A multi-port electromagnetic device comprises a first magnetic core having
a first closed flux path and a second magnetic core having a second
closed flux path, with the first closed flux path being independent from
the second closed flux path. At least one first winding
electromagnetically couples the first magnetic core to the second
magnetic core, and at least one second winding electromagnetically
couples the first magnetic core to the second magnetic core independent
of the electromagnetic coupling of the at least one first winding such
that current application in one of the first or second windings does not
induce a magnetic flux in the other one of the first or second windings.