US 12,136,874 B2
Electrical circuit for reducing electromagnetic noise or interference in a power converter
Shu Hung Henry Chung, Kowloon (HK); and Kewei Wang, Beijing (CN)
Assigned to City University of Hong Kong, Kowloon (HK)
Filed by City University of Hong Kong, Kowloon (HK)
Filed on Jun. 30, 2021, as Appl. No. 17/363,650.
Prior Publication US 2023/0006542 A1, Jan. 5, 2023
Int. Cl. H02M 1/44 (2007.01)
CPC H02M 1/44 (2013.01) 28 Claims
OG exemplary drawing
 
1. An electrical circuit for reducing electromagnetic noise or interference in a power converter, comprising at least one shunt capacitor arranged to connect with a grounded component of the power converter, wherein the at least one shunt capacitor is further arranged to be driven by an active control signal so as to sink a noise current originating from a noise source to the grounded component of the power converter, wherein the noise source is connected to the grounded component via a capacitive path formed by at least one stray capacitor; and wherein the active control signal is synchronized substantially to the noise current.