EMI Filter Design for a Single-stage Bidirectional and Isolated AC–DC Matrix Converter

Abstract

This paper describes the design of an electromagnetic interference (EMI) filter for the high-frequency link matrix converter (HFLMC). The proposed method aims to systematize the design process for pre-compliance with CISPR 11 Class B standard in the frequency range 150 kHz to 30 MHz. This approach can be extended to other current source converters which allows time-savings during the project of the filter. Conducted emissions are estimated through extended simulation and take into account the effect of the measurement apparatus. Differential-mode (DM) and common-mode (CM) filtering stages are projected separately and then integrated in a synergistic way in a single PCB to reduce volume and weight. A prototype of the filter was constructed and tested in the laboratory. Experimental results with the characterization of the insertion losses following the CISPR 17 standard are provided. The attenuation capability of the filter was demonstrated in the final part of the paper.

Comparison of Measurement Methods of LV Grid Access Impedance in the Frequency Range Assigned to Nb‑Plc Technologies

“…Therefore, the results of this work provide a proper characterization of NIE in different scenarios, in the frequency range up to 500 kHz, in order to contribute with useful information for current configurations of robustness techniques for NB-PLC [57,58] and target mitigation actions [59][60][61]. A standardized measurement method would also be beneficial for the calibration of LISN-based networks in lab EMC tests (LISN: Line Impedance Stabilization Network).…”

A Study on Input Power Factor Compensation Capability of Matrix Converters

“…Therefore, to utilize maximum IPF at the main power supply, we need to investigate the displacement angle caused by the input filter. Figure 1 shows a typical input filter configuration for MCs, namely, a second-order LC filter with a damping resistor and an inductor in parallel [16]. Figure 4 shows a simplified model of this input filter, from which the relationship between ( Equations (17) and (18) become (19) and (20), respectively, as follows:…”

A Topology-Based Approach to Improve Vehicle-Level Electromagnetic Radiation

“…According to the previous analysis results, DC/DC was the main interference source. In this section, considering both the cost and filtering effect, a single-phase DC power filter (see Figure 13) was selected to prevent the disturbance of DC/DC from radiating by its connected high-voltage cables [26]. Its equivalent circuit model, including the parasitic effects is shown by Figure 13c, whose circuit parameters were provided by the manufacturer and listed as: LC = 0.45 mH, CY = 4.7 nF, CX = 470 uF, R = 0.47 MΩ, EPC = 67 nF, EPR = 16.8 kΩ, ESL = 7 nH, ESR = 0.05 mΩ.…”