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Pat. 11422200 United States, Int. Cl.22 G01R 31/40, G01R 27/26, H02M 1/00, H02M 7/219, H02M 7/49. Cascade converter and online monitoring method thereof : Appl. N 16/734150 : Filed 03.01.2020 : Pub. 23.08.2022 : / Rufeng Liu, Daiping Zhou, Yongqiang Lang ; Assignee Delta Electronics Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11422200/en?oq=US11422200.html (дата обращения: ДД.ММ.ГГГГ).