Method and apparatus to tune rotor's torsional natural frequency by geometry of rotor winding slot
US6833640B2 · kind B2 · utility
0Cited by
26References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2000 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Jan 31, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for tuning the torsional natural frequency of a rotor is disclosed. At least one tuning slot is formed within the winding slots defined by radially projecting winding teeth. The tuning slot extends radially inward from the bottom of the winding slot a distance to tune the rotor to a desired torsional natural frequency. This tuning slot can be positioned preferably at the quadrature axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.