Patent · US Active

Active filter topology for cascaded inverters

US10418917B2 · kind B2 · utility

1Cited by

1References

17Claims

0Family size

Assignee

ABB Schweiz AG · CH

Inventors

Gustav Bergquist · Stockholm, SE
Tomas Modeer · Stockholm, SE
Joakim Asplund · Stockholm, SE

Key dates

Filing date	Nov 11, 2016
Grant date	Sep 17, 2019
Priority date	—
Expiry date	Nov 11, 2036

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E40/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for generating a combined output waveform (VOUT) in a power inverter system (100) is disclosed. The power inverter system comprises a voltage equaliser (120) having an energy storage element adapted to be charged by a combined output voltage from a plurality of switching units and to add an adjustable voltage to the combined output waveform. A voltage of the combined output waveform is measured, a difference (Δ) between the measured voltage of the output waveform and a voltage of a target waveform (UT) is determined, and a voltage (UCORR) corresponding to the determined difference is added, by the voltage equaliser, to the combined output waveform so as to improve the matching of the combined output power waveform and the target power waveform.

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