Thermographic measurement and thermal modelling of air gap inductors in H-F power forward converters

Abstract

This paper examines the impact of the fringing field of an air gap on temperature distribution in the windings of output inductors in high-frequency forward converters. For this aim, a DC-DC H-F forward converter and a centre-gapped ferrite core inductor were constructed and the measurements of thermal characteristics were performed using dynamic, time-dependent thermographic analysis. The objective of this research was to consider how the length of an air gap affects the temperature distribution and power loss in the windings of output inductors in H-F forward converters.