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EMI filter selection

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saeedmns68

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I want to get an EMI filter for my half bridge converter.The input voltage of my circuit(AC line supply voltage) is 220V 50HZ and the frequency of current coming from AC supply(load current) is 500KHZ,the cut-off frequencies(common mode and diffrential mode) calculation of an EMI filter is explained in the attached document.I want to know these frequencies(FR,CM & FR,DM) are the frequencies of from AC line voltage noise or the frequencies of the load current noise?in the other words we should choose EMI filter related to AC line supply voltage noise or load current noise?


View attachment A procedure for designing EMI filters for AC line applications.pdf
 

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