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Pat. 9979273 United States, Int. Cl.22 H01F 27/28, H01F 3/14, H01F 21/08, H01F 27/24, H01F 29/14, H02J 50/12, H02M 1/088, H02M 3/335, H02M 7/537, H02M 1/00. Resonant converters with variable inductor : Appl. N 15/159159 : Filed 19.05.2016 : Pub. 22.05.2018 : / Harish Suryanarayana, Jiaqi Liang, Jukka-Pekka Kittila, Wen Ouyang ; Assignee Abb Schweiz Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9979273/en?oq=US9979273.html (дата обращения: ДД.ММ.ГГГГ).