Control system for an industrial robot
US8099193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2007 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | Jan 23, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/42284
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control system for controlling an industrial robot and a method thereof. A control unit generates a control signal for controlling the motor. At least one drive unit controls the motor. The drive unit includes a switching unit adapted to convert DC current to alternating current to the motor in dependence on the control signal. A safety unit generates a stop signal for stopping the robot upon occurrence of a safety event. The drive unit disables the switching unit upon receiving the stop signal. The safety unit generates the stop signal with a time delay with respect to the safety event. The control unit generates the control signal in such a way that the motor is electrically braked during the time delay. The control system transfers the stop signal to the brake, which mechanically brakes the motor upon receiving the stop signal, and delays the stop signal to the drive unit so that the brake receives the stop signal before the drive unit to ensure that the mechanical brake is applied before the switching unit is disabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.