Patent · US Active

Inverter device comprising a topology surveying a series of capacitors

US8975899B2 · kind B2 · utility

3Cited by

18References

18Claims

0Family size

Assignee

SMA Solar Technology AG · DE

Inventors

Henrik Wolf · Kassel, DE
Thomas Wegener · Neuruppin, DE
Daniel L. Clemens · Kassel, DE
Harald Drangmeister · Kassel, DE

Key dates

Filing date	Jul 13, 2012
Grant date	Mar 10, 2015
Priority date	—
Expiry date	Mar 8, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E10/56
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An inverter device for feeding electrical energy from a DC-power source into a power grid includes a pair of bus lines to be connected to the DC-power source; a plurality of capacitors connected in series between the bus lines; a surveying topology surveying an integrity of the plurality of capacitors, and to provide a signal indicating a loss of integrity of one capacitor of the plurality of capacitors; a voltmeter measuring a voltage drop over the plurality of capacitors; a DC/AC-inverter; and a controller. in case of the signal indicating a loss of integrity of one capacitor of the plurality of capacitors, the controller compares the voltage drop over the plurality of capacitors to a lost integrity threshold voltage value, and reduces a current load to the plurality of capacitors by reducing the power uptake of the DC/AC-inverter, when the voltage drop exceeds the lost integrity threshold voltage value.

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