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Pat. 11258345 United States, Int. Cl.22 H02M 1/32, H02M 1/00, H02M 5/458, H02P 3/22, H02P 101/15. Method for operating a plurality of chopper circuits : Appl. N 16/956462 : Filed 30.11.2018 : Pub. 22.02.2022 : / Lars Helle, Torsten Lund ; Assignee Vestas Wind Systems As ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11258345/en?oq=US11258345.html (дата обращения: ДД.ММ.ГГГГ).