Patent · US Active

Method and device for calibrating an offset angle

US11870376B2 · kind B2 · utility

0Cited by

0References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Gunther Goetting · Stuttgart, DE
Yuping Chen · Aichholzhof, DE

Key dates

Filing date	Oct 21, 2020
Grant date	Jan 9, 2024
Priority date	—
Expiry date	Oct 21, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH02P2203/03
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method (100) for calibrating an offset angle (PhiO) for field-oriented control of an electric machine (210) between an angle signal (W) of a position encoder (220) and the direction of the rotor flux (RF), having the steps of: periodically varying (120) a current vector (Is) along a line of constant torque; ascertaining (130) a speed signal (n_t) of the position encoder (220) of the electric machine (210); calibrating (140) the offset angle (PhiO) on the basis of the ascertained speed signal (n_t).

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