Motor with recess for index position detection
US5654600A · kind A · utility
14Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1995 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Feb 13, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K11/215
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a motor, and more particularly to a motor having means for detecting an index position. A rotor yoke of the motor is provided with a recess having a width greater than the width of each pole of a rotating magnet. Substantially the whole of one pole of the rotating magnet and a part of another pole adjacent to the one pole on the downstream side in terms of rotation of a rotor are exposed to the recess. The magnetic flux from the magnet exposed to the recess is detected by a Hall element disposed in opposition to the outer circumference of the rotor, thereby specifying the index position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.