Method and apparatus for using back EMF to control a motor
US5936365A · kind A · utility
17Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1998 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Jul 15, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/182
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit to control a motor having phase inputs. A respective control signal for each phase input of the motor is generated such that each phase input is cyclically driven and undriven. Additionally, changes at each phase input relative to a reference potential are measured, and changes at each phase input during time intervals in which noise is expected are ignored: timing information based on the measured changes at the phase inputs is generated, and timing information to carry out the step of generating a respective control signal is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.