Converged motor drive control for brushless dc motor
US10594237B2 · kind B2 · utility
3Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2016 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | May 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/17
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system includes a timer to determine a time interval between successive commutation state changes of a brushless direct current (BLDC) motor. A speed calculator computes a speed of the BLDC motor based on the time interval. A threshold calculator determines a threshold based on the computed speed, the threshold specifying a calculation of back electromotive force (BEMF) and mutual inductance of the BLDC motor at a next state change of the BLDC motor. A state change trigger commands the next state change based on a measured voltage associated with a floating phase of the BLDC motor relative to the threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.