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Pat. 9917534 United States, Int. Cl.22 H02M 7/797, H01F 27/42, H02M 1/08, H02M 7/217, H02M 7/219, H02J 3/18, H02J 3/36, H02M 1/00, H02M 7/483, H02M 7/5388. Power conversion device with a plurality of series circuits : Appl. N 15/248142 : Filed 26.08.2016 : Pub. 13.03.2018 : / Shigenori Inoue, Shuji Katoh, Jun Narushima, Tetsuya Kato ; Assignee Hitachi Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9917534/en?oq=US9917534.html (дата обращения: ДД.ММ.ГГГГ).