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Pat. 10454365 United States, Int. Cl.22 H02M 1/42, H02M 1/08, H02M 3/335, H02M 3/337, H02M 7/06, H02M 1/00. Apparatus and method for controlling pulse width modulation switching frequency : Appl. N 15/836883 : Filed 10.12.2017 : Pub. 22.10.2019 : / Dong-Hwi Lim, Woo-Seok Shim, Hyun-Doo Hwang ; Assignee Hyundai Autron Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10454365/en?oq=US10454365.html (дата обращения: ДД.ММ.ГГГГ).