Shaft sensorless angular position and velocity estimation for a dynamoelectric machine based on extended rotor flux
US7072790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2004 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Nov 26, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A shaft sensorless rotor angular position and velocity sensing system for a ynamoelectric machine that includes: a reference frame transformation function for transforming measured currents and potentials applied to a stator of the dynamoelectric machine to a two-phase α-β stationary frame to produce transformed currents Iα,Iβ and transformed potentials Vα,Vβ; first and second multipliers to produce signals Iα*RS,Iβ*RS; first and second summers to produce signals Vα,−Iα*RS,Vβ−Iβ*RS; first and second lag functions to produce signalsthird and fourth multipliers to produce signals Iα*Lq,Iβ*Lq; third and fourth summers to produce signalsthat correspond to extended rotor flux values λextα,λextβ; and a phase lock loop (PLL) to derive estimated rotor angular position and velocity values {circumflex over (θ)}, {circumflex over (ω)} for the dynamoelectric machine from the extended rotor flux values λextα,λextβ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.