System und Verfahren zur Fehlererkennung in der Strommessfunktion einer Elektromotorsteuerung

Details

Veröffentlichungs-Nr.

EP4811651

Anmeldetag

20. März 2025

Veröffentlichung

23. September 2026

Rechtsraum

EP

IPC

H02P29/024

Abstract

A system and method of detecting fault in current sensing of an electric motor controller including a current imbalance detector and a fault detector. The electric motor controller includes a control loop using feedback current values for generating phase current signals driving an electric motor, a current sensor that provides sensed current signals indicative yet independent of the phase current signals, and an estimator that monitors operating parameters of the electric motor and provides estimated current signals. Imbalance occurs when a sum of sensed current signals is outside a threshold of a constant value. The fault detector uses the sensed current signals and the estimated current signals to determine phase criteria markers indicative of phase symmetry and compares each phase criteria marker with an average criteria marker to identify a faulty phase current sensor. The criteria markers are based on deviations between sensed and estimated current signals in each phase.

Anmelder

Firma

NXP B.V.

Land

🇳🇱 Niederlande

Fachgebiete