Commutation position detection system and method
US5821713A · kind A · utility
38Cited by
29References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Feb 3, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved commutation position detection system for accurately determining commutation position within polyphase brushless motors without employing proximity sensors or transducers. The present invention determines commutation position. by differentiating the current flowing within the stator coils and comparing the differentiated current waveforms to one another (absolute commutation position detection) or a predetermined threshold (incremental commutation position detection) to obtain a real-time assessment of commutation position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.