Method and device for determining the position angle of a rotor in an electric synchronous machine
US11081986B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2018 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Apr 25, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2203/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method and device for determining the position angle of a rotor (2) in an electric synchronous machine (1). The device is designed to comprise: a voltage generator (12) for generating electrical voltage pulses at angles in a coordinate system fixed in respect of the stator when the rotor (2) is stationary; a measuring device (14) for measuring any electrical current value returning to the electrical voltage pulses generated by the voltage generator (12); and a computing device (16), which is designed: —to store a current signal curve of the current values measured; —to generate a zero-mean current signal curve by shifting the current signal curve or the measured current values; —to compute an integral function (83) of the zero-mean current signal curve; and—to determine the position angle of the rotor (2) on the basis of the computed integral function (83).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.