The reduction of fringing-effect power loss in gapped ferrite inductors by changing the resistance and diameter of windings

This article examines power loss and temperature distribution in the windings of gapped ferrite inductors exposed to a high fringing magnetic field at an air gap. The fringing magnetic field generates eddy-current losses in adjacent conductors, impacting the efficiency of power conversion. This extra power loss manifests itself in the form of so-called hotspots, and can be analysed by IR thermography. The presented research shows how a change in the cross-sectional area and/or resistivity of the wires near the air gap can decrease fringing-effect losses.