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Pat. 11437818 United States, Int. Cl.22 H02M 7/538, H02J 3/00, H02J 3/36, H02M 7/5387, H02M 7/757. Power supply apparatus for supplying power to an external electrical load in HVDC power transmission systems : Appl. N 16/063168 : Filed 06.12.2016 : Pub. 06.09.2022 : / Colin Charnock Davidson ; Assignee General Electric Technology Gmbh ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11437818/en?oq=US11437818.html (дата обращения: ДД.ММ.ГГГГ).