Study on Emi Analysis and Inhibitory Techniques for Switching Converter Devices

Abstract

Due to the high power conversion efficiency, high efficiency and energy saving, wide voltage regulation range and light weight, switching converters are widely used in many fields such as industry, military, and medicine. However, strong electromagnetic interference can affect the normal operation of switching power supply and also has a negative impact on the external environment. Based on this phenomenon, we focus on the electromagnetic compatibility of switching power supply, and a highfrequency model for PSFB circuit is proposed. At last, a set of verification tests are conducted to verify the validity of the proposed model in this paper.

Aging Monitoring of Bond Wires Based on Emr Signal Spectrum Characteristics for Igbt Module

“…According to the analysis of the equivalent circuit of DM conducted interference, the DM EMI current is shown in (4). With the increase of the number of life-off bond wires, the equivalent impedance of IGBT module increases, so does the DM EMI current.…”

“…According to statistics, about 38% of the power converter failures are caused by power devices [3]. The aging of IGBT module will not only affect the performance of power converter, but also cause system damage [4]. As one of the common packaging aging forms, the health monitoring of IGBT module bond wires aging is of great significance [5].…”

Fast Measurement and Prediction Method for Electromagnetic Susceptibility of Receiver

“…In the complex electromagnetic environment, especially large platforms or systems such as aircraft, satellites, and high-speed railways, or ships with dense high-power radiation sources and numerous high-sensitivity receivers, multiple signals with high power are usually coupled to the input port of the receivers [1−3]. These signals may cause linear and nonlinear effects and interference in the receiver on receiving paths [4,5]. Furthermore, these interferences can lead to a series of electromagnetic compatibility (EMC) problems, such as narrowed effective reception bandwidth, distorted signal waveform and image, time drifting, and increased noise [6,7], leading to system performance degradation or even malfunction.…”

Research on Conducted Emi Characteristics of Sic Mosfet Considering Temperature Effect

“…SiC MOSFET is widely used in high-frequency and high-power fields such as electric vehicle, smart grid, and aerospace due to its high switching speed, high working temperature, and low switching loss [1][2][3]. However, high switching frequency and high power increase the electromagnetic interference (EMI) in the system [4] which affects the safe operation of the surrounding equipment [5,6]. Due to the long-time operation of SiC MOSFET under severe conditions, it is vital to properly handle the electromagnetic compatibility (EMC) problem to ensure the reliable operation of the system [7].…”