Method and system for estimating rotor angle of an electric machine
US8810169B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2011 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Jul 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Position samples are stored from an encoder coupled to a permanent magnet electric machine. A data processor determines first changes in position between successive position samples and second changes between successive first changes in position. A data processor determines whether each first change in position is generally increasing, decreasing or constant. A corrective motion factor is applied to each stored position sample based on whether the first change in position is generally increasing or decreasing. The data processor estimates a final rotor angle of the electric machine based on a particular one of the position samples and a corresponding first change in position associated with the particular one of the position samples corresponding to a respective time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.