Electromagnetic rotary drive and rotational device
US11177719B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2019 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Nov 14, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2360/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic rotary drive includes a rotor, a stator and windings. The rotor includes a magnetically effective core. The rotor is contactlessly magnetically drivable about an axis of rotation and the rotor is contactlessly magnetically levitatable. The stator has coil cores, each with a longitudinal limb parallel with the axis and a transverse limb extending radially, the transverse limb being perpendicular to the axis. The windings generate an electromagnetic rotational field, each winding surrounding one longitudinal limb, such that the stator is free of permanent magnets. The rotor is ferromagnetic or ferrimagnetic with one preferential magnetic direction extending radially, and the core of the rotor has a magnetic resistance in the preferential magnetic direction, the magnetic resistance at most half as large as the magnetic resistance in a direction, which is perpendicular to the preferential magnetic direction and perpendicular to the axial direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.