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Pat. 11239765 United States, Int. Cl.22 H02M 7/483, H02M 7/5387, H02M 1/00, H02M 7/487. Multi-level circuit, three-phase multi-level circuit, and control method : Appl. N 16/698517 : Filed 27.11.2019 : Pub. 01.02.2022 : / Zhuyong Huang, Xiaofei Zhang, Chuntao Zhang ; Assignee Huawei Digital Power Technologies Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11239765/en?oq=US11239765.html (дата обращения: ДД.ММ.ГГГГ).