DC motor stall-detection system
US5367236A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1994 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Mar 25, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/907
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor controller is programmed for detecting motor-stall condition of a dc motor under the control of a motor control system. The motor control system includes a programmable microcontroller in connection with the motor controller and a motor driver. The motor driver communicates with a dc motor. The dc motor is coupled to a position encoder which encoder is in communication with the microcontroller. The method comprises the steps of providing an average stall threshold value ASV and providing the motor controller with a time counter for counting each time interval T to a maximum count N. The motor controller is programmed to issue a motor command representing the position error between the desired motor position and the actual motor position for some time interval T. During each time interval T, the motor command is compared to the average threshold value ASV, if the motor command is greater than the ASV then the count in the time counter is compared with the maximum count N. If the count is equal to the maximum count N then the controller signals the microcontroller a "motor stall" fault. If not, the motor is "OK" and the method is repeated for the next time interval T.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.