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Pat. 11539284 United States, Int. Cl.22 H02M 3/158, H02M 1/00. DC conversion system and control method thereof : Appl. N 17/333172 : Filed 28.05.2021 : Pub. 27.12.2022 : / Yi Zhang, Pian Zhou, Hongwei Xiao, Teng Liu ; Assignee Delta Electronics Shanghai Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11539284/en?oq=US11539284.html (дата обращения: ДД.ММ.ГГГГ).