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Title: Converter topologies for common mode voltage reduction

An inverter includes a three-winding transformer, a DC-AC inverter electrically coupled to the first winding of the transformer, a cycloconverter electrically coupled to the second winding of the transformer, and an active filter electrically coupled to the third winding of the transformer. The DC-AC inverter is adapted to convert the input DC waveform to an AC waveform delivered to the transformer at the first winding. The cycloconverter is adapted to convert an AC waveform received at the second winding of the transformer to the output AC waveform having a grid frequency of the AC grid. The active filter is adapted to sink and source power with one or more energy storage devices based on a mismatch in power between the DC source and the AC grid. At least two of the DC-AC inverter, the cycloconverter, or the active filter are electrically coupled via a common reference electrical interconnect.
Inventors:
Issue Date:
OSTI Identifier:
1409820
Assignee:
SunPower Corporation (San Jose, CA) DOEEE
Patent Number(s):
9,825,556
Application Number:
15/080,142
Contract Number:
EE0005341
Resource Relation:
Patent File Date: 2016 Mar 24
Research Org:
SunPower Corporation, San Jose, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION

Other works cited in this record:

Gate drive circuit for insulated gate semiconductor device and flash controller using the circuit
patent, August 1992

Apparatus for converting direct current to alternating current using an active filter to reduce double-frequency ripple power of bus waveform
patent, October 2012

Control scheme for DC/AC cycloconverter
patent-application, March 2008

Apparatus For Converting Direct Current To Alternating Current
patent-application, February 2011

GRID-TIED POWER CONVERSION CIRCUITS AND RELATED TECHNIQUES
patent-application, July 2011

Photovoltaic Units, Methods Of Operating Photovoltaic Units And Controllers Therefor
patent-application, April 2012

Converter Topologies
patent-application, September 2014

Multi-Bridge Topology
patent-application, October 2014

Three-Port Series-Resonant DC–DC Converter to Interface Renewable Energy Sources With Bidirectional Load and Energy Storage Ports
journal, October 2009
  • Krishnaswami, H.; Mohan, N.
  • IEEE Transactions on Power Electronics, Vol. 24, Issue 10, p. 2289-2297
  • DOI: 10.1109/TPEL.2009.2022756

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