Rotor core utilizing laminations having slots with dual direction skew portions
US6777847B1 · kind B1 · utility
41Cited by
24References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2001 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Apr 2, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Divided magnet rotors R having a stepped skew rather than a helical skew are described. The stepped skew enables the use of straight magnet sections (44) that can be inserted into the rotor core notches (38) thereby eliminating the need to produce a helix from the rotor cage. The stepped skew is effective in decoupling stator slot order harmonics. In addition, the stepped skew rotor R includes, in some embodiments, open slots (22) so that the rotor is not subject to rotor bridge saturation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.