Methods and apparatus for a permanent magnet machine with segmented ferrite magnets
US7902711B2 · kind B2 · utility
11Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2008 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Mar 27, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An internal permanent magnet machine (“IPM machine”) of the type used, for example, with traction motors and hybrid electric vehicles, includes a rotor having a plurality of equal-sized (e.g., rectilinear) segmented ferrite magnets arranged in one or more layers. The magnets are inserted within rotor slots that are larger than the magnets themselves, such that one or more air gaps are formed adjacent to the magnets in each layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.