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Pat. 10498233 United States, Int. Cl.22 H02M 3/155, H02M 1/088, H02M 1/14, H02M 7/48, H02M 7/483. Bidirectional chopper circuit : Appl. N 15/756770 : Filed 07.03.2016 : Pub. 03.12.2019 : / Hirofumi Akagi, Makoto Hagiwara ; Assignee Toshiba Mitsubishi Electric Industrial Systems Corp, Tokyo Institute of Technology Nuc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10498233/en?oq=US10498233.html (дата обращения: ДД.ММ.ГГГГ).