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Pat. 10523132 United States, Int. Cl.22 H02M 3/135, H02M 1/36, H02M 7/49, H02M 7/517, H02J 3/40. Start-up of HVDC converters : Appl. N 15/529689 : Filed 12.11.2015 : Pub. 31.12.2019 : / Robert Whitehouse, Carl Barker ; Assignee General Electric Technology Gmbh ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10523132/en?oq=US10523132.html (дата обращения: ДД.ММ.ГГГГ).