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Pat. 11011992 United States, Int. Cl.22 H02M 3/158. Method and system for reducing the circulating current between multiple non-isolated modules operating in parallel : Appl. N 16/724395 : Filed 23.12.2019 : Pub. 18.05.2021 : / Hongguang Liu, Xinmin Bai ; Assignee Delta Electronics Shanghai Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11011992/en?oq=US11011992.html (дата обращения: ДД.ММ.ГГГГ).