Method for detecting a step loss condition
US8736298B2 · kind B2 · utility
1Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 26, 2011 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Dec 31, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/343
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting and correcting for a step loss condition. A back electromagnetic force signal is measured and compared to a reference voltage. The motor continues operating and the back electromagnetic force signal is measured again and compared to the reference voltage. If the measured levels of the back emf voltages are less than the reference voltage, a step loss condition has occurred and the stator field is repositioned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.