Sensor arrangement in an electromagnetic rotary drive and a method for the operation of a rotary drive of this kind
US6355998B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2001 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Feb 27, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/09
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sensor arrangement in an electromagnetic rotary drive which is designed as a bearing-free motor with a magnetically journalled, permanent magnetic rotor (1) and a stator (2), the sensor arrangement serving for the determination of the direction of the rotor magnetization and/or of the axial position of the rotor (1), comprises at least two sensors (S1, S2, S3) for the determination of a magnetic flux. The two sensors (S1, S2, S3) are arranged in such a manner with respect to the rotor (1) that partial fluxes of that magnetic field which the stray field of the permanent magnetic rotor (1) produces can be determined with them. Furthermore, a method for the determination of the direction of the rotor magnetization is proposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.