Method of determining the position of the drive mechanism of an electric machine, such as a motor, from the current supplied, and arrangement for carrying out the method
US8569982B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Jul 3, 2009 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Jun 13, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2203/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and arrangement for determining the position of the drive mechanism of an electric machine from the current supplied thereto. Determination of the position is effected over two independent channels by measuring the three-phase current of the electric machine or motor, converting the measured values to the current space vector, calculating the angle of the current space vector within one electrical revolution, and determining the position of the motor. A current command, the field of which acts in the direction of the flux or field of the drive mechanism or rotor, is added within the motor stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.