Patent · US Active

Method for identifying dirt and/or dew on components of a voltage intermediate circuit converter

US8786450B2 · kind B2 · utility

3Cited by

5References

4Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Christian Dietrich · Jena, DE
Werner Fischer · Heimsheim, DE
Jörg Hassel · Erlangen, DE
Marc Hiller · Lauf an der Pegnitz, DE
Carsten Probol · Buckenhof, DE
Rainer Sommer · Heroldsbach, DE

Key dates

Filing date	Jan 29, 2010
Grant date	Jul 22, 2014
Priority date	—
Expiry date	Apr 17, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH02M1/32
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a method for identifying dirt and/or dew on components of a voltage intermediate circuit converter. According to the invention, the temporal curve of a partial discharge pulsed current is detected at least during a precharging process of an intermediate circuit capacitor of the voltage intermediate circuit converter comprising at least one capacitor, wherein a frequency spectrum is calculated from said current pulse, and wherein depending of the result, a dirt warning and/or a dew warning is activated. Thus, the degree of dirt and/or dew of said voltage intermediate circuit converter can be determined at least during a charging process of an intermediate circuit capacitor of a voltage intermediate circuit converter, thereby preventing a breakdown including the consequences thereof.

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