Patent · US Active

Discharging a capacitance provided at the output of an inverter

US9225230B2 · kind B2 · utility

0Cited by

6References

20Claims

0Family size

Assignee

SMA Solar Technology AG · DE

Inventors

Benedikt Kuenzel · Geisleden, DE
Carsten Ewig · Kassel, DE
Henrik Wolf · Kassel, DE
Sven Bremicker · Baumbach, DE

Key dates

Filing date	Nov 11, 2011
Grant date	Dec 29, 2015
Priority date	—
Expiry date	Nov 11, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH02M3/22
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method and device to discharge a filter capacitance at the output of an inverter for feeding electrical power from a generation unit into a grid via a grid connect switch is disclosed. The grid connect switch has a generation unit side and a grid side, and via AC grid terminals on the grid side of the grid connect switch, the filter capacitance is connected to at least one of the AC grid terminals. A voltage applied across the filter capacitance is rectified independent of a polarity thereof, and a rectified voltage of a fixed polarity is provided, and a DC voltage link of a power supply unit for supplying power to circuitry of the inverter is charged with this rectified voltage.

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