Brushless D.C. dynamoelectric machine having ferrite material magnetic circuit
US4605874A · kind A · utility
84Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1985 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Feb 20, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K23/54
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dynamoelectric machine which may operate in a motor mode or a generator mode is described wherein substantially the entire magnetic circuit is provided by ferrite material. In one particular embodiment, hard ferrite permanent magnet segments are mounted on a rotor plate while soft ferrite magnet segments with electrical coil windings mounted thereon are provided in a stator spaced apart from the rotor by an air gap. Other embodiments of the concept are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.