Characteristics analysis and performance evaluation for interleaved boost converter with integrated winding coupled inductor

The integrated magnetic component for interleaved converters has been developed in order to satisfy the demand for high power density of converters. The close-coupled inductor method and the loosely coupled inductor method are well known as techniques that can achieve downsizing of magnetic components. As another approach, the integrated winding coupled inductor has already been proposed. However, the advantages of interleaved converter with the integrated winding coupled inductor have yet to be elucidated fully as compared with the other methods. Therefore, characteristics of inductor ripple current and magnetic flux in the core for the integrated winding coupled inductor are analyzed and evaluated in this paper. As a result of the analysis, integrated winding coupled inductor method provides three attractive features as compared with loosely coupled inductor. The effectiveness of the integrated winding coupled inductor is discussed from theoretical and experimental point of view.