Unipolar transverse flux machine
US6847135B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2001 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Dec 11, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a unipolar transverse flux machine, for its modular construction, at least one rotor module has two coaxial, ferromagnetic rotor rings, toothed with a constant tooth pitch over its outer circumference, and a unipolarly magnetized permanent magnet ring fastened between them, and as at least one stator module, concentric with it, has a number of yokelike stator poles corresponding to twice the number of teeth of the rotor module, the stator poles being offset from one another by a pole pitch (τ) and with their two yoke legs facing the two rotor rings, with an air gap between them, and an annular coil. At least one pair of stator pole groups having the same number of stator poles is formed, and these groups are displaced relative to one another by an electrical angle α=180°/ν, where ν is the ordinal number of the harmonic in the torque that is suppressed by this displacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.