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Pat. 10008937 United States, Int. Cl.22 H02J 1/00, H02M 1/12, H02M 1/42, H02M 3/155, H02M 3/158, H02M 3/28, H02M 7/48. Apparatus for controlling DC link voltage in power cell of medium-voltage inverter : Appl. N 15/800167 : Filed 01.11.2017 : Pub. 26.06.2018 : / Jong-Je Park, Seung-Ki Sul, Jeong-Mock Yoo, Hyun-Sam Jung ; Assignee Lsis Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10008937/en?oq=US10008937.html (дата обращения: ДД.ММ.ГГГГ).