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Pat. 10692650 United States, Int. Cl.22 H01F 30/12, H01F 3/10, H01F 27/26, H01F 27/30, H02M 3/24, H01F 3/14, H01F 27/12, H01F 27/32. Three-phase transformer : Appl. N 16/127790 : Filed 11.09.2018 : Pub. 23.06.2020 : / Chao Zhi, Takuya Maeda ; Assignee Fanuc Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10692650/en?oq=US10692650.html (дата обращения: ДД.ММ.ГГГГ).