Multipolar excitation systems
US4628245A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1985 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Feb 13, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K19/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A D.C. excited rotor winding arrangement for a dynamoelectric machine comprises at least one closed loop (1,2,3) of three or more series-connected winding sections (10,11,12,13,16,17,18,19,20,21,22,23) with at least three current-supply terminals (ABCD) at their interconnections. At least one pair of adjacent winding sections (10,13; 11,12) generate opposite magnetic poles when fed in parallel with current from their common supply terminal (such terminals are designated "odd", as opposed to "even" terminals which are each associated with two poles of the same sense) and the pole number is varied by switching the current supply from "odd" to "even" terminals or vice versa. Preferably the winding arrangement comprises a plurality of series-connected closed loops (1) of four winding sections interconnected at two odd (B5, D5) and two even (A5, C5) terminals. Preferably the winding arrangement is fed with current from one of a plurality of rotating rectifiers (4,6,7) according to the pole number required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.