Stall protection for brush motors with rotation sensing brush device
US6791218B1 · kind B1 · utility
4Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 2003 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Sep 1, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K23/66
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for protecting a motor from a stall condition includes a brush motor 11 having power brushes 14 and 16 that convey power to windings of the motor, and one sensing brush 20 constructed and arranged to sense a speed of rotation of an armature motor. A controller 23 is constructed and arranged to compare a sensed speed of rotation with a minimum speed value that is indicative of a stall condition. A relay 28 is constructed and arranged to disconnect power to the motor if the sensed speed is below the minimum speed value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.