Method for sensing the back electromotive force induced in the winding of a voice coil motor
US7215094B2 · kind B2 · utility
5Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 2006 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | May 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/034
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for sensing a back electromotive force induced in a winding of a voice coil electro-mechanical actuator controlled in a discontinuous mode by alternating conduction phases to off-phases includes sensing voltage at terminals of the winding during an off-phase The winding is driven during a conduction phase immediately preceding the off-phase to invert, during a final portion of the conduction phase before entering an off-phase, a direction of flow of the current through the winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.