摘要
对传统测量开关电源传导干扰方法的优缺点进行了比较,并在此基础上提出了一种基于双电流探头的新测量方法,它可在不中断开关电源正常工作的情况下测量共模和差模干扰,并能在开关电源电磁干扰频率范围内获得较精确的干扰模型。
Traditional methods to measure switching mode power supply （SMPS） conducted noise have been described and compared, with advantages and disadvantages discussed, A new approach using two current probes to measure SMPS conducted noise is introduced. The proposed approach allows measurement of CM and DM noise of a SMPS without interrupting its normal operation and can obtain an equivalent circuit model.
关键词
开关电源
共模干扰
差模干扰
电流探头
SMPS, common mode noise, differential mode noise, current probe
