Patent · US Active

Monitoring of the aging of the capacitors in a converter by means of capacitance measurement

US8183874B2 · kind B2 · utility

12Cited by

0References

2Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Mike Dommaschk · Guteborn, DE
Jörg Dorn · Buttenheim, DE
Ingo Euler · Erlangen, DE
Jörg Lang · Stadtsteinach, DE
Quoc-Buu Tu · Roßtal, DE
Klaus Würflinger · Koblenzer Straße, DE

Key dates

Filing date	Dec 8, 2006
Grant date	May 22, 2012
Priority date	—
Expiry date	Jan 25, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/64
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method and a device for converting an electrical current include at least one phase module having an AC voltage connection and at least one DC voltage connection. A phase module branch is disposed between each DC voltage connection and the AC voltage connection. Each phase module branch includes a series circuit of submodules, each having a capacitor and at least one power semiconductor. The apparatus can establish aging of an energy storage device in a simple manner by using a capacitor diagnosis device for a time-dependent determination of the capacitance of each capacitor.

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