Position sensing method and apparatus for synchronous motor generator system
US7045986B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2004 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Mar 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2101/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A position sensing apparatus (300) derives rotor position of a synchronous machine (200) from signals output from the machine (200). In one embodiment, the position sensing apparatus (300) comprises: a bandpass filter (322) that filters phase voltage signals output from main stator windings (216) of the synchronous machine (200) during AC excitation, thereby extracting a rotor position-indicating component from the phase voltage signals; a converter (324) that converts the filtered phase voltages into balanced two-phase quadrature signals, the balanced two-phase quadrature signals indicating positioning of the rotor (212); and an excitation controller (204) for controlling AC excitation frequency as a function of rotor speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.