Method and system for estimating rotor angular position and rotor angular velocity at low speeds or standstill
US7577545B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 2007 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | May 29, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and system for estimating an angular position and an angular velocity of a rotor in a dynamoelectric machine measures an AC current and a potential for each of a plurality of windings coupled to a stator of the dynamoelectric machine, transforms the measured currents and potentials to a stationary frame to produce transformed currents and transformed potentials, and processes the transformed currents and transformed potentials to produce a first intermediate signal and a second intermediate signal. The first intermediate signal and the second intermediate signal are cross-coupled by being processed to obtain a first extended rotor flux value and a second extended rotor flux value that are each functions of the first intermediate signal and the second intermediate signal. The first extended rotor flux value and the second extended rotor flux value are applied to a phase lock loop to derive an estimated rotor angular position and an estimated rotor angular velocity for the dynamoelectric machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.