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Pat. 11502515 United States, Int. Cl.22 H02J 3/00, B60L 53/53, G01R 19/165, G05B 19/042, H02J 3/32, H02J 3/38, H02J 4/00, H02J 9/06, H02J 13/00, H02M 5/40. Grid-tied variable frequency facility : Appl. N 17/651962 : Filed 22.02.2022 : Pub. 15.11.2022 : / Paul W. Donahue, Ryan Paul Donahue, Jeffrey Alan Dankworth ; Assignee Neworld Energy LLC ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11502515/en?oq=US11502515.html (дата обращения: ДД.ММ.ГГГГ).