分析了电源电磁干扰产生的机理及电源滤波器的作用；
The function of power filter and the mechanism of electromagnetic interference is analyzed.
由于逆变器电源对输出接地电容的限制，对严重的共模电磁干扰难以用大容量的共模滤波器抑制共模噪声。
With the limitation to the ground capacitance by inverter, it is difficult to suppress the severe common-mode noise by large CM filter.
本文对两个新提出的电磁阻带结构滤波器建立了等效电路，并用该方法优化了相应的参数。
Equivalent circuits of two proposed electromagnetic stop band filters have been developed. And their parameters have been optimized using this method.
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