Method and a device for sensorless estimating the relative angular position between the stator and rotor of a three-phase synchronous motor
US6552509B2 · kind B2 · utility
21Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 10, 2001 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | May 10, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for sensorless estimation of the relative position between the stator and the rotor of a three-phase synchronous motor during operation. The method comprises the steps of low-pass filtering of the terminal voltage, low-pass filtering of the terminal current, high-pass filtering of the terminal current and determining the rotor speed. Next the relative angular position is determined from the filtered magnitudes and corrected with an angular correction derived from the rotor speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.