Method and device for identifying the anisotrophy of an electric three-phase machine
US12334844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2023 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Mar 1, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for identifying magnetic anisotropy of an electric three-phase machine having a rotor and a stator is provided. The method includes actuating the machine with a periodic injection voltage via clocked clamping voltages according to a pulse width modulation (PWM) scheme having a switching frequency. An electric current of the machine responsive to the machine being actuated by the periodic injection voltage is cyclically measured at a sampling frequency. The periodic injection voltage has a period that is less than twice a period of the sampling frequency. An inductance and/or an admittance of the machine is determined based on the periodic injection voltage and the measured electric current. A position of the rotor is determined based on the inductance and/or the admittance of the machine. The machine is controlled according to the rotor position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.