The cables of switching power supply which are connected in parallel is an important radiated electromag-netic interference(EMI) source for the switching power supply. Aimed at the problem of inaccurate prediction of radiated EMI of cables connected in parallel due to an unclear mutual-coupling effect,a radiated EMI model of cables of switch-ing power supply is proposed by taking into account the mutual-coupling effect between cables. Through the modeling of mutual-impedance which describes the mutual-coupling effect between cables,the radiated EMI input impedance model de-scribing the radiation characteristics of cables of switching power supply is obtained. Then,the radiated EMI model of cables of switching power supply is obtained considering the mutual-coupling effect. Finally,an experimental platform for measuring the radiated EMI was built,and experimental results show that the proposed radiated EMI model which takes the mutual-cou-pling effect into account can predict the radiated EMI of cables of switching power supply more accurately.
关键词
辐射电磁干扰/开关电源/线缆/互耦
Key words
Radiated electromagnetic interference (EMI)/switching power supply/cable/mutual-coupling
维普
万方数据