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Pat. 10033263 United States, Int. Cl.22 H02M 1/12, H02M 7/483, H02M 7/49. System and method for optimizing fundamental frequency modulation for a cascaded multilevel inverter : Appl. N 15/188218 : Filed 21.06.2016 : Pub. 24.07.2018 : / Fang Zheng Peng, Shuitao Yang ; Assignee Michigan State University Msu ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10033263/en?oq=US10033263.html (дата обращения: ДД.ММ.ГГГГ).