Title :
A study of common mode noise current of bridgeless PFC circuit considering voltage change in Y-capacitors
Author :
Kewei Shi ; Shoyama, Masahito ; Tomioka, Satoshi
Author_Institution :
Kyushu Univ., Fukuoka, Japan
Abstract :
Since the loss of input rectifying diode bridge in the conventional PFC circuit reduces the efficiency, the bridgeless PFC circuit has been proposed. However, the performances of EMC in some bridgeless PFC circuits are unsatisfactory. In order to improve noise performance, the noise mechanism should be investigated as the first step. In this study, common mode noise current of conventional bridge PFC circuit and totem-pole bridgeless PFC circuit have been analyzed considering the voltage change in Y-capacitors. Additionally a method has been proposed to suppress common mode noise current by about 40dB on the totem-pole bridgeless PFC circuit.
Keywords :
electromagnetic compatibility; rectifying circuits; EMC; Y-capacitors; common mode noise current; input rectifying diode bridge; totem-pole bridgeless PFC circuit; voltage change; Bridge circuits; Capacitors; Equations; Inductors; Mathematical model; Noise; Switches; Bridgeless PFC circuit; Common mode noise current; Totem-pole type; Y-capacitor;
Conference_Titel :
Electromagnetic Compatibility, Tokyo (EMC'14/Tokyo), 2014 International Symposium on
Conference_Location :
Tokyo
