Pole changeable three phase winding
US4284919A · kind A · utility
9Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1979 |
| Grant date | Aug 18, 1981 |
| Priority date | — |
| Expiry date | Sep 19, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K17/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a pole-changeable three-phase winding for p.sub.1 :p.sub.2 =(3m.+-.1)/3n (m and n being integers). This eliminates coils for the primary pole pair number p.sub.1 in the base winding branches and the parallel-connected null winding branches which are active only in this level. The same number of additional coils with reduced turn number are additionally series-connected between the terminals of the secondary pole pair number p.sub.2, so that at constant effective turn number w.sub.1 times the winding factor .xi..sub.1 a reduction of the copper losses is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.