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Pat. 10877082 United States, Int. Cl.22 G01R 31/08, H02J 13/00, H02M 1/32, H02M 7/757, H02M 1/088. Converter valve fault warning method and system : Appl. N 15/739750 : Filed 01.03.2017 : Pub. 29.12.2020 : / Shengfu Gao, Taixun Fang, Yongping Wang, Xiang Zhang, Weiming Pan, Ming Yuan, Guqing Zhou ; Assignee Nr Electric Co Ltd, Nr Engineering Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10877082/en?oq=US10877082.html (дата обращения: ДД.ММ.ГГГГ).