Bearingless electric rotary drive
US8581462B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2010 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Aug 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/146
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric rotary drive is proposed, designed as a bearingless external rotor motor, having a magnetically supported, substantially ring-shaped rotor (3) which is arranged around an inwardly disposed stator (2), wherein an air gap (4) is provided between the rotor (3) and the stator (2), wherein the stator (2) is designed as a bearing and drive stator with which the rotation of the rotor (3) can be driven about an axis of rotation (A) and with which the rotor (3) can be magnetically supported, wherein the rotor (3) is radially supported in an actively magnetic manner in the plane perpendicular to the axis of rotation (A) and is supported axially in the direction of the axis of rotation (A) and against tilting in a passively magnetic manner. The stator (2) has, at least in its marginal region (26), a magnetic height (H1) which is smaller than the magnetic rotor height (H2) of the rotor (3) in its radially inwardly disposed region (36).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.