抑制传导EMI策略-随机调制技术研究

Suppression Conducted EMI Schemes-Investigation on the Randomized PWM Techniques

电力电子系统的EMC/EMI问题已经受到广泛的关注。在此介绍了电力电子系统中,应用随机调制技术抑制传导电磁干扰(EMI)的基本原理、功率谱密度特性的理论分析方法,给出了DSP实验结果。

With the induction of the international electromagnetic compatibility (EMC) directives, there is an increasing awareness of the electromagnetic interference (EMI) problems of switching power electronics. The principle, spectral characteristics analyses of the randomised modulation technique have been proposed in the paper. The theoretical and measured results indicate that novel entirely random switching schemes employing the twin random factor can suppress conducted EMI in the power converters in which the harmonic spectrum can be dispersedly and continuously distributed effectually.