Rotating electrical machine
US5047680A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1990 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Jun 5, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/60
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotating electric machine comprises a rotor and a stator each having a ferromagnetic core and being separated by a cylindrical air gap. The stator core is provided with three peripheral rings of magnet poles, the poles in each pole ring having alternate opposite polarities and the pole rings having the same number of poles and being spaced axially apart. The rotor core is provided with three peripheral ferromagnetic rings each having peripherally uniformly spaced teeth and spaces therebetween. These toothed rings are located opposite the magnet pole rings and each includes a number of teeth equal to half the number of magnet poles in each magnet pole ring. The mutual angular position between the magnet pole ring and the toothed ring in each associated pair is displaced peripherally in relation to the corresponding position in the other associated pairs by an angle equal to one third of the peripheral extension of a magnet pole pair. The stator core carries two annular coil windings which are coaxial to the motor axis and located between the magnet pole rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.