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Pat. 11239746 United States, Int. Cl.22 H02M 1/36, H02M 1/08, H02M 3/335, H02M 7/5387, H02J 3/38, H02M 1/00. Two-stage converter and method for starting the same, LLC converter, and application system : Appl. N 16/783310 : Filed 06.02.2020 : Pub. 01.02.2022 : / Tao Zhao, Fushuai Zhuang, Xinyu Wang, Jiacai Zhuang, Mingda Wang, Yuan Zhuang ; Assignee Sungrow Power Supply Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11239746/en?oq=US11239746.html (дата обращения: ДД.ММ.ГГГГ).