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Single phase bi-directional AC-DC converter with reduced passive components size and common mode electro-magnetic interference

United States Patent

January 31, 2017
View the Complete Patent at the US Patent & Trademark Office
A bidirectional AC-DC converter is presented with reduced passive component size and common mode electro-magnetic interference. The converter includes an improved input stage formed by two coupled differential inductors, two coupled common and differential inductors, one differential capacitor and two common mode capacitors. With this input structure, the volume, weight and cost of the input stage can be reduced greatly. Additionally, the input current ripple and common mode electro-magnetic interference can be greatly attenuated, so lower switching frequency can be adopted to achieve higher efficiency.
Mi; Chris (Detroit, MI), Li; Siqi (Ann Arbor, MI)
The Regents of the University of Michigan (Ann Arbor, MI)
14/ 251,080
April 11, 2014
GOVERNMENT CLAUSE This invention was made with government support under grant number DE-EE0002720 awarded by the Department of Energy. The government has certain rights in this invention.