Source current type active filter application with double-LISN for EMI noise problem in induction motor control systems

The source current detection type AF has a merit of robustness to the load variation, but a problem of the resonance between the AF and an LC filter often arises, if an LC filter is connected parallel to the AF. In this paper, double-LISN line impedance stabilization network circuit based AF, resonance analysis and the simulation results comparing with experimental ones are studied and discussed.