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UCC28019电流波形震荡



最近在调试pfc输入电压是200V-265V@50hz,输出功率是2000W,400V,电感用的是铁硅铝材质,536UH。调试下来各方面感觉也没什么问题,电参仪显示功率因数也能达到0.95以上,但是是示波器看输入的波形有震荡,想请教各位这要怎么解决。