnet 1 which is provided for the moveable member of a motor or a generator, for example the rotor of a rotating motor, is divided into magnet sections (1A-1E) having divided widths (t1-t5) in response to the rate of change in the flux density in each divided magnet. Thus the eddy current loss in each magnet section (1A-1E) can be substantially equalized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.