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Centre tap choke - problem with critical inductance

As a post below says, only one half of the choke is operating at a given time.

I think there will be a problem with using this arrangement as an input choke, in that the normal function of an input choke is that the magnetic field storage in the core "fills in" the gaps between the current peaks of the input, the critical inductance being the lowest value with enough energy storage to achieve this. In the centre tap arrangement this can't happen because the magnetic flux must reverse direction each half cycle, so it must fall to zero on the way through.

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