Digital robot control providing pulse width modulation for a brushless DC drive
US4874997A · kind A · utility
20Cited by
21References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45083
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Circuitry is provided for applying a pulse width modulation (PWM) scheme to a brushless DC motor that operates as a robot axis drive. A pulse width modulation (PWM) scheme provides for digital implementation of robot control commands. For this purpose, it provides time stabilized current sampling synchronized to the sampling frequency of the position and velocity loops in the robot control. The brushless drive application circuitry provides for application of the PWM control outputs to commutate the motor energization from winding pair to winding pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.