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Pat. 11225160 United States, Int. Cl.22 B60L 53/50, B60L 53/62, B60L 53/67, H02M 7/04. Energy storage device charging system applied to solid state transformer structure and three-phase power system having the same : Appl. N 16/899933 : Filed 12.06.2020 : Pub. 18.01.2022 : / Sheng-Hua Li ; Assignee Delta Electronics Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11225160/en?oq=US11225160.html (дата обращения: ДД.ММ.ГГГГ).