Patent · US Active

Method for converting direct voltage into three-phase alternating voltage

US7576449B2 · kind B2 · utility

25Cited by

1References

13Claims

0Family size

Assignee

SMA Solar Technology AG · DE

Inventors

Holger Becker · Darmstadt, DE
Gunther Cramer · Kassel, DE
Sven Bremicker · Baumbach, DE
Thorsten Dingel · Kassel, DE
Bernd Engel · Stuttgart, DE
Wilfried Groote · Vellmar, DE
Frank Greizer · Kaufungen, DE
Ralf Joachim Laschinski · Kassel, DE
Matthias Victor · Kassel, DE
Torben Westphal · Aurich, DE

Key dates

Filing date	Jan 8, 2007
Grant date	Aug 18, 2009
Priority date	—
Expiry date	Jul 29, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E40/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method of converting a direct voltage generated by a decentralized power supply system into three-phase alternating voltage by means of a plurality of single-phase inverters (WR1-WR3), said alternating voltage being provided for supplying an electric mains, is intended to avoid inadmissible load unbalances using single-phase inverters. This is achieved in that, upon failure of one inverter (WR1-WR3), an asymmetrical power supply distribution is reduced by limiting the output of the other inverters. The method makes it possible to simplify three-phase voltage monitoring.

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