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Pat. 10135354 United States, Int. Cl.22 F03D 9/25, H02M 5/458, H02M 1/00, H02P 101/15. DC-link reference voltage determination for wind turbine converter systems : Appl. N 15/541217 : Filed 08.12.2015 : Pub. 20.11.2018 : / Soren Andersen, Gert Karmisholt Andersen, Duy Duc Doan, John Godsk Nielsen ; Assignee Vestas Wind Systems As ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10135354/en?oq=US10135354.html (дата обращения: ДД.ММ.ГГГГ).