Electromagnetic rotary actuator
US5402022A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1992 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Feb 12, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotary actuator (1) with magnetically acting restoring element (18), particularly for controlling a throttle cross-section, is intended to be simplified in its structure and the torque variation of the restoring element (18) is to be improved. For this purpose, the restoring element (18) is constructed of ferromagnetic but not permanently magnetic, material and arranged in the area of the permanent magnet segments (10) of the motor actuator (2). Due to the asymmetrical construction of the restoring element (18) with three short arms (22 to 24) and one extended arm (25), the maximum torque generated by the element (18) is reduced and the restoring angle, from which the element (18) returns back into its desired locking position, is increased. The rotary actuator (1) is suitable, in particular, as rotary idling actuator for internal combustion engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.