Motor speed-based anti-pinch control apparatus and method with start-up transient detection and compensation
US6794837B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2002 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Jul 28, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H1/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control apparatus and method for a panel movable between at least two positions by an electric motor having a rotatable armature. The control generates time periods for the rotation of the armature over a constant angular distance. An average time period is computed over a predetermined number of time periods and compared with a threshold time period to determine if an obstacle is present in the path of movement of the closure. Transient counts are accumulated for increasing average time periods over a number of time period samples to detect an obstacle. A compensation factor is used to adjust a threshold upon detecting a start-up transient during an initial movement of the motor armature coupled to the panel to delay activation of obstacle detection until the start-up transient diminishes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.