Stator for electric machines
US7385331B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2005 |
| Grant date | Jun 10, 2008 |
| Priority date | — |
| Expiry date | Jan 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/165
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The stator for electrical machines has stator slots that are open radially inward, at least some of which contain coils made from round wire and have side walls (10, 12) of equal length that each extend parallel to their center radial plane. To attain an especially high fill factor, the entrances (16) of the stator slots have a width, measured transversely to their center radial plane, that is slightly greater than the diameter d of the round wire (18). A further condition is that the width of the stator slots, measured between the parallel side walls (10, 12), amounts to (1+cos 30°)d, and the radially outer slot wall (14) forms angles of 60° and 120°, respectively, with each of the two side walls (10, 12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.