Modified electrical actuation of an actuator for determining the time at which an armature strikes a stop
US9412508B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2012 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Apr 1, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/185
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for operating an actuator having a coil and a displaceably mounted armature driven by a magnetic field generated by the coil, in a measurement operating mode for ascertaining a time at which the armature reaches its stop position after activation of the actuator. The method includes applying to the coil an actuation voltage signal dimensioned such that the expected armature stop time falls in a time window in which a temporally constant voltage is applied to the coil, detecting an intensity profile of the current flowing through the coil within the time window, and determining the armature stop time, based on an evaluation of the detected current intensity profile. A method for operating such an actuator is also disclosed, wherein information about the stop time is obtained in a measurement operating mode and used in a series operating mode for optimized actuation of the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.