Processing a motor variable of a DC motor and actuating device for a motor vehicle
US8513909B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 2012 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Oct 22, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/285
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method processes a motor variable of a DC motor of an actuating device for a motor vehicle. The DC motor is supplied by an on-board system DC voltage, in which the armature current and the motor voltage of the DC motor are detected and the actuating position of an actuating element is determined from a time profile of the armature current by counting the current ripple contained therein. During an initial phase, the armature current which rises over time is replicated by a function which is determined from pairs of values for the motor voltage and the armature current which are detected in a time interval. A current value of the armature current expected at a later point in time is extrapolated. In the event of a discrepancy between the armature current detected at this later point in time and the extrapolated armature current, a ripple count is started.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.