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Pat. 10084393 United States, Int. Cl.22 H02M 7/48, H02M 7/49, H02M 7/5387, H02M 1/00, H02M 1/32. Cascade converter system and method of putting converter module of the same into operation : Appl. N 15/871122 : Filed 15.01.2018 : Pub. 25.09.2018 : / Tao Xia, Cheng Lu ; Assignee Delta Electronics Shanghai Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10084393/en?oq=US10084393.html (дата обращения: ДД.ММ.ГГГГ).