Modal Characterization of Power-Line Filter Capacitors

作者：Sanchez A M^*; Perez A; Regue J R; Ribo M; Rodriguez Cepeda P; Pajares F J

来源：IEEE Transactions on Power Delivery, 2010, 25(1): 289-297.

DOI：10.1109/TPWRD.2009.2028780

• Common mode
• conducted emissions
• differential mode
• electromagnetic compatibility (EMC)
• equivalent modal model
• modal conversion
• power-line filter
• Y-class capacitor

A typical power-line filter is composed, essentially, by common-mode chokes, X-class and Y-class capacitors. A good characterization of these components is needed to develop a technique to design the optimal power- line filter for an electric or electronic device by finding their best values. In this paper, a new methodology to characterize the behavior of power- line filter capacitors is presented. This methodology is based on a model where common-mode and differential-mode interference are separated into different ports in order to facilitate the study of the propagation phenomena. The methodology is used to explain modal conversion inside impedance networks with X-class and Y-class capacitors, to predict the common-mode and differential-mode emissions when these capacitors are connected to electric or electronic devices, and to improve the classical methodology of power- line filter implementation finding the optimal capacitances of the impedance networks. This new methodology has been successfully tested by using real measurements from capacitors and electric devices.

• 出版日期2010-1