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Pat. 10505437 United States, Int. Cl.22 H02M 1/32, G01R 15/14, G01R 27/18, G01R 31/40, G05B 15/02, H02J 3/38, H02M 3/04, H02H 3/16, H02M 1/00, H02M 3/158, H02M 7/5387. Power converting device and ground impedance value detecting method : Appl. N 15/469595 : Filed 27.03.2017 : Pub. 10.12.2019 : / Tsung-Han Tsai, Po-Jen Hou, Chen-Wei Ku, Xin-Hung Lin ; Assignee Delta Electronics Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10505437/en?oq=US10505437.html (дата обращения: ДД.ММ.ГГГГ).