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Pat. 11431240 United States, Int. Cl.22 H02M 1/36, H02M 5/458, H02M 1/00, H02M 7/04, H02M 7/06, H02M 7/217, H02M 7/219. Frequency converter with reduced pre-charging time : Appl. N 17/290015 : Filed 19.09.2019 : Pub. 30.08.2022 : / Alexander Hensler, Philipp Oschmann ; Assignee Siemens Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11431240/en?oq=US11431240.html (дата обращения: ДД.ММ.ГГГГ).