CAJ | 학술논문

由于串扰耦合效应的影响,开关电源输入输出线距离较近时,输入线和输出线传导噪声高频段相互耦合明显,不利于EMI滤波器的设计。针对输入线和输出线同侧的开关电源,基于多导体传输线（MTLs）理论和弱耦合串扰模型,分析了共模噪声电流传播途径,建立了开关电源输入输出线串扰模型,并给出单位长度参数。仿真和实验结果表明,输出线传导噪声的变化能够影响输入线的测试结果。针对输入输出线传导发射,提出了相应的改善措施。
유우천우우합효응적영향,개관전원수입수출선거리교근시,수입선화수출선전도조성고빈단상호우합명현,불리우EMI려파기적설계。침대수입선화수출선동측적개관전원,기우다도체전수선（MTLs）이론화약우합천우모형,분석료공모조성전류전파도경,건립료개관전원수입수출선천우모형,병급출단위장도삼수。방진화실험결과표명,수출선전도조성적변화능구영향수입선적측시결과。침대수입수출선전도발사,제출료상응적개선조시。
Due to the effect of crosstalk coupling,switching power supplies with input lines and output lines closely show that high frequency conducted noises in both lines couple seriously,and it goes against electromagnetic interference （EMI） filter design. The switching power supply with input and output lines on the same side is investigated. Based on multiconductor transmission lines （MTLs） theory and weak-coupling crosstalk model,common mode （CM） noise current propagation paths are analyzed. In addition,the crosstalk model and per-unit-length parameters between input and output lines are presented. Simulation and experiment results indicate the change of output line conducted noise may influence the test result of input line. One improvement method is proposed responsibly to conducted emission.