Voltage mode drive for control circuit for an actuator using sampled back EMF control
US6184645A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Sep 2, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59605
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for controlling an actuator in response to a target speed voltage signal, the actuator having a moveable member and having a coil that influences movement of the member. A first summing node is provided having a control output voltage, for summing or subtracting voltages applied thereto, as the case may be and receiving the target speed voltage signal at a first, summing input thereto. A proportional compensation unit is provided, receiving the control output voltage and providing as an output a proportionally compensated output signal. An integral compensation unit is provided, receiving the control output voltage and providing as an output an integrally compensated output signal. An inverse compensation unit is provided, receiving the target speed voltage signal as an input and providing an inversely compensated output signal having a voltage corresponding to the voltage of the target speed voltage signal multiplied by the inverse of a predetermined amplification factor. A second summing node is provided, receiving the proportionally compensated output signal, the integrally compensated output signal and the inversely compensated output signal, and having a command o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.