Current Controlled Variable Inductance Wire

This paper describes development of a magnetic wire whose impedance varies with the current. The wire is a copper wire coated with a magnetic film, deposited via electrodeposition. The high permeability of the coating, coupled with the small geometry, results in a relatively large inductance. In addition, as the current is increased, the loss increases, thus increasing the impedance by an order of magnitude. Due to these properties, these wires may be potentially useful as a passive current limiting and surge protection device.