It discloses thespectrum characters of the conducted interference signals in electrical weldingmachine with wavelet package. On that basis, the LC filter and the active power filter(APF) are designed for restricting conducted EMI.

• 利用小波包分析方法揭示焊机传导型谐波干扰信号的频谱特征,在以上研究的基础上进行传导型干扰无源及有源滤波器的设计,建立有源滤波器的MATLAB仿真模型,利用实验方法验证仿真结果。