Patent · US Active

Method for ascertaining a mains frequency in a voltage signal, and mains analyzer

US8024143B2 · kind B2 · utility

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18Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventor

Rainer Hauser · Koblenzer Straße, DE

Key dates

Filing date	Aug 1, 2008
Grant date	Sep 20, 2011
Priority date	—
Expiry date	Dec 10, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01R23/02
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for ascertaining a mains frequency from a voltage signal which has a particularly high proportion of harmonics includes stipulating a sample frequency for a sample collection, polling a voltage signal at equidistant times during periods of the sample oscillation. A discrete Fourier transform may be used to calculate two phases, and a phase interval between these two phases is used to infer the mains frequency.

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