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Connecting Common Mode Chokes in series configuration

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praveenhunchi

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Hi,

In one of the power supply applications, we have connected two common mode chokes in series , one of them is made of 4uH and K=0.94 and the other is made of 4uH and K=0.96.

Since i wanted to calculate the impedance profile of the combination, can i treat them as a single common mode choke with a inductance of 8uH ?

If so what would be the effective coupling co-efficient of this combination ?

Thanks
 

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