Title :
An improved design of conducted EMI suppressing in SMPS
Author :
Xu Pingfan ; Chen Zhongren ; Xiao Xing
Author_Institution :
Zhongshan Polytech., Zhongshan, China
Abstract :
The conducted EMI problem caused by grounding net impedance has attracted more and more attention in resent years. A model of interference system including parasitic capacitance was built. The theoretical feasibility of the measure and the mechanism of the conducted EMI caused by grounding loop were discussed. This paper proposed an improved design of conducted EMI suppressing, which can reduce the parasitic capacitance between primary and secondary winding effectively. Finally, a 100W(20V5A) SMPS was built to verify the effectiveness of this theory and the experimental results were also demonstrated.
Keywords :
earthing; electromagnetic interference; switched mode power supplies; windings; SMPS; conducted EMI suppressing design; conducted EMl problem; grounding loop; grounding net impedance; interference system; parasitic capacitance; power 100 W; primary winding; secondary winding; switching mode power supplies; theoretical feasibility; Earth; Electromagnetic compatibility;
Conference_Titel :
Harmonics and Quality of Power (ICHQP), 2012 IEEE 15th International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4673-1944-7
DOI :
10.1109/ICHQP.2012.6381305
