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Pat. 11424694 United States, Int. Cl.22 H02M 7/487, H02M 7/5387, H02M 1/08, H02M 1/36. Method for controlling shutdown wave blocking of multilevel inverter circuit and application thereof : Appl. N 16/729254 : Filed 27.12.2019 : Pub. 23.08.2022 : / Jiacai Zhuang, Jun Xu, Bing Zhang, Peng Wen, Peng Wang ; Assignee Sungrow Power Supply Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11424694/en?oq=US11424694.html (дата обращения: ДД.ММ.ГГГГ).