Dynamoelectric machine
US6020660A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1997 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Dec 10, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dynamoelectric machine includes a stator having a stator core. A winding is provided on the stator core and the stator core has a stator bore. A rotor including a rotor core is received in the stator bore. A permanent magnet is mounted on the rotor core periphery and a rotor shaft is mounted on the rotor core. Bearing means are provided for supporting the rotor shaft for rotation relative to the stator. A first circuit board having electrical components thereon is used in operating the dynamoelectric machine, and a second circuit board having an electrical component in the form of a sensing device thereon is used in determining the position of the rotor. The first circuit board is constructed for mounting the second circuit board thereon so that the second circuit board projects axially inwardly from the first circuit board and the sensing device is disposed in an axial position overlapping the axial position of the permanent magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.