Patent · US Active

Monitoring an electrical machine for the presence of a fault

US11336219B2 · kind B2 · utility

0Cited by

3References

16Claims

0Family size

Assignee

ROLLS-ROYCE DEUTSCHLAND LTD & CO KG · DE

Inventors

Christian Stanek · Marquartstein, DE
Johannes Heissenberger · Taufkirchen, DE
Dieter Cramer · Graz, AT

Key dates

Filing date	Jul 2, 2020
Grant date	May 17, 2022
Priority date	—
Expiry date	Jul 21, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH02P2101/45
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The disclosure relates to an electric machine and in particular to the monitoring of the electric machine for the presence of a fault, (e.g., in the stator windings). A monitoring unit is provided, wherein the monitoring unit measures the multiphase electrical time signals transmitted from or to the machine and with the aid of a Hilbert filter determines substantially in real time the envelopes and the phase positions of the individual phases of the time signal. The envelopes corresponding to the different phases or the corresponding phase positions are compared with one another by way of forming differences and, in the event that one or more of the differences deviate(s) from a specified expectation value, the presence of a fault is inferred. The approach allows significantly increased operational reliability of the electric machine to be achieved in particular.

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