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Pat. 10367355 United States, Int. Cl.22 H02J 3/18, H02J 3/38, H02M 7/49, H02M 7/5387, H02M 1/42, H02M 7/483, H02M 7/487. Cascaded multi-level inverter system and modulation method thereof, and controller : Appl. N 15/499152 : Filed 27.04.2017 : Pub. 30.07.2019 : / Jun Xu, Yu Gu, Yilei Gu ; Assignee Sungrow Power Supply Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10367355/en?oq=US10367355.html (дата обращения: ДД.ММ.ГГГГ).