Characterization, Evaluation, and Design of Noise Separator for Conducted EMI Noise Diagnosis

TLDR

The study defines three requirements for noise separators, critiques conventional evaluation techniques, and introduces a parasitic‑controlled separator design. Noise separators are characterized and assessed via scattering parameters (S‑parameters) against the defined requirements, and the proposed prototype is evaluated using this method. EMI measurements demonstrate that the new separator effectively isolates noise and is user‑friendly.

Abstract

In this paper, at first, three requirements for noise separators are specified and the disadvantages of traditional evaluation methods are pointed out. Noise separators are then characterized using scattering parameters (S-parameters). Existing noise separators are evaluated according to the specified requirements. Finally a noise separator is proposed with parasitic controlled design and the prototype is evaluated using the proposed method. An electromagnetic interference (EMI) measurement shows that the proposed noise separator can effectively separate noise and that it is easy to use.