TY - GEN
T1 - Reduction of common-mode electromagnetic interference in isolated converters using Negative feedback
AU - Katzir, L.
AU - Singer, S.
PY - 2006
Y1 - 2006
N2 - In the field of power electronics, there is a trend for pushing up switching frequencies of switched-mode power supplies to reduce volume and weight. This trend causes an increasing level of electromagnetic interference (EMI) emissions. It is well known that common-mode EMI is resulted in by the switching of a parasitic capacitance of transistors, diodes, and transformers the power circuit consists of, which implies current flow to ground (actually the shielding) of the circuit. In this paper a method of common-mode EMI reduction, based on a negative feedback which implies compensating current flow is presented. . More specifically, desired EMI reduction in the family of isolated DC/DC converters is achieved by means of a compensating transformer winding and a capacitor. An isolated flyback converter was constructed and tested in the Power laboratory in Tel-Aviv University. Using a spectrum analyzer, it was found that the common-mode EMI created by the parasitic capacitance of the switching transistor decreased between 10 and 15 dB in the low frequency harmonics of the converter.
AB - In the field of power electronics, there is a trend for pushing up switching frequencies of switched-mode power supplies to reduce volume and weight. This trend causes an increasing level of electromagnetic interference (EMI) emissions. It is well known that common-mode EMI is resulted in by the switching of a parasitic capacitance of transistors, diodes, and transformers the power circuit consists of, which implies current flow to ground (actually the shielding) of the circuit. In this paper a method of common-mode EMI reduction, based on a negative feedback which implies compensating current flow is presented. . More specifically, desired EMI reduction in the family of isolated DC/DC converters is achieved by means of a compensating transformer winding and a capacitor. An isolated flyback converter was constructed and tested in the Power laboratory in Tel-Aviv University. Using a spectrum analyzer, it was found that the common-mode EMI created by the parasitic capacitance of the switching transistor decreased between 10 and 15 dB in the low frequency harmonics of the converter.
UR - http://www.scopus.com/inward/record.url?scp=50249173507&partnerID=8YFLogxK
U2 - 10.1109/EEEI.2006.321136
DO - 10.1109/EEEI.2006.321136
M3 - פרסום בספר כנס
AN - SCOPUS:50249173507
SN - 1424402301
SN - 9781424402304
T3 - IEEE Convention of Electrical and Electronics Engineers in Israel, Proceedings
SP - 180
EP - 183
BT - 2006 IEEE 24th Convention of Electrical and Electronics Engineers in Israel, IEEEI
Y2 - 15 November 2006 through 17 November 2006
ER -