Sensorless brushless motor driving apparatus with induced voltage signal latch
US5473232A · kind A · utility
13Cited by
9References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1993 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Nov 23, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/0077
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a driving apparatus for a sensorless brushless motor, changing-over of excitation is executed at every electric angle of 30.degree. from a trigger point defined by a signal obtained by latching an induced voltage at the time of fall-down of the pulse-width modulation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.