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Re: Current Limiting and Impedence

Original poster: "Gerald  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Yes, with high permeability cores, it doesn't take much of a gap to significantly increase the magnetic path.
(Integral of H.dl)

Gerry R.


Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>

Some toroidal cores have a distributed airgap, namely iron-powder
types. These are designed to handle high DC currents and are totally
unsuitable for use as transformer cores and large alternating
currents.
     Gapping a core artificially boosts the length of the magnetic
path enormously.

Malcolm