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Pat. 10008917 United States, Int. Cl.22 B66B 1/32, B66B 1/30, H02M 1/00, H02M 1/12, H02M 5/458, H02M 7/487, H02P 3/14, H02P 3/18, H03H 7/00. Bus capacitor bank configuration for a multi-level regenerative drive : Appl. N 15/104195 : Filed 18.12.2013 : Pub. 26.06.2018 : / Ismail Agirman, Steven M. Millett, Shashank Krishnamurthy, Yang Wang ; Assignee Otis Elevator Co ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10008917/en?oq=US10008917.html (дата обращения: ДД.ММ.ГГГГ).