Patent · US Expired

Method for measuring the resistance and the inductance of a line

US6713998B2 · kind B2 · utility

14Cited by

3References

10Claims

0Family size

Assignee

ABB RESEARCH LTD. · CH

Inventors

Michael Stanimirov · Trimbach, CH
Bernhard Deck · Wellheim, DE
Walter Rueegg · Endingen, CH

Key dates

Filing date	Nov 1, 2001
Grant date	Mar 30, 2004
Priority date	—
Expiry date	Nov 21, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG01R15/181
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The method described here makes it possible to determine the impedance of a line (1) by measuring the voltage (u) applied across the line and the time derivative of the current (i) flowing through the line. The measured values of the differentiated current are not integrated in this case, but rather are substituted directly, together with the measured voltage values, into an equation system from which the values of the inductance (L) and the resistance (R) of the line (1) can be estimated. In this way, integration of the values of the differentiated current is obviated.

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