Variable angle stepper motor with spring magnet
US5097162A · kind A · utility
10Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1989 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Dec 7, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stepper motor, having a permanent magnet rotor rotatably mounted within the annulus of a stator winding, also has a rotatable spring magnet and a stationary bias magnet. The spring magnet is attached to the rotor and is disposed adjacent the stationary bias magnet. When the stator winding is not energized, the rotor assumes a home position established by the spring and bias magnets. When the stator winding is energized, the rotor is rotated away from the home position by an angular displacement determined by the winding current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.