公开(公告)号：US20210167692A1

公开(公告)日：2021-06-03

申请号：US17259500

申请日：2019-03-11

申请人： OMRON Corporation

发明人： Noriyuki NOSAKA ,  Takeo NISHIKAWA ,  Wataru OKADA ,  Satoshi IWAI ,  Takanori ISHII ,  Gun ETO

IPC分类号： H02M5/451 ,  H02M5/452

摘要： A power converter apparatus is provided to include a switching circuit, and a filter circuit. The switching circuit generates an AC voltage by switching a DC voltage at a predetermining switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit induces first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is inserted between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than the switching frequency by insertion of the inductor.

公开(公告)号：US20210273553A1

公开(公告)日：2021-09-02

申请号：US17259521

申请日：2019-03-11

申请人： OMRON Corporation

发明人： Noriyuki NOSAKA ,  Takeo NISHIKAWA ,  Wataru OKADA ,  Satoshi IWAI ,  Takanori ISHII ,  Gun ETO

IPC分类号： H02M1/14 ,  H02M3/335 ,  H02M1/12

摘要： A power converter apparatus is provided to include a switching circuit, and a filter circuit. The switching circuit generates an AC voltage by switching a DC voltage at a predetermined switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit includes first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is inserted between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than multiple times the switching frequency by insertion of the inductor.