Homopolar dynamoelectric machine with an auxiliary field coil
US4602179A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1984 |
| Grant date | Jul 22, 1986 |
| Priority date | — |
| Expiry date | Dec 3, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K31/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drum type homopolar dynamoelectric machine includes a rotor, a main field coil and an auxiliary field coil. The field coils encircle different portions of the rotor and are supported by a stator structure having a main pole piece for directing magnetic flux produced by current flowing in the main field coil radially into a section of the rotor. A current transfer assembly makes sliding electrical contact with a current collecting zone on the surface of the rotor which is axially positioned between the main and auxiliary field coils. Current flowing in the auxiliary field coil tends to reduce the amount of leakage flux in the current collecting zone produced by current flowing in the main field coil. This reduces undesirable circulating currents in the rotor current collecting zone and the associated current collecting structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.