Characteristics of Electric and Magnetic Circuit Parameters in Thread-Type Magnetic Core System

This paper presents the characteristics of a thread-type magnetic core system in terms of the electric and magnetic circuit parameters. The thread-type core, a magnetic core with a new structure, is composed of iron threads surrounded by an insulator. In the previous study, it was shown that the thread-type core can reduce an amount of iron loss [1]. In this study, the characteristics of the thread-type core are quantified in terms of the electric and magnetic circuit parameters such as iron loss resistance, magnetizing inductance, and reluctance. These parameters are compared with those of bulk- and lamination-type core systems. The circuit parameters are calculated using a numerical analysis of the finite-element method, and the calculated parameters are also compared with experimental data. The comparison shows that the thread-type core exhibits improved system parameters for magnetic systems, particularly in the high-frequency range. This means that the thread-type core has advantages in efficiency, core size, and power capacity. An additional numerical analysis shows that the more segmented thread-type core results in further improved performance.