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Pat. 10014686 United States, Int. Cl.22 H02M 3/335, H02J 3/02, H02J 3/36, H02J 3/00, H02M 1/42. Commutation control method and commutation control apparatus : Appl. N 15/538209 : Filed 29.09.2015 : Pub. 03.07.2018 : / Dongbin Lu, Yongping Wang, Zhenxi Wang, Junsheng Wang, Weiming Pan ; Assignee Nr Electric Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10014686/en?oq=US10014686.html (дата обращения: ДД.ММ.ГГГГ).