Method for identifying the electrical resistance of the rotor of an electric motor
US10551418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2018 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Apr 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for identifying a resistance value (Rr) of the rotor of an electric induction motor (M), including determining a reference voltage (urefS) on the basis of a chosen value ({circumflex over (R)}r) for the resistance of the rotor of the electric motor, applying a control voltage (uS) to the electric motor, the control voltage being determined on the basis of the reference voltage (urefS), acquiring the values of the currents (i1, i2, i3) measured in the three phases of the electric motor, so as to deduce a stator current (iS) of the electric motor therefrom, comparing the obtained stator current (iS) with a predetermined value (irefS), correcting the value ({circumflex over (R)}r) used for the resistance (Rr) of the rotor and applying steps a) to d) until obtaining a stator current (iS) equal to the predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.