Patent · US Active

Method and apparatus for determining a measuring offset of a rotor position sensor

US11262221B2 · kind B2 · utility

1Cited by

0References

15Claims

0Family size

Assignee

Valeo Siemens eAutomotive Germany GmbH · DE

Inventors

Bassel Sahhary · Erlangen, DE
Andreas Walter · Egloffstein, DE

Key dates

Filing date	Dec 19, 2018
Grant date	Mar 1, 2022
Priority date	—
Expiry date	May 7, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH02P6/16
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Method for determining a measuring offset of a rotor position sensor (2) assigned to a rotor (3) of an electric machine (5) comprising stator windings that are supplied by an inverter (6) converting a voltage at a DC link capacitor (7) into an AC current, wherein a candidate value for the measuring offset is determined, comprising the following steps: —controlling a power unit (9) of the inverter (6) to provide the current based on rotor position information (19) measured by the rotor position sensor (2) to the stator windings such that the DC link capacitor (7) of the inverter (6) is actively discharged, —evaluating a plausibility of the candidate value for the measuring offset based on a voltage of the DC link capacitor (7) detected while the power unit (9) is controlled to actively discharge the DC link capacitor (7), and —providing the candidate value as determined measuring offset, if a result of the evaluation is positive.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.