Method for checking out-of-step of synchronous motor
US9887646B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 27, 2013 |
| Grant date | Feb 6, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for checking an out-of-step of a synchronous motor includes detecting electric degrees of the synchronous motor, in which the electric degrees comprise at least a first electric degree and a second electric degree detected at a preset interval, and the second electric degree is detected after the first electric degree; comparing the first electric degree with the second electric degree to obtain a comparing result; and determining that the synchronous motor is out of step when the comparing result satisfies a preset requirement. It is determined that the synchronous motor is out of step when the electric degree keeps unchanged or decreases progressively, or an increment of the electric degree is very small.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.