Motor having an encoder to detect rotation of a rotating body
US8653707B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2011 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Nov 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor includes a shaft, a bearing arranged to support the shaft such that the shaft is rotatable about a central axis, a rotating body fixed to the shaft and including a rotor magnet arranged in an outer circumference thereof, a stator arranged radially outward of the rotor magnet, a circuit board arranged to be perpendicular to the central axis on one axial side of the rotating body, and an encoder arranged to detect rotation of the rotating body. The encoder includes a reflection pattern arranged on a surface of the rotating body which is opposed to the circuit board, and a reflective rotation detection sensor arranged on the circuit board to detect the rotation of the rotating body by irradiating the reflection pattern with light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.