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Pat. 11121619 United States, Int. Cl.22 H02M 1/14, H02M 1/08, H02M 1/15, H02M 3/156, H02M 7/537. Bus voltage secondary ripple suppression method and device : Appl. N 16/898913 : Filed 11.06.2020 : Pub. 14.09.2021 : / Chengwei Shu, Jiayu Yao, Shijun Li, Jin Cheng ; Assignee Sma Solar Technology Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11121619/en?oq=US11121619.html (дата обращения: ДД.ММ.ГГГГ).