This paper investigates the low-frequency electromagnetic interference (EMI) from switched-mode power supplies (SMPS) by electromagnetic field coupling. The interferences are calculated by means of equivalent circuits that represent the weak magnetic and electric field coupling between the EMI sources of a SMPS and a reference victim circuit. The inductive and capacitive parameters of the equivalent circuits are calculated by simple analytical formulas using suitable criteria for determining the corresponding dimensions of the EMI source circuits. The models are applied to a SMPS well predicting the noise voltage measured by a triple loop antenna (TLA).
Prediction of low-frequency electromagnetic interferences from SMPS / G. L. Giuliattini Burbui; U. Reggiani; L. Sandrolini. - ELETTRONICO. - (2006), pp. 472-477. (Intervento presentato al convegno 2006 IEEE Int. Symposium on Electromagnetic Compatibility (EMC 2006) tenutosi a Portland, Oregon, USA nel Aug. 14-18, 2006) [10.1109/ISEMC.2006.1706350].
Prediction of low-frequency electromagnetic interferences from SMPS
REGGIANI, UGO;SANDROLINI, LEONARDO
2006
Abstract
This paper investigates the low-frequency electromagnetic interference (EMI) from switched-mode power supplies (SMPS) by electromagnetic field coupling. The interferences are calculated by means of equivalent circuits that represent the weak magnetic and electric field coupling between the EMI sources of a SMPS and a reference victim circuit. The inductive and capacitive parameters of the equivalent circuits are calculated by simple analytical formulas using suitable criteria for determining the corresponding dimensions of the EMI source circuits. The models are applied to a SMPS well predicting the noise voltage measured by a triple loop antenna (TLA).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
