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Modular inverter system

United States Patent

9,722,427
August 1, 2017
View the Complete Patent at the US Patent & Trademark Office
A system connected to an AC power grid having an AC phase signal includes an inverter module including a first inverter coupled to a DC voltage, actuated based on the AC phase signal. The first inverter provides a first voltage signal having predetermined harmonic components. A second inverter includes second switch elements coupled to the DC voltage and actuated by a second set of control signals phase delayed with respect to the first control signals. A transformer module has first and second primary windings coupled to the first and second inverters. The transformer module further includes a secondary winding coupled to first primary winding, the second primary winding, and the AC power grid. The secondary winding is configured to provide a secondary output voltage to the AC power grid by combining the first voltage signal and the second voltage signal such that the predetermined harmonic components are substantially cancelled.
Ma; Mingyao (Orlando, FL), Hu; Haibing (Orlando, FL), Kutkut; Nasser (Orlando, FL), Batarseh; Issa (Orlando, FL), Shen; John (Oveido, FL), Bkayrat; Raed (Redondo Beach, CA)
University of Central Florida Research Foundation, Inc. (Orlando, FL)
13/ 979,474
June 28, 2013
STATEMENT OF GOVERNMENT INTEREST This invention was made with government support under Agency Contract Number: DEEE0003176 award by the U.S. Department of Energy. The government has certain rights in the invention.