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Pat. 11101741 United States, Int. Cl.22 H02M 7/5387, H02M 7/493. Parallel control method and system for single-phase inverters and inverter : Appl. N 17/157317 : Filed 25.01.2021 : Pub. 24.08.2021 : / Bo Zhang, Qingwen Sun, Junbo Zhao, Yunlong Liu, Xuebin Xing, Congcong Wang, Yufei Chen, Meiyun Li, Wendong Ji, Zhenzong Zhu, Yongjie Mao, Shen Wang ; Assignee Crrc Qingdao Sifang Rolling Stock Research Institute Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11101741/en?oq=US11101741.html (дата обращения: ДД.ММ.ГГГГ).