Changeable pole three phase winding
US4127787A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1976 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | Feb 17, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K17/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In order to obtain any number of poles in the ratio p.sub.1 : p.sub.2 = 3m : 2n in a pole changeable three phase winding having nine base winding branches and only six connecting points with a simple, symmetrical, low harmonic content winding, three equiphasal induced coil sides belonging to the same phase of the winding are arranged such that for a pole pair number p.sub.2 they are located in three respective slots appearing as vectors with the same direction in the p.sub.2 pole pair slot-vector star or, in the case of at least two coils being arranged in each slot layer, two of every three such equiphasal induced coils belonging to the same phase for a pole number p.sub.2 are accommodated in a common slot with the third in a second slot appearing as a vector with the same direction in the p.sub.2 -pole pair slot-vector star.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.