Patent · US Active

Method for identifying a fault in a rotor of an electric motor and controller

US11493555B2 · kind B2 · utility

0Cited by

1References

13Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Sebastian Huegler · Munich, DE
Jovan Knezevic · Munich, DE
Roman NESTLINGER · Munich, DE

Key dates

Filing date	Aug 10, 2021
Grant date	Nov 8, 2022
Priority date	—
Expiry date	Aug 10, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH02P2207/05
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for operating a separately excited electric motor, which includes a rotor and a stator, includes the following: determining an electrical characteristic variable of the rotor and an electrical characteristic variable of the stator, calculating an initial setpoint voltage value for the stator based on a setpoint current value, a measured current value, and the determined electrical characteristic variables of the rotor and the stator, checking, based on the calculated initial setpoint voltage value, whether there is an electrical fault, in particular a shorted coil, at the rotor, and providing a fault message and/or disconnecting the electric motor if a fault has been identified.

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