System and method for determining barrier motor parameters without using sensors
US7372224B2 · kind B2 · utility
6Cited by
10References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2005 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Sep 30, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/29
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A barrier operator comprises a first measuring apparatus for measuring a current used by a direct current (dc) motor to move a barrier and a second measuring apparatus for measuring a generated voltage of the dc motor. A controller is coupled to the first measuring apparatus and the second measuring apparatus. The controller is programmed to calculate a torque of the dc motor by using the current and to determine when an obstruction exists in the path of the barrier based upon the calculated torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.