이중 전류 프로브 기반 블랙박스 임피던스 모델링을 활용한 EMI 필터 설계 = EMI Filter Design Based on Black-Box Impedance Modeling Using Dual Current Probes

다국어 초록 (Multilingual Abstract)

This paper presents a dual current probe-based method for extracting the mode impedance of power electronic systems under actual operating conditions. To overcome sensitivity degradation in the low-frequency region, variable turns were applied depending on the frequency.
The measured impedance data were used to construct a simplified black-box model using passive RLC components. Based on the target insertion loss, the cutoff frequency was analytically calculated, and a first-order LC filter was designed. Simulation results comparing the impedance and insertion loss before and after filter insertion demonstrated that the proposed method effectively suppressed EMI noise at the desired frequency. This approach enables filter design without circuit knowledge and is highly applicable to practical systems.